Quick Eagle Networks Network Card DL3800E User Guide

DL3800E  
Inverse Multiplexer  
Users Guide  
Part 098-30380-01 Rev F  
July 9, 2001  
 
Buyer's exclusive remedy, and Quick Eagle Networks' total liability, for any  
and all losses and damages arising out of any cause whatsoever (whether  
such cause is based in contract, tort [including negligence], strict liability,  
or otherwise) shall in no event exceed the repair price of the unit from  
which such cause arises. In no event shall Quick Eagle Networks be liable  
for incidental, indirect, special or consequential damages resulting from  
any SUCH CAUSE EVENT WHETHER OR NOT QUICK EAGLE  
NETWORKS IS AWARE OF THE POSSIBILITY OF SUCH DAMAGES.  
Quick Eagle Networks may, at its sole option, either repair or replace  
defective goods or work, and shall have no further obligation to buyer.  
Return of the defective items to Quick Eagle Networks shall be at buyer's  
risk and expense.  
Quick Eagle Networks shall not be liable for failure to perform its  
obligations if such results directly or indirectly from, or is contributed to  
by, any act of God or of buyer; riot; fire; explosion; accident; flood;  
sabotage; epidemics; delays in transportation; lack of or inability to obtain  
raw materials, components, labor, fuel or supplies; governmental laws,  
regulations or orders; or labor trouble, strike, or lockout (whether or not  
such labor event is within the reasonable control of Quick Eagle  
Networks); other circumstances beyond Quick Eagle Networks' reasonable  
control, whether similar or dissimilar to any of the foregoing.  
DISCLAIMER  
Quick Eagle Networks makes no representation of warranties with respect  
to the contents of this document and specifically disclaims any implied  
warranties of merchantability or fitness for any particular purpose. Further,  
Quick Eagle Networks reserves the right to revise this publication and to  
make changes in it from time to time without obligation to notify any  
person or organization of such revision or changes.  
Front Matter  
iii  
 
RIGHTS TO SOFTWARE  
Quick Eagle Network ("QEN") software products are proprietary to QEN  
and shall remain the property of QEN. Other than the limited, non-  
exclusive and non-transferable license granted to END USER to use the  
products internally, on a single CPU, for the purposes set forth herein, no  
rights in or to any QEN software products or documentation are granted to  
END USER. END USER is prohibited from duplicating, reproducing,  
displaying, printing, disassembling, decompiling, reverse engineering or  
analyzing for reverse engineering, distributing, sublicensing, disclosing or  
otherwise transferring possession of or making available copies of QEN  
software products or documentation, or any part or portion thereof. END  
USER is also prohibited from making any modifications, additions,  
adaptations, enhancements, improvements, changes or derivative works of  
any QEN software product or documentation, or any part or portion  
thereof. QEN software products may include software (including source  
code) of Connexant Systems, Inc. and NetScout. The limitations on the  
license and prohibitions set forth above shall apply equally to all such third  
party software included in any QEN software products.  
ISO COMPLIANCE  
Products Manufactured Under  
An ISO 9001 Certified  
Quality Management System  
YEAR 2000 COMPLIANCE  
Quick Eagle Networks warrants that products offered as generally  
available for sale and shipped on or after February 1, 1999 will meet “Year  
2000 compliant” requirements. In addition, software released in and after  
1998 meets the Year 2000 compliance criteria. For more information on  
Year 2000 compliance, see our web site information at www.quickeagle.com  
and click on the Year 2000 compliance icon.  
iv  
DL3800E Inverse Multiplexer User’s Guide — July 9, 2001  
 
Malfunction of the equipment: In the event this equipment should fail to  
operate properly, disconnect the unit from the telephone line. Try using  
another FCC approved telephone in the same telephone jack. If the trouble  
does not persist and appears to be with this unit, disconnect the unit from  
the telephone line and discontinue use of the unit until it is repaired. Please  
note that the telephone company may ask that you disconnect this  
equipment from the telephone network until the problem has been  
corrected or until youre sure that the equipment is not malfunctioning.  
WARNING: The DL3800 Inverse Multiplexer complies with FCC Part  
15 of the Federal Communications Commission (FCC) Rules  
concerning radio frequency emissions for Class A computing devices.  
The following section is required by the FCC.  
CAUTION: In accordance with FCC Part 15 section 15.21, changes or modifications  
made by the buyer that are not expressly approved by Quick Eagle Networks could  
void the buyer’s authority to operate this equipment. This equipment has been tested  
and found to comply with the limits for a Class A digital device, pursuant to Part 15 of  
the FCC Rules. These limits are designed to provide reasonable protection against  
harmful interference when the equipment is operated in a commercial environment.  
This equipment generates, uses, and can radiate radio frequency energy and, if not  
installed and used in accordance with the instruction manual, may cause harmful  
interference to radio communications. Operation of this equipment in a residential  
area is likely to cause harmful interference in which case the user will be required to  
correct the interference at his own expense.  
INTERNATIONAL COMPLIANCE  
Industry Canada  
This Class A digital device meets all requirements of the Canadian  
Interference-Causing Equipment Regulations.  
Cet appareil numérique de la classe A respecte toutes les exigences du  
Règlement sur le matériel brouilleur du Canada.  
Front Matter  
v
 
VCCI  
NOTE: As per the Voluntary Control Council for Interference by  
Information Technology Equipment (VCCI), the DL3800E Inverse  
Multiplexer complies with VCCI Class 1 ITE. This equipment is in the 1st  
Class category (information equipment to be used in commercial  
and/or industrial areas) and conforms to the standards set by the  
Voluntary Control Council for Interference by Information Technology  
Equipment aimed at preventing radio interference in commercial  
and/or industrial areas. Consequently, when used in a residential area  
or in an adjacent area thereto, radio interference may be caused to  
radios and TV receivers, etc. Read the instructions for correct handling.  
REGULATORY COMPLIANCE  
European harmonized standards 73/23/EEC/, 91/31/EEC,  
89/336/EEC, 93/68/EEC, and 91/263/EEC  
UL 1950 3rd Edition  
CAN/CSA C22.2 No. 950-95  
Comision Federal de Telecommunicationes (Mexico)  
CISPR 22 Level B (EN 55022)  
vi  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Table of Contents  
Preface  
xvii  
Audience  
xvii  
xvii  
Organization  
Conventions  
Symbols  
xviii  
xviii  
Typography  
xix  
Quick Eagle Networks Technical Support  
Returning a Unit  
xx  
xx  
Send Us Your Comments  
Document Change Record  
xxi  
xxi  
Chapter 1, Quick Install Guide  
1-1  
Purpose  
1-1  
1-1  
1-1  
Configuration  
Equipment Needed  
Setup  
1-2  
1-2  
1-2  
1-2  
1-2  
1-3  
1-3  
Terminal Log On  
Terminal Configuration  
Unit Configuration  
DTE Configuration  
Network Configuration  
Save Configuration  
Chapter 2, Introduction  
2-1  
System Overview  
Product Features  
System Features  
2-1  
2-2  
2-2  
System Benefits  
2-3  
vii  
 
Application  
2-3  
Functional Description  
Signal Flow  
2-4  
2-4  
E1 Port Crossover Detection  
Overhead Functions  
2-5  
2-6  
Chapter 3, Installation  
3-1  
Installation  
Mounting  
3-1  
3-2  
3-2  
Rack Mounting  
Desk Operation And Stacking  
3-2  
Power Cables And Connections  
AC Power Connection  
3-3  
3-3  
DC Power Connection  
3-3  
E1 Network Connection  
3-5  
3-5  
3-5  
3-6  
DTE Cable And Connection  
ASCII Terminal and SNMP Connection  
Direct Connection  
Modem Connection  
Telnet Connection  
Daisy Chaining  
3-6  
3-6  
3-7  
Chapter 4, Terminal Interface  
4-1  
Log In/Log Off  
4-1  
4-2  
4-2  
Terminal Operation Overview  
General Menu Flow  
Screen Description  
4-2  
Inverse Multiplexer Main Menu Commands  
Select Local/Remote  
4-4  
4-4  
4-5  
4-11  
Alarms and Status  
Statistics  
Event History  
4-15  
viii  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Configuration  
Unit Configuration  
4-17  
4-17  
4-20  
4-25  
4-28  
4-30  
4-30  
4-31  
4-33  
4-34  
4-35  
4-37  
4-39  
4-42  
4-42  
4-43  
4-44  
4-44  
4-44  
4-44  
4-45  
4-46  
4-47  
DTE Configuration  
Network Configuration  
Network Thresholds  
Save Configuration  
System Utilities  
Software Download  
Software Download Options  
RAM Software Options  
Delete Entire Unit Configuration (revert to factory config)  
Login Configuration  
SNMP Configuration  
In-Band SNMP to Remote  
Save Configuration  
Tests  
DTE/Network Loopback  
Payload Loopback  
Line Loopback  
Local Loopback  
Remote Loopback Detection  
Manual Network Restoration  
Logout  
Chapter 5, Front Panel Interface  
5-1  
General  
5-1  
5-1  
5-1  
5-2  
Display Overview  
Button Overview  
Exit Button  
Up Arrow and Down Arrow Buttons  
Enter Button  
5-2  
5-2  
ix  
 
Front Panel LEDs  
5-3  
5-4  
Access Levels And Protected Mode  
Power Up And Reset  
Top Menu  
5-5  
5-5  
5-7  
5-7  
5-8  
Select Remote/Select Local  
Display Menu  
Node (Common Equipment) Status  
DTE Status  
5-9  
5-9  
5-9  
NET (1-8) Status  
NET (1-8) Statistics  
Test Menu  
5-12  
5-14  
5-14  
DTE Tests  
DTE/NET Loopback  
Network Tests (1-8)  
Payload Loopback  
Line Loopback  
5-15  
5-15  
5-16  
5-16  
Local Loopback  
Configuration Menu  
Node Configuration  
5-17  
5-19  
DTE Configuration Menu  
Network Config  
5-24  
5-26  
5-28  
5-28  
NET N Config  
Network Thresholds  
Chapter 6, Diagnostics  
6-1  
Equipment Return And Repair  
Running Diagnostic Tests  
6-1  
6-1  
6-2  
DTE/Network Loopback Test  
LOCAL Loopback Test  
6-2  
6-3  
6-3  
6-3  
Payload Loopback and Line Loopback Tests  
Possible Sources of Problems  
Troubleshooting the DL3800E  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Appendix A, Specifications  
A-1  
E1 Network Interface  
External Clock Interface  
DTE Interface  
A-1  
A-1  
A-2  
A-2  
A-2  
A-3  
A-3  
A-3  
A-3  
A-4  
A-4  
COMM PORT  
NMS Port (SNMP)  
Front Panel  
Diagnostics  
Power  
Environmental  
Physical /Connectors  
External Alarm Contacts  
Appendix B, Pinouts  
B-1  
Terminal Connection  
B-1  
B-1  
B-2  
B-4  
DCE Connectors  
Channel 1 Data Cable Pin Assignments  
DB-25 to DC-37 Data Port Cable Pin Assignments  
Communication Port Pin Assignments  
B-5  
B-5  
RS-449, DC-37 to DB-25 DCE Cable Pin Assignments  
E1 Network Pin Assignments  
DB-25 to DE-9 Adapter Pinouts  
X.21 to DB-25 Cable Pinouts  
External Clock Connector Pin Assignments  
Alarm Pinout  
B-6  
B-6  
B-7  
B-7  
B-9  
B-10  
B-10  
DC Power Connections  
DTE Clock Rates  
Appendix C, Factory Default Settings  
Glossary  
C-1  
G-1  
xi  
 
Index  
I-1  
xii  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
List of Figures  
Figure 1-1 DL3800E Inverse Multiplexer (front panel)  
Figure 2-1 DL3800E Inverse Multiplexer  
Figure 2-2 Typical Application for DL3800E  
Figure 2-3 DL3800E Functional Schematic  
Figure 3-1 DL3800E Rear Panel  
1-1  
2-1  
2-3  
2-6  
3-2  
Figure 4-1 INVERSE MULTIPLEXER MAIN MENU  
Figure 4-2 ALARMS AND STATUS MENU  
Figure 4-3 STATISTICS MENU  
4-3  
4-5  
4-11  
4-12  
4-13  
4-16  
4-17  
4-18  
4-21  
4-21  
4-22  
Figure 4-4 NET STATISTICS MENU  
Figure 4-5 Additional NET STATISTICS  
Figure 4-6 EVENT HISTORY MENU  
Figure 4-7 CONFIGURATION MENU  
Figure 4-8 UNIT CONFIGURATION MENU  
Figure 4-9 DTE CONFIGURATION MENU (V.35)  
Figure 4-10 DTE CONFIGURATION MENU (RS449)  
Figure 4-11 DTE CONFIGURATION MENU (X.21)  
xiii  
 
Figure 4-12 DTE CONFIGURATION MENU (HSSI)  
Figure 4-13 Network Configuration Screen  
Figure 4-14 Network Thresholds Configuration  
Figure 4-15 SYSTEM UTILITIES MENU  
Figure 4-16 SOFTWARE DOWNLOAD MENU  
Figure 4-17 SOFTWARE UTILITIES MENU  
Figure 4-18 LOGIN CONFIGURATION MENU  
Figure 4-19 SNMP CONFIGURATION MENU  
Figure 4-20 TESTS MENU  
4-22  
4-26  
4-29  
4-30  
4-31  
4-36  
4-37  
4-39  
4-43  
4-45  
4-47  
5-1  
Figure 4-21 Loopbacks within the DL3800E unit  
Figure 4-22 MANUAL NETWORK RESTORATION MENU  
Figure 5-1 DL3800E Front Panel  
Figure 6-1 TESTS MENU  
6-2  
Figure B-1 DC Power Connections  
B-10  
xiv  
 
List of Tables  
Table 4-1 Main Menu  
4-4  
4-5  
Table 4-2 3800E Alarm Descriptions  
Table 4-3 NET Statistics Items  
4-13  
4-16  
4-18  
4-23  
4-26  
4-38  
4-40  
5-3  
Table 4-4 Alarm Level  
Table 4-5 Node Configuration Options  
Table 4-6 DTE Configuration Menu Options  
Table 4-7 Network Configuration Menu Options  
Table 4-8 Login Configuration Options  
Table 4-9 SNMP Configuration Options  
Table 5-1 Front Panel LEDs  
Table 5-2 Net Statistics Menu Information Display  
Table 5-3 Net Statistics Items  
5-9  
5-10  
5-18  
5-21  
5-29  
6-4  
Table 5-4 Configuration Menu Items  
Table 5-5 Node Configuration Menu Items  
Table 5-6 Net Threshold Options and Values  
Table 6-1 Troubleshooting  
xv  
 
Table B-1 COMM and NMS Port Pin Assignments  
B-1  
B-1  
B-2  
B-3  
B-4  
Table B-2 HSSI DCE Connector Pin Assignments  
Table B-3 V.35, M-34 to DB-25 DTE Cable Pin Assignments  
Table B-4 EIA-530, DB-25 to DB-25 DCE Conn. Pin Assignmts  
Table B-5 DB-25 to DC-37 Data Port Cable Pin Assignments  
Table B-6 RS-449, DC-37 to DB-25 DCE Cable Pin Assignments B-5  
Table B-7 Network Pin Assignments  
Table B-8 DB-25 to DE-9 Pinouts  
Table B-9 DB-25 to DB-15 Pinouts  
Table B-10 External Clock Pinouts  
Table B-11 Alarm Pinout  
B-6  
B-6  
B-7  
B-7  
B-9  
B-10  
C-1  
C-1  
C-2  
C-2  
C-2  
C-3  
Table B-12 DTE Clock Rates  
Table C-1 Unit Settings  
Table C-2 DTE Settings  
Table C-3 Network Settings  
Table C-4 Network Threshold Settings  
Table C-5 SNMP Configuration Settings  
Table C-6 Test Settings  
xvi  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Preface  
The DL3800E Inverse Multiplexer Users Guide provides the information  
you need to install, test, operate, and manage the DL3800E Inverse  
Multiplexer.  
AUDIENCE  
This guide is prepared for network managers and technicians who are  
responsible for the installation of LAN-to-WAN equipment, and who are  
thoroughly familiar with the network topology in which the DL3800E  
Inverse Multiplexer is expected to operate.  
ORGANIZATION  
Chapter 1, Quick Install Guide,” provides a concise installation procedure  
for most applications.  
Chapter 2, Introduction,” provides a description of the DL3800E Inverse  
Multiplexer system architecture, a discussion of features and benefits, and  
a sample application.  
Chapter 3, Installation,” provides guidelines for placing and securing the  
DL3800E Inverse Multiplexer in the operation site. Use this chapter to find  
out about command tools, system access, and basic configuration.  
Chapter 4, Terminal Interface,” shows how to monitor and manage the  
DL3800E Inverse Multiplexer using a VT100 terminal.  
Chapter 5, Front Panel Interface,” shows how to monitor and manage the  
DL3800E Inverse Multiplexer using the front panel.  
Chapter 6, Diagnostics” provides guidelines for troubleshooting the  
DL3800E Inverse Multiplexer.  
Appendix A, Specifications,” provides the electrical, physical, and  
networking characteristics of the DL3800E Inverse Multiplexer.  
Appendix B, Pinouts,” details connector and pin assignments for the  
DL3800E Inverse Multiplexer.  
Appendix C, Factory Default Settings,” lists factory defaults for the  
DL3800E Inverse Multiplexer.  
xvii  
 
CONVENTIONS  
This section describes the formats used to differentiate specific types of  
information throughout Quick Eagle Networks user guides.  
Symbols  
Symbols denote text that requires special attention. The information  
contained alongside a symbol corresponds to one of four levels of severity:  
NOTE: Follow guidelines in this, or the previous, paragraph to use the  
Quick Eagle Networks product more effectively.  
CAUTION: Follow guidelines in this, or the previous, paragraph to  
avoid equipment damage or faulty application.  
WARNING: Follow the instructions in this, or the previous, paragraph  
to avoid personal injury.  
ELECTRO-STATIC DISCHARGE CAUTION: Follow the instructions in  
this, or the previous, paragraph to avoid the discharge of static  
electricity, and subsequent damage to the equipment.  
xviii  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Typography  
Quick Eagle Networks manuals delineate the names of files, commands,  
and actions by using the fonts and typefaces described in the following  
table:  
Typeface or  
Symbol  
Purpose  
Example  
Courier  
Font  
AaBbCc123  
The names of commands, files, and  
directories, as well as on-screen  
computer output.  
Edit your.login file.  
Use ls -a to list all files.  
machine_name% You have  
mail.  
Courier  
Font, Bold  
AaBbCc123  
The input you provide, as contrasted  
with on-screen computer output.  
machine_name% su  
Keystrokes that you must provide to  
use the application.  
Press Ctrl-Lto refresh the screen.  
To delete a file, type rmfilename  
Palatino Font,  
Italic  
Command-line placeholder that you  
replace with a real name or value.  
AaBbCc123  
Book titles, new words or terms, or  
words that need to be emphasized.  
Refer to Chapter 6.  
These are called class options.  
You must be logged in as root to  
access this directory.  
M
Symbol that denotes a single-step  
procedure or task. Procedures  
requiring more than one task are  
numbered.  
Zapf Dingbats  
Font  
Palatino Font, Hyperlinks in the table of  
Bold Blue,  
Underscore  
AaBbCc123  
contents.When viewing the Portable  
Document Format (PDF) version of this  
user guide, you can click on one of  
these to jump directly to the selected  
subject matter.  
Palatino Font,  
Blue  
Hyperlinks throughout general text.  
AaBbCc123  
or  
AaBbCc123  
Helvetica Bold Denotes actual markings on front or  
Attach the cable to the TERMINAL  
port  
back panels.  
Preface  
xix  
 
QUICK EAGLE NETWORKS TECHNICAL SUPPORT  
If you should experience difficulty with the setup and/or operation of  
your Quick Eagle Networks equipment, the Quick Eagle Networks  
Technical Support staff can assist you at any time.  
Telephone  
FAX  
(408) 745-4200  
(408) 745-4240  
E-mail  
support@quickeagle.com  
www.quickeagle.com  
Internet  
RETURNING A UNIT  
Use the following procedure if you need to return a unit for service or  
repair,  
1. Contact the Quick Eagle Networks Customer Service Department  
at (408) 745-4200, or via e-mail at era@quickeagle.com, or fax a  
request to (408) 745-4240 to obtain an ERA (Equipment Return  
Authorization) number.  
2. Package the unit carefully and, before sealing the shipping carton,  
include any information you can provide about the problems you  
are currently experiencing with the unit.  
3. Attach an address label to the shipping carton. Be sure to include  
the ERA number:  
Customer Service Department  
Quick Eagle Networks  
217 Humboldt Court  
Sunnyvale, CA 94089  
ERA # ___________  
xx  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
SEND US YOUR COMMENTS  
Please let us know if this user guide manual meets your requirements.  
Does the manual answer your questions?  
Is the manual thorough?  
Is the manual easy to use; that is, can you find the information you need?  
Is anything missing from the manual?  
What would you like to see in the manual?  
Quick Eagle Networks Technical Publications  
FAX  
(408) 745-6250  
E-mail  
techpubs@quickeagle.com  
All suggestions and comments are appreciated.  
DOCUMENT CHANGE RECORD  
Date  
May 1996  
Issue Rev.  
Description  
Pages Affected  
A
Initial Release  
All  
All  
January 1999  
January 2000  
September 2000  
October 2000  
June 2001  
B
C
D
E
Update & Misc.  
Changes  
Update & Misc.  
Changes  
All  
All  
All  
All  
Update & Misc.  
Changes  
Update & Misc.  
Changes  
F
Update & Misc.  
Changes  
Preface  
xxi  
 
xxii  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Quick Install Guide  
1
1
PURPOSE  
This chapter is a quick reference for the setup and configuration of the  
DL3800E Inverse Multiplexer (see Figure 1-1). Please note that not all  
configuration items will be discussed, because this chapter only serves to  
get you up and running.  
Figure 1-1 DL3800E Inverse Multiplexer (front panel)  
CONFIGURATION  
Equipment Needed  
Terminal or PC, with DE-9 port, that will emulate an ANSI VT100  
DL3800E E1 Inverse Multiplexer product (various ports)  
The DL3000E comes either with BNC or 120 ohm  
DE-9 cable (plug-socket) 154-00050-01 (Model DL1081) or equivalent.  
DA-15 (plug) to RJ-48 (plug) for E1 connections 155-00011-01 (Model  
DL1033) or equivalent.  
HSSI or 155-10082-01 (HSSI) (Model DL1404-10) or equivalent  
M-34 to DB-25 cables (v. 35) or 155-00903-01 (v. 35) (Model DL1300-10,  
or equivalent  
DC-37 to DB-25 (RS-449) 155-00902-01 (RS449) (Model DL1302-10) or  
equivalent  
X.21+DB-25 (X.21) 155-00907 (DL1314-10) and 155-00907-12 (DL1314-50)  
(Model ID1314-10 and -50) or equivalent  
1-1  
 
1
Setup  
Terminal Log On  
Connect your terminal to the COMM port on the back of the DL3800E unit.  
Before you can log into the unit, you must make sure that terminal settings  
match the DL3800E. Defaults for the DL3800E unit COMM port: 9600  
baud, no parity, 8 bit word length, 2 stop bits. To log into the unit, first  
press Ctrl-xfive times (that is, hold down the control key on the  
keyboard and press the x key five times. This gives you the unit number.  
Now type Ctrl-x # Unit Number and press Returnor Enter. When  
prompted for user name and password press Returntwice, and the Main  
Menu on the DL3800E unit should appear. The default unit number is 0.  
Terminal Configuration  
Change only the configuration items listed below. Leave the other options  
at the factory default settings. To make a change, note that you must press  
the UP and DOWN ARROW keys to highlight the item, press the space bar  
until the desired option displays, then highlight CONFIRMand press Enter  
before exiting the menu.  
Unit Configuration  
Select Configuration from the Main Menu. Select Unit Configuration. Set  
the time and date. Set unit number other than zero. Select Confirm, then  
select EXITto go back to the CONFIGURATION MENU.  
DTE Configuration  
WARNING: V.35/RS449/X.21 will only work at a higher data rate  
with a DTE that can give terminal clocking, when in SCTE mode.  
Configure the DTE interface for either v.35/RS449/x.21or HSSI. For  
V.35/RS449/X.21 configuration, set the clock to SCTEand Normal TD/RD  
clock.Set the DTE loss condition for NONE. Select Confirm, then select  
EXITto go back to the CONFIGURATION MENU.  
1-2  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
1
Network Configuration  
Set up a port for each E1 line you plan to use. Set Alarmto Report. Set  
ACTICVE/RESTORE MODEto Use w/auto restore. Normally is CRC4  
enable. Primary clock Xmt=Network (assuming carrier or remote unit  
providing timing). Primary clock RCV should be set to AUTO. Configure  
SER to Immediate Confirm and select EXIT. Select Exit again to the Main  
Menu.  
Save Configuration  
Select SAVE CONFIGURATION from the Main Menu.  
Youre done! If you have any questions, please feel free to call Quick Eagle  
Networks Technical Support at (408) 745-4200.  
Quick Install Guide  
1-3  
 
1
1-4  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Introduction  
2
2
SYSTEM OVERVIEW  
The DL3800E Inverse Multiplexer bridges the gap between E1 and E3 data  
services by providing E1 multiplexing of multimegabit (up to Nx1.976  
Mbps) DTE data onto two to eight E1 circuits. The DL3800E Inverse  
Multiplexer is an economical solution to bandwidth intensive applications  
as it provides multimegabit data transport without the need for E3 circuits.  
The DL3800E unit is an ideal solution for applications such as LAN-to-  
LAN internetworking, bulk data transfer, video teleconferencing, and  
disaster recovery.  
Figure 2-1 DL3800E Inverse Multiplexer  
The inverse multiplexing technique employed by the DL3800E unit is  
completely transparent to the DTE application, as the multiple E1 circuits  
act as a single high-speed data link. The DL3800E unit can accept up to a  
31-millisecond differential delay between individual E1 circuits, thus  
providing the capability to accommodate E1 circuits from divergent paths.  
This is often the case with circuits being utilized from different carriers.  
An excessive delay alarm will cause an E1 line to be taken out of service. If  
the relative delay between all the E1 lines exceeds 31 milliseconds, then the  
E1 lines are removed from service one port at a time until the remaining  
group reside within the 31-millisecond window. The first port taken out of  
service will be the one that is farthest away from the average value,  
regardless of its relative delay value. In order to restore an E1 line, you  
must use the manual restore command. In order to bring an E1 line back  
into service, execute the manual restore command on the remote unit first.  
Then execute the manual restore command on the local unit. Auto restore  
will not work for lines removed due to excessive delay.  
The DL3800E unit supports either High Speed Serial Interface (HSSI) or  
V.35/RS449/X.21 interfaces to the DTE.  
2-1  
 
2
The DL3800E unit features an automatic rate fallback in the event of a  
failing E1 circuit. If the performance of an E1 circuit is detected to be  
falling below accepted levels, the DL3800E unit automatically removes the  
E1 from service, and throttles back the DTE to a data rate corresponding to  
the remaining E1s. When the alarm condition on the affected E1 has been  
cleared, the DL3800E unit can automatically restore the E1 and data rate.  
You can configure, control, and monitor the DL3800E unit through the  
front panel, an ASCII terminal (locally or remotely via a modem or  
remotely in-band) or a Simple Network Management Protocol (SNMP)  
management station. The remote DL3800E unit can be managed in-band  
using overhead in all active connections as the communications path. The  
DL3800E unit features an integrated SNMP agent which supports the E1  
Management Information Base (MIB) in addition to a unit specific  
enterprise MIB.  
A downloadable software feature of the DL3800E unit allows new features  
and functionality to be added to the unit on line (without interrupting the  
data) via the unit's built-in communications port, or via a selected E1  
connection.  
PRODUCT FEATURES  
The DL3800E Inverse Multiplexer allows you to connect high-speed data  
terminal equipment (DTE) to multiple E1 links, providing aggregate data  
rates up to 15.808 Mbps. Utilizing up to eight E1 links simultaneously, the  
DL3800E unit is ideally suited to high bandwidth applications such as  
LAN-to-LAN internetworking, video teleconferencing, bulk data transfer  
and high-speed data recovery.  
System Features  
High bandwidth data transmission over 1 through 8 E1 ports.  
HSSI or V.35/RS449/X.21 DTE interface  
Automatic Bandwidth response/recovery  
Local or remote management via front panel, terminal, or embedded  
SNMP agent  
Extensive diagnostics:  
Front panel indicators  
Built-in test loops  
Automatic self test  
Integral event log with nonvolatile memory  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
2
System Benefits  
The numerous features of the DL3800E unit provide you with many  
benefits:  
Reliable, full performance access to E1 networks for the widest variety  
of DTE products  
Enterprise wide visibility via SNMP  
Local and remote access via front panel, terminal, or telnet  
Complete maintenance and diagnostic support via exhaustive alarm,  
statistic, and test capabilities  
Downloadable code provides for on-line upgrade to the DL3800E unit  
software for both major and minor feature enhancements  
Application  
The DL3800E unit accepts data from a high-speed bridge, router, front-end  
processor or other DTE device and multiplexes the bit stream onto one  
through eight E1 circuits for transmission at N x 1.976 Mbps. Because the  
inverse multiplexing process is completely transparent to the attached  
equipment, the combined E1 circuits appear as a single high-speed data  
link to the DTE. The DL3800E unit accepts up to a 31-millisecond  
differential delay between individual E1 circuits, ensuring reliable  
operation in multiple carrier networks.  
A unique feature of the DL3800E unit is the automatic bandwidth response  
to an E1 signal loss or network errors. If an E1 link falls below acceptable  
performance levels, the DL3800E unit removes the link from service and  
reduces the DTE data rate to correspond with the remaining E1 links in  
service. When the alarm condition has been cleared, the DL3800E unit  
restores the E1 link and increases the DTE data rate to its original level.  
A typical application is shown in Figure 2-2.  
Figure 2-2 Typical Application for DL3800E  
Introduction  
2-3  
 
2
FUNCTIONAL DESCRIPTION  
The base DL3800E unit configuration consists of a motherboard with two  
(E1) network interface connectors and the DTE connectors (HSSI and  
V.35/RS449/X.21). Six additional E1 network ports can be added with the  
addition of from one to three daughterboards, each daughterboard  
supporting two additional E1 ports.  
The general operation of the DL3800E unit is explained in the following  
paragraphs which describe the signal flow and overhead functions.  
Signal Flow  
The DL3800E unit is configured by you for the number of E1 signals to be  
used for transmission. The DL3800E unit will provide a smooth clock to the  
DTE at the data rate required for the number of E1 outputs you have  
configured. For E1, this rate will be Nx1.976 Mbps, where N is the number  
(1 to 8) of E1s to be used.  
The transmit smooth clock PLL can use any of the incoming E1 clocks, an  
external clock, or internal clock as reference. The receive smooth clock will  
use one of the receive clocks at its source. The smooth clock VCO will be  
divided down to 8 kHz to be phase compared to the 8 kHz reference. The  
receive buffers are large enough to accommodate variations between E1  
receive clocks.  
The DL3800E unit supports one DTE interface. For data rates up to 6 Mbps,  
the DTE interface can be HSSI or V.35/RS449/X.21 (software selectable).  
For data rates over 6 Mbps, only the HSSI interface will be supported.  
Data is sent from the DTE interface to an Inverse Multiplexer (IMUX)  
transmit framer. A 16-bit proprietary framing pattern is defined to satisfy  
the requirements of inverse multiplexing communications. This frame is  
constructed by using one payload bit in each frame for 16 consecutive  
frames. For E1, the inverse multiplexing frame is the first bit after the  
framing bit.  
From the inverse mux framer, the data is sent to all E1 framers, where the  
E1 framing is added, and then to the appropriate E1 network interface and  
out over the E1 network.  
All incoming configured E1 lines, with their respective clocks, are received  
into a standard E1 framer. The output of the E1 framer is fed into the IMUX  
framer.  
Data coming into the DL3800E Inverse Multiplexer is stored in N  
independent buffers, where N is the number of configured input channels.  
From these buffers, the data will be read and IMUX framing removed.  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
2
When the incoming signal is framed on the inverse mux frame, the framer  
will start loading its Dual Port RAM. The address to the Dual Port RAM is  
derived from the 16-bit inverse mux frame. The software will ask all  
framers to latch their Dual Port RAM addresses at the same time, and by  
looking at the addresses, the software can determine which network has  
experienced the greatest delay.  
From the receive inverse IMUX framer, the incoming data will go to the  
receive multiplexer. The net that is last in time will be enabled to tell the  
receive multiplexer when to start unloading the Dual Port RAM to the DTE  
interface. To allow for jitter and wander specifications, the read address  
counter will be positioned approximately three frames behind the write  
address for the network last in time.  
E1 Port Crossover Detection  
When the IMUX E1 circuits synchronize, they use the IMUX framing to  
communicate to know the ports (1-8). A crossover is a situation where a  
network line is connected to a port on the remote 3800E different from the  
port it originates from on the local 3800E.(e.g. port 1 on the local unit is  
connected to port 2 on the remote unit). This situation will cause DTE  
traffic to be incorrectly multiplexed and, as a result, severely errored.  
When a crossover is detected, the DL 3800E removes the crossed port from  
the DTE data bundle and reduces the DTE data rate. The LED will change  
to flashing green and the port status in the Alarms & Status menu read  
Line crossed, and also (Crossed to port:x), where x is the port number  
connected at the remote end. It also generates an SNMP alarm:  
enCrossoverAlarm.  
When the crossover is cleared, the port is restored to DTE bundle and the  
LED restores to green. Port crossover status clears and the SNMP alarm  
enCrossoverAlarm is idled.  
An IMUX E1 circuit is reestablished as soon as the mismatched circuits are  
disconnected and reconnected properly.  
Figure 2-3 is a functional schematic of the DL3800E unit showing a unit  
supporting four E1 lines.  
Introduction  
2-5  
 
2
E1 Framer  
E1 Framer  
E1 Framer  
E1 Framer  
E1 TX Int.  
E1 TX Int.  
E1 TX Int.  
E1 TX Int.  
T
X
F
TX_  
DTE  
INTF  
TX LCA  
IMUX Framer  
I
F
O
E1 Framer & RX Int.  
E1 Framer & RX Int.  
E1 Framer & RX Int.  
E1 Framer & RX Int.  
IMUX Buffer  
IMUX Buffer  
IMUX Buffer  
IMUX Buffer  
IMUX Framer  
IMUX Framer  
IMUX Framer  
IMUX Framer  
R
X
F
RX_  
DTE  
INTF  
RX  
LCA  
I
F
O
Figure 2-3 DL3800E Unit Functional Schematic  
Overhead Functions  
The overhead functions consist of a controller, front panel, two RS232  
communication interfaces (terminal and network management), and a  
power supply.  
The controller function is performed by a microprocessor on the main  
board. The controller collects E1 statistics. It also processes E1 alarms and  
performance monitoring information, as well as supporting unit  
configuration, test and maintenance activities. Finally the Controller block  
supports the front panel display, terminal port, and SNMP port interfaces.  
The front panel consists of a 16-character vacuum fluorescent display,  
4-key keypad, and LEDs. This panel can be used to provision the unit, run  
diagnostic tests, or access performance statistics.  
The serial ports are RS-232C compatible ports with one port supporting a  
menu driven ASCII terminal interface, and the other port providing access  
to the built-in SNMP agent functionality.  
The DL3800E unit can be ordered with DC or AC power supplies and the  
built-in power supply has a range of 110 to 240 VAC and -40 to -75 VDC.  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Installation  
3
3
INSTALLATION  
NOTE: Before beginning the installation process, inspect the DL3800E  
unit for damage which may have occurred during shipment. If damage  
has occurred, notify Quick Eagle Networks and your package carrier  
immediately.  
1. Unpack and inspect the DL3800E unit for damage that might have  
occurred during shipment. If necessary, wipe off the exterior with  
a soft cloth. Save all packing slips and papers that come with the  
unit. Save the shipping cartons and packing materials until  
installation is complete and proper operation is verified.  
2. Verify that all items ordered are included in the shipment. The  
shipment should consist of the following:  
DL3800E Digital Inverse Multiplexer  
DL3800E Users Guide (this manual).  
Appropriate data and network interface cables and connectors (if  
ordered).  
Power cord  
3. Mount the DL3800E unit.  
See Mountingon page 3-2.  
4. Connect Power Cables and Connections.  
See Power Cables And Connectionson page 3-3  
5. Connect network cables to the DL3800E unit.  
See E1 Network Connectionon page 3-5  
6. Connect the DTE cable to the DL3800E unit.  
See DTE Cable And Connectionon page 3-5  
7. ASCII Terminal and SNMP Connection  
See ASCII Terminal and SNMP Connectionon page 3-6  
3-1  
 
3
8. Configure Unit  
See Unit Configurationon page 4-17 (ASCII terminal)  
a. Configure COMM PORT  
See Unit Configurationon page 4-17 (ASCII terminal)  
b. Configure NMS (Network Management) Port  
See SNMP Configurationon page 4-39 (ASCII terminal)  
9. Configure Network  
See Network Configurationon page 4-25 (ASCII terminal)  
10. Configure DTE  
See DTE Configurationon page 4-20 (ASCII terminal)  
MOUNTING  
Rack Mounting  
The DL3800E unit (Figure 3-1) is shipped with mounting ears for a 19- or  
23-inch rack that are mounted for use with a 19-inch rack.  
Desk Operation And Stacking  
Four stick-on rubber feet are supplied with each DL3800E unit. Remove the  
covering and stick them onto the DL3800E unit bottom. You can now stack  
units as required on a flat surface in a well-ventilated, secure area.l  
Figure 3-1 DL3800E Rear Panel  
NOTE: On DC versions of the DL3800E, the AC receptacle will be  
covered with a DC face plate.  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
3
POWER CABLES AND CONNECTIONS  
The DL3800E unit can be ordered with an AC or DC power supply.  
AC Power Connection  
An AC power cord is supplied with the DL3800E -AC-XXX to provide 120  
to 240 VAC power. The power cord receptacle is located on the rear panel  
of the DL3800E-AC-XXX. For AC power, connect the AC power cord to the  
DL3800E-AC-XXX, and plug into the nearest AC outlet.  
DC Power Connection  
The Quick Eagle Networks DL3800E Inverse Multiplexer can also be  
powered by a -48 VDC power source. The DC power connection on the  
DL3800E is located on the back panel. There are eight screw terminals  
located on the rear panel. The two screw terminals on the far right (looking  
at the rear panel) are for DC power.  
Connect the -48 V wire to the screw terminal labeled . Attach the 48 V  
Return(+) wire to the screw terminal to the immediate right, labeled +.  
Connect earth ground to the ground stud.  
When using DC power, you will need the following:  
A tray cable which must be UL recognized 14 AWG, 3 conductors,  
copper strand.  
Electrical power and control cable type TC, 600 V 90°C. (Alpha Wire  
Company No. 45443 is an example.)  
To mechanically install the DL 3800E when using DC power, perform the  
following steps:  
1. Place the DL3800E unit on a flat surface or in a rack.  
2. Before you connect the DL3800E unit to the centralized DC power  
source, strip 2.0 inches of jacket material off the tray cable and  
0.5 inch of insulation off each wire.  
3. Connect the -48 VDC wire to the - terminal (on the rear panel’s  
terminal block, using a small flat screw driver (¼-inch blade) to  
fasten the wire.  
Installation  
3-3  
 
3
4. Connect the ground (+) wire to the + terminal in the same way.  
NOTE: The unit is designed to operate with negative voltage;  
therefore, you must connect the positive terminal to ground.  
5. Connect the frame ground terminal to the local earth ground, if  
required.  
6. To minimize disturbance to the wires through casual contact,  
secure a tray cable near the rack frame using multiple cable ties.  
Use at least four cable ties, a minimum of four inches apart. The  
first tie should be within six inches of the terminal block.  
7. Connect the DL3800E unit to a DC power source.  
WARNING: Damage to the DL3800E unit may result if power is  
connected improperly. Do not operate the DL3800E unit without a  
ground connection to the ground stud.  
The DL3800E unit automatically runs a self-test at power up, during  
which the front panel displays a self-test message. Payload service resumes  
upon completion of the self-test and the front panel displays the following  
default message:  
EFS 00.0 PERCENT  
WARNING: Do not operate the DL3800E unit without an earth  
ground connection to the ground stud.  
The DL3800E unit is designed to operate with a negative power supply.  
This means the positive terminal is connected to the ground.  
WARNING: Damage to the DL3800E unit may result if power is  
connected improperly.  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
3
E1 NETWORK CONNECTION  
The eight port connector can be either a DB-9, DB-15, or BNC. The  
connectors are located on the DL3800E unit back panel for connecting to  
the E1 networks.  
Connect the DL3800E unit to each E1 Network using the appropriate cable  
and connectors, available from Quick Eagle Networks.  
DTE CABLE AND CONNECTION  
DTE interface connectors are provided on the back of the DL3800E, a  
50-pin SCSI socket receptacle for HSSI compatible DTE, and a DB-25  
(E1A-530) socket connector for V.35/X.21 or RS-449 compatible DTEs.  
If using a HSSI interface, the cable connecting the DL3800E unit to the DTE  
consists of 25 twisted pairs with an overall foil/braid shield. The DL3800E  
unit end of the cable should have a plug connector. One 50-pin SCSI socket  
receptacle is provided on the rear of the DL3800E unit to connect it to  
HSSI-based networks/systems. Cables and connectors are available from  
Quick Eagle Networks. Using the appropriate cable and connectors,  
connect the DL3800E-HSSI connector to the HSSI DTE.  
If using a V.35/X.21 interface, use a shielded cable supplied by Quick Eagle  
Networks to connect the DL3800E unit to the DTE. One DB-25 (E1A-530)  
socket connector is provided on the back of the DL3800E unit to connect  
the DL3800E to the V.35/RS-449/X.21 compatible DTE. Using the  
appropriate cable and connectors, connect the V.35/RS-449/X.21 DTE  
device to the DL3800E unit.  
ASCII TERMINAL AND SNMP CONNECTION  
The DL3800E unit is accessed by an ASCII terminal or SNMP Management  
System workstation through direct, daisy-chained, or dial-up modem  
connection.  
On the rear panel of the DL3800E unit, two socket DE-9 receptacles labeled  
NMS and COMM PORT are provided for connection to the SNMP  
workstation or ASCII terminal, respectively. An RS-232 straight cable, with  
DE-9 plug connectors, is used to link the DL3800E unit with the terminal,  
modem, or workstation.  
Installation  
3-5  
 
3
Direct Connection  
For direct connection, using the appropriate DE-9 cable, connect the ASCII  
terminal or SNMP workstation to the DL3800E unit through the Terminal  
or SNMP connector on the back of the rear panel. The baud rate, parity bit,  
and stop bit settings must match those of the terminal: baud rate, 9600;  
eight bits, no parity and two stop bits.  
Modem Connection  
When using a modem, the baud rate, parity bit, and stop bit settings of the  
modem must match the terminal or workstation port default settings: baud  
rate 9600; eight bits; no parity, and two stop bits. If these parameters are  
not the same, reconfigure the unit default settings using the front panel  
controls.  
When the parameters of the modem and the terminal or workstation port  
coincide, using the RS-232 straight cable, connect the modem to the  
appropriate RS-232 comm port (COMM PORT or NMS) on the rear panel of  
the DL3800E. Then, connect the modem to the phone line and the ASCII  
terminal or SNMP workstation. DE-9 to DB-25 adapters and null-modem  
adapters are available from Quick Eagle Networks. Specify a plug or socket  
terminal connection when ordering.  
For direct connection, the terminal, workstation, or modem may be placed  
up to 15 meters away from the comm port when operating at 9600 baud.  
Distances may be increased if the baud rate is reduced.  
Telnet Connection  
For a telnet connection, connect a device that provides a SLIP connection to  
the NMS port of the DL3800E unit. Examples include a terminal server,  
router auxiliary port, or the Quick Eagle Networks Management Access  
Processor (MAP). Be sure to provide a valid IP address to the DL3800E.  
There can be up to two active telnet sessions at any given time. There is no  
way for a user to delete the telnet session of another user.  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
3
Daisy Chaining  
Multiple DL3800E units can be daisy-chained together through the  
Terminal Port to provide centralized network monitoring and management  
capabilities.  
A ribbon-type cable with DB-9 connectors is available from Quick Eagle  
Networks for daisy-chaining your DL3800E units. You can order specific  
cables to daisy-chain four units (Part No. 154-00051-01), eight units  
(Part No. 154-00052-01), or twelve units (Part No. 154-00053-01). To place an  
order, contact the Quick Eagle Networks Sales Department at (408) 745-  
6200.  
If using a cable other than the above, see Terminal Connectionon page  
B-1 for Terminal Port pin assignments. With this cable, CTS (pin 8) must be  
connected between DL3800E units, but must not be connected to the  
terminal.  
The one socket connector on the ribbon is to be connected to the terminal  
or modem (if a remote site). The remaining plug DE-9 connectors are  
connected to the DL3800E1 unit port. Each unit must be assigned a unique  
node number.  
When units are daisy-chained together, the local terminal must be  
operating in Multidrop Mode. Each unit should be given a unique Node  
Number.  
NOTE: For detailed instructions on installing SNMP systems, refer to  
the separate installation guides for these products.  
Installation  
3-7  
 
3
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Terminal Interface  
4
4
LOG IN/LOG OFF  
Each DL3800E unit is equipped with an integrated RS-232 ASCII user  
interface that can be accessed through the COMM PORT (DE-9 connector)  
located on the rear panel of the DL3800E. Through this interface, you can  
perform various functions described in this section.  
When operating in multidrop mode (that is, when multiple DL3800E units  
may be daisy-chained together for centralized network management), you  
must log in to establish communication with a single unit on the network.  
Only one unit may be accessed at a time. All units continuously monitor  
the line, but only the unit which is logged on will respond to terminal  
commands. When no unit is logged on, the characters typed on the  
terminal will not show up on the display screen.  
To log on and log off a particular unit, follow these procedures:  
1. Type five Ctrl-Xcommands in a row to return a roll callof all  
Node Numbers on the chain.  
This feature is useful when the Node Numbers of any units on the  
network are unknown.  
2. Type Ctrl-Xfollowed by #, the node number, and press Enter(or  
Return).  
These characters will not be displayed on the terminal screen, but  
the units will receive them.  
If passwords are enabled for the unit, you will be prompted for the  
username and password. Initially, no password or username is  
needed, so simply press Enterwhen prompted for a username or  
password.  
3. The Main Menu will appear. If not, check that the Node Number  
matches what is typed on the terminal.  
If it still does not appear, check that the DL3800E unit port settings  
match the terminal settings (baud rate, parity, data bits, and stop  
bits). If so, a null modem adapter may be required to interchange  
pins 2 and 3 (transmit and receive) from the terminal.  
4-1  
 
4
4. To log on to another DL3800E unit on the same daisy chain,  
simply type Ctrl-X, followed by a # and the Node Number and  
press Enter.  
The previous unit is logged out and the new unit is logged on.  
5. To log off all units without logging onto any new units, press  
Ctrl-Xat the Main Menu.  
TERMINAL OPERATION OVERVIEW  
General Menu Flow  
The menu interface for the DL3800E unit consists of the Main Menu, and a  
series of submenus.  
From the Main Menu, select the submenu to be selected or function to be  
performed by moving the highlight bar through the menu screen with the  
Cursor Arrow keys until the desired function is highlighted.  
To prevent any accidental data and/or status change, every proposed  
change requires a confirmation response. To confirm a proposed change,  
move the highlight bar to Confirm on the menu and press Enter. Type any  
other key and the change will not be made. This will cause the terminal to  
continue to prompt you to confirm the change(s). To abort the change,  
move the highlight bar to Exit, and press the Enterkey rather than  
confirming the change.  
NOTE: Pressing the Escape key brings the display back to Select  
Local/Remote when in the Main Menu, and back to Exit when in the  
EXECUTION MENU.  
Screen Description  
The top four lines of each display screen contain information regarding the  
last two status or alarm conditions reported by the DL3800E unit. This  
information includes: the severity of condition reported; the date and time  
condition was reported; the Unit and NET (E1 port) reporting the alarm; a  
code for the type of condition, and a description of the condition.  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
The next two lines in the menu, which are always highlighted, represent  
the Status Bar. The first line of the Status Bar displays the product type, the  
software release number, node number, node name, date & time, and  
current alarm status of the unit. The second line displays the selected  
device address and name.  
Major 01/01/90 04:58:17 Unit: 0  
Network 15 Minute UAS Major Threshold Exceeded  
Major 01/01/90 04:58:17 Unit: 0 NET : 1 (114)  
Network 15 Minute UAS Major Threshold Exceeded  
NET : 2 (114)  
Digital Link DL3800E  
SR 3.00.00 NODE 7: 01/01/90 05:55:07 MN  
SELECTED DEVICE ADDRESS:  
7.00.000 NAME:  
INVERSE MULTIPLEXER MAIN MENU  
Select Local/Remote  
Alarms & Status  
Statistics  
Event History  
Configuration  
System Utilities  
Tests  
Manual Network Restoration  
Logout  
Figure 4-1 INVERSE MULTIPLEXER MAIN MENU  
The product type is a DL3800E Digital Inverse Multiplexer.  
The software revision is 3.XX, where xx equals the latest software revision.  
This number is useful to determine the features that are supported with  
this release.  
The Node number, in this case 7, is user defined. This can be used to  
further identify the node within your network. It is recommended that all  
nodes be given a unique node number. This is crucial in inter-node  
communications.  
The Node name (HOME), is user defined. You can use this field to uniquely  
describe the node within the network.  
The date and time are give in mm/dd/yy, and hh:mm:ss format.  
The alarm indicator, in this case MN for minor, is given on each screen to  
alert you of a local Node alarm.  
The Selected Device address, in this example 7.00.000is shown at the  
beginning of the second status line. A device is a generic term to indicate a  
NODE (unit).  
Terminal Interface  
4-3  
 
4
INVERSE MULTIPLEXER MAIN MENU COMMANDS  
When a DL3800E unit is first powered up, the Main Menu (Figure 4-1 on  
page 4-3) appears on the terminal screen. This describes those functions  
that can be performed, parameters viewed, changed and/or deleted from  
this menu. The INVERSE MULTIPLEXER MAIN MENU items are shown  
in Table 4-1 (these items are described in more detail in the following  
sections)..  
Table 4-1 Main Menu  
Menu  
Description  
Select Local/Remote  
Allows you to move between the Main Menu of the Local and Remote  
units.  
Alarms and Status  
Provides current alarm and status report of the common equipment, DTE,  
and E1 lines.  
Statistics  
Allows you to access the STATISTICS MENUS of the various E1 lines.  
Allows user to view and clear alarms and event history of the DL3800E.  
Event History  
Configuration  
Allows you access submenus to configure certain parameters of the  
DL3800E, network, and DTE.  
System Utilities  
Allows you to perform various system utility functions such as download  
software, configure SNMP, configure login, and delete or save  
configuration.  
Tests  
Allows you to initiate diagnostic loopbacks.  
Manual Network Restoration Allows you to manually restore a E1 circuit instead of it being restored  
automatically upon the clearing of a problem.  
Logout  
Allows you to log out of the DL3800E unit without having to wait for  
automatic logout.  
SELECT LOCAL/REMOTE  
When in the INVERSE MULTIPLEXER MAIN MENU, this option allows  
you to view and access the other items on either the local or remote  
DL3800E. The Device Address and Name in the header portion of the  
display screen will identify the unit that the terminal is presently  
communicating with.  
To move to the Main Menu of the other DL3800E, highlight SELECT  
LOCAL/REMOTE and press Enter. The Device Address and Name in the  
header should change to the new unit as shown in Figure 4-1 on page 4-3.  
4-4  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
ALARMS AND STATUS  
The ALARMS AND STATUS MENU is a view-only screen that allows you  
to review the current ALARMS AND STATUS items being reported by the  
DL3800E. To access this screen, move the highlight bar in the INVERSE  
MULTIPLEXER MAIN MENU to ALARMS AND STATUS and press  
Enter.  
The ALARMS AND STATUS display (Figure 4-2) will appear on the screen  
describing the status of the common equipment and each of the E1 ports  
(lines), plus the status of the DTE leads and the current rate of the DTE  
port.  
Major 01/01/90 04:58:17 Unit:  
Network 15 Minute UAS Major Threshold Exceeded  
Major 01/01/90 04:58:17 Unit: NET : 1 (114)  
Network 15 Minute UAS Major Threshold Exceeded  
Digital Link DL3800E SR 2.00.00 NODE 7: 01/01/90 05:55:07 MJ  
SELECTED DEVICE ADDRESS: 7.00.000 NAME:  
0
NET : 2 (114)  
0
CURRENT ALARMS AND STATUS ITEMS  
Exit Repeat  
Common equipment status: No Ext Clk, Primary Clk, No Net Sync  
Network ports:  
PORT 1: LOS, RED, Active, OOF MN, UAS 15 MIN MJ Relative delay of 0.000 ms  
PORT 2: LOS, RED, Active, OOF MN, UAS 15 MIN MJ Relative delay of 0.000 ms  
PORT 3: BPV MN, OOF MN, BPVS 15 MIN MN  
PORT 4: BPV MN, OOF MN, BPVS 15 MIN MN  
PORT 5: LOS, RED, UAS 15 MIN MJ  
PORT 6: LOS, RED, UAS 15 MIN MJ  
PORT 7: LOS, RED, UAS 15 MIN MJ  
PORT 8: LOS, RED, UAS 15 MIN MJ  
RS449/X.21 port: DSR ON  
Current RS449/X.21 port rate = 3.952 Mbits/sec  
Figure 4-2 ALARMS AND STATUS MENU  
Following are the Alarm and Status items (severity) that may appear. The  
Common Equipment alarms and status will appear first, followed by the  
Network and the DTE alarms and status.  
Table 4-2 3800E Alarm Descriptions  
ALARM  
NETWORK  
DESCRIPTION  
LOS  
Loss of Signal -- Net Port does not detect  
any E1 pulses  
LOF  
Loss of Frame - Net Port does not detect a  
valid E1 framing format  
Terminal Interface  
4-5  
 
4
Table 4-2 3800E Alarm Descriptions  
ALARM DESCRIPTION  
AIS DET  
Alarm Indication Signal Detected Net  
Port detects an unframed continuous  
stream of binary ones.  
AIS  
Alarm Indication Signal Not used.  
YEL Det  
Yellow Alarm (RAI Remote Alarm  
Indication) Detected. #Net Port detects the  
presence of an RAI.  
YEL  
Yellow Alarm (RAI) - Net Port transmits a  
Yellow Alarm (RAI) when receiving an AIS,  
LOS, or LOF.  
Failed Signal  
Xmt Failed  
Not used.  
Not used.  
User Line Lpbk  
User Line Loopback Net Port in a Line  
Loopback. Enabled by you under the Tests  
menu.  
User Payload Lpbk  
User Payload Loopback Net Port in a  
Payload Loopback. Enabled by you under  
the Tests menu.  
HW Line Lpbk  
HW Payload Lpbk  
Remote Lpbk  
Not used.  
Not used.  
A loopback is occurring on the net lines or  
on the remote unit.  
*Active  
Net Port is Active. This indicates that the  
Net Port is part of the bundle passing data  
to and from the DTE port.  
Not Active  
Net Port is Inactive. This indicates that the  
Net Port has been removed from the  
bundle and is no longer passing data to  
and from the Data Port.  
Excessive Delay  
The Net Port has exceeded the 31ms  
relative delay.  
Set Code Detected  
Reset Code Detected  
CRC Threshold  
The Net Port has detected a Loop code  
sent from the Network.  
Net Port has detected a Loop down code  
sent from the Network.  
Net Port has exceeded the CRC Threshold.  
4-6  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Table 4-2 3800E Alarm Descriptions  
ALARM DESCRIPTION  
SES Threshold  
Net Port has exceeded the Severely  
Errored Second Threshold.  
UAS Threshold  
Net Port has exceeded the Unavailable  
Second Threshold.  
BPV MN/MJ  
Net Port has declared a Bipolar Violation  
Major or Minor Alarm.  
OOF MN/MJ  
Net Port has declared an Out Of Frame  
Major or Minor Alarm.  
BPVs 15 Min. MN/MJ  
CRCs 15 Min. MN/MJ  
ES 15 Min. MN/MJ  
SES 15 Min. MN/MJ  
UAS 15 Min. MN/MJ  
BPVs 24 Hr MN/MJ  
CRCs 24 Hr MN/MJ  
ES 24 Hr MN/MJ  
SES 24 Hr MN/MJ  
UAS 24 Hr MN/MJ  
Net Port has declared a Bipolar Violation  
15 minute Major or Minor Alarm  
Net Port has declared a CRC 15 minute  
Major or Minor Alarm  
Net Port has declared a Errored Second  
15 minute Major or Minor Alarm  
Net Port has declared a Severely Errored  
Second 15 minute Major or Minor Alarm.  
Net Port has declared a Unavailable  
Second 15 minute Major or Minor Alarm.  
Net Port has declared a Bipolar Violation  
24 Hour Major or Minor Alarm.  
Net Port has declared a CRC 24 Hour  
Major or Minor Alarm.  
Net Port has declared a Errored Second  
24 Hour Major or Minor Alarm.  
Net Port has declared a Severely Errored  
Second 24 Hour Major or Minor Alarm.  
Net Port has declared a Unavailable  
Second 24 Hour Major or Minor Alarm.  
COMMON EQUIPMENT  
External Alarm  
An External Alarm has been detected. This  
alarm is based on the External Alarm  
contacts on the back panel.  
Proc Restart  
Unit has rebooted.  
RAM Test Fail  
This occurs if the units RAM does not pass  
the memory test which occurs at startup.  
Terminal Interface  
4-7  
 
4
Table 4-2 3800E Alarm Descriptions  
ALARM  
DESCRIPTION  
ROM Checksum Fail  
This occurs if the checksum for the code  
image stored in ROM does not match that  
expected.  
No Ext Clk  
No clock detected on the External Clock  
DB-- 9 connector on the back panel.  
Primary Clock  
Secondary Clk  
The set primary receive clock source is  
now providing the network receive clock.  
The set secondary receive clock source is  
now providing the network receive clock.  
(Occurs if the primary source has been  
lost).  
Internal Clk  
Sync  
Loss of Internal Clock.  
Net 1 -- Net Port 1 is the network receive  
clock source.  
Sync  
Net 2 -- Net Port 2 is the network receive  
clock source.  
Sync  
Net 3 -- Net Port 3 is the network receive  
clock source.  
Sync  
Net 4 -- Net Port 4 is the network receive  
clock source.  
Sync  
Net 5 -- Net Port 5 is the network receive  
clock source.  
Sync  
Net 6 --- Net Port 6 is the network receive  
clock source.  
Sync  
Net 7 -- Net Port 7 is the network receive  
clock source.  
Sync  
Net 8 -- Net Port 8 is the network receive  
clock source.  
No Net Sync  
Shows all port are down. More  
specifically, if a network clock cannot be  
sourced from any port.  
DTE  
HSSI Channel Lpbk  
User Lpbk  
A HSSI hardware loopback has been set.  
The DTE/Network loopback has been set.  
A V.35 hardware loopback has been set.  
V.35 LT Lpbk  
4-8  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Table 4-2 3800E Alarm Descriptions  
ALARM DESCRIPTION  
DTE Loss  
The signal indicating DTE presence has  
been lost.  
DTR On  
RTS On  
RLB On  
The V.35 DTR signals is present.  
The V.35 RTS signal is present.  
The V.35 DTE Remote Loopback signal has  
been set.  
LT On  
The V.35 LT signal is present.  
The HSSI TA signal is present.  
The HSSI LA signal is present.  
The HSSI LB signal is present.  
The V.35 DSR is asserted.  
The V.35 CTS signal is asserted.  
The V.35 RLSD signal is asserted.  
The V.35 TM signal is asserted.  
The HSSI CA signal is asserted.  
Not used  
TA On  
LA On  
LB On  
DSR On  
CTS On  
RLSD On  
TM On  
CA On  
LC On  
Line crossed  
E1 network lines are crossed.  
Terminal Interface  
4-9  
 
4
NOTE: Status display will read ACTIVE, if the DL3800E unit is in  
Inverse Mux mode and receiving I-Framing on the E1 without Blue,  
Yellow, or Red Alarms or Major Alarm Thresholds being exceeded.  
If the E1 Network Configuration is set to NEVER USE and a good E1  
is connected, the Alarm & Status display will read NOT USED.  
In Single DSU Mode, the DL3800E unit is Active if it is receiving  
valid E1 pulses from the network without Blue, Yellow, or Red Alarms  
or Major Alarm Thresholds being exceeded and 1) if, in HSSI mode,  
the TA must be asserted or 2) if, in non-HSSI mode, you must select  
DTR or RTS.  
A Blue, Yellow, or Red Alarm or the exceeding of Major Alarm  
Thresholds will cause the E1 to be taken out of service.  
4-10  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Statistics  
This menu allows you to access the performance STATISTICS SUBMENU  
of any E1 port. Highlight STATISTICS in the INVERSE MUX MAIN  
MENU, and press the Enterkey. The STATISTICS MENU appears  
(Figure 4-3).  
Major 01/01/90 04:58:17 Unit:  
Network 15 Minute UAS Major Threshold Exceeded  
Major 01/01/90 04:58:17 Unit: NET : 1 (114)  
Network 15 Minute UAS Major Threshold Exceeded  
0
NET : 2 (114)  
0
Digital Link DL3800E  
SELECTED DEVICE ADDRESS:  
SR 2.00.00 NODE 7: 01/01/90 05:55:07 MJ  
7.00.000 NAME:  
STATISTICS MENU  
Exit  
NETWORK 1 STATISTICS  
NETWORK 2 STATISTICS  
NETWORK 3 STATISTICS  
NETWORK 4 STATISTICS  
NETWORK 5 STATISTICS  
NETWORK 6 STATISTICS  
NETWORK 7 STATISTICS  
NETWORK 8 STATISTICS  
Figure 4-3 STATISTICS SUBMENU  
Terminal Interface  
4-11  
 
4
To view the performance statistics of any one E1 port, highlight that port  
and press Enter. The NET STATISTICS for that port (Figure 4-4) will  
appear on the screen.  
Figure 4-4 NET STATISTICS MENU  
This screen displays the selected ports E1 performance statistics for the  
current 15-minute interval and for the past 48-hour interval. The  
performance statistics for the first 24 hours are in both accumulative form  
and in 15-minute intervals. The statistics for the second 24 hours are only  
in accumulative form. It also allows you to clear the display and reset the  
counters. For the DL3800E unit, the E1 statistics displayed are BPV, EB, FE,  
ES, SES, BBE, UAS, EFS, ESR, SESR, and BBER.  
To view additional pages with this set of performance data, press the  
Cursor DOWN ARROW, or to view the previous page, press the Cursor UP  
ARROW.  
Additional NET STATISTICS are presented in subsequent screens. To view  
additional screens with this same set of performance data, press the tab key  
or the Cursor right and left arrow keys until the next field is highlighted,  
then press Enter. Continue to press Enterwith the NEXT field  
highlighted to view all the screens.  
This screen contains NET STATISTICS snapshots at 15-minute intervals.  
4-12  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
DIGITAL LINK DL3800E SR 3.00.22 NODE  
1:  
09/20/00 03:55:17 MJ  
SELECTED DEVICE ADDRESS:  
NET STATISTICS - PORT 1  
CURRENT SECONDS: 563  
1.00.000 NAME:  
Exit Repeat Clear  
PAST INTERVALS: 192  
Page 1  
ERROR-FREE SECONDS: 100.0%  
BBER: 0.0%  
ESR:  
0.0%  
SESR:  
0.0%  
BPV  
EB  
0
FE  
0
ES  
0
SES  
0
BBE  
0
UAS  
CURRENT  
0
0
0
0
0
0
CUMULATIVE 1  
CUMULATIVE 2  
0
0
0
0
0
0
0
0
0
0
03:30-03:45  
03:15-03:30  
03:00-03:15  
02:45-03:00  
02:30-02:45  
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 4-5 Additional NET STATISTICS  
.
Table 4-3 NET Statistics Items  
Parameter  
Definition  
EFS  
Error Free Seconds (EFS) is calculated whenever ESR is calculated, and is the simple  
percentage complement of ESR: EFS = 100.0 - ESR. When there have been UAS in  
the statistics history for the past 24 hours, then EFS is set at 100%.  
ESR  
Errored Second Ratio (ESR) is the ratio of ES to total seconds in available time during  
a fixed measurement interval. The fixed interval is the last 24 hours before the current  
15-minute interval. When there have been UAS in the statistics history for the past 24  
hours, then ESR is set at 0%.  
SESR  
BBER  
Severely Errored Second Ration (SESR) is the ratio of SES to total seconds in  
available time during a fixed-measurement interval. The fixed interval to be used is  
the last 24 hours before the current 15-minute interval. When there have been UAS  
in the statistics history for the past 24 hours, then SESR is set at 0%.  
Background Block Error Ratio (BBER) is the ratio of errored blocks to total blocks  
during a fixed-measurement interval, excluding all blocks during SES and unavailable  
time. The fixed interval is equal to the last 24 hours before the current 15-minute  
interval.  
Terminal Interface  
4-13  
 
4
Table 4-3 NET Statistics Items (Continued)  
Parameter  
Definition  
BPV  
This display provides the number of Bipolar Violations (BPVs) that have occurred  
during the accumulation period. A total of 15430 BPVs in a 10-second sliding  
window (approximately 10-3) will create a Major Alarm and 916 BPVs in a  
600-second sliding window (approximately 10-6) will create a Minor Alarm.  
FE  
A Frame Error (FE) is declared when two out of four consecutive framing bits are in  
error. Typically, an FE indication will be accompanied by a significant number of  
payload data bit errors. This display provides the number of FEs that have occurred  
in the accumulation period.  
EB/CV  
An Errored Block (EB) is a block in which one or more bits are in error. The EB if  
therefore equivalent to the Code Violation (CV) count calculated and displayed in the  
previous versions of the DL3800E unit. This count allows you to monitor the rate of EB  
faults on a line that is unavailable.  
EBs are counted in the unavailable state; ES, SES, and BBE are not counted in the  
unavailable state.  
ES  
An Errored Second (ES) is a one-second period with one or more errored blocks (such  
as one or more CRC4 errors) or an Out Of Frame (OOF). This display provides the  
number of ESs that have occurred in the accumulation period. ESs are not  
accumulated during UAS.  
SES  
Severely Errored Seconds (SES) is a one-second period which contains 30% or more  
errored blocks or at least one severely disturbed period (SDP). An SDP is present if  
either a LOS, AIAS, or LOF occurs.  
Since there are 1000 blocks per second, an SES is a one-second period which  
contains either a combination of 300 or more CRC4 errors, an OOF, or at least one  
of the following: LOS, AIS, or LOF. This requirement is a slight change from the prior  
DL3800E unit SES definition, which required 320 or more CRC4 errors or LOS, AIS,  
or LOF. SESs are not accumulated during UAS.  
BBE  
A Background Block Error (BBE) is an errored block not occurring as part of an SES.  
A BBE is calculated and displayed as a raw count of non-SES EBs. The count is  
updated at the end of every measurement second excepting any second that is an  
SES. The updated count is discarded for all UAS.  
4-14  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Table 4-3 NET Statistics Items (Continued)  
Parameter  
Definition  
UAS  
Unavailable Seconds. This display provides the number of UAS that have occurred in  
the accumulation period. At the onset of 10 consecutive SES events, a period of  
unavailable seconds begins. These 10 seconds are part of the unavailable seconds  
count. At the onset of 10 consecutive non-SES events, a new period of available time  
begins. These 10 seconds are part of available time.  
UAS occurs as soon as a Red Alarm is invoked (such as after two seconds of LOS.)  
ES, SES, and BBE are not counted during unavailable time. Rate parameters ESR,  
SESR, and BBER are the ratio of the fault-seconds count to the total seconds in  
available time.  
Event History  
Use this screen to review and clear the DL3800E unit alarm and status  
history.  
To view the EVENT HISTORY, move the highlight bar to EVENT HISTORY  
in the NODE MAIN MENU, and press Enter. Use the up and down keys  
to move to the next or previous page of the EVENT HISTORY MENU.  
Terminal Interface  
4-15  
 
4
Table 4-4 Alarm Level  
Alarm Parameter Definition  
Alarm Level:  
Major  
Minor  
Idled  
Service affecting  
Needs attention, not yet service affecting  
Alarm condition has expired  
Status  
Non-service-affecting event  
Date and Time  
Address  
Date and time of the occurrence or expiration of the alarm/state  
The address is the physical location  
Device  
The device reporting the status and alarm condition (Unit #), and the type of device  
(NET, DTE, or NODE)  
Event Code  
Description  
Number designation for type of alarm or status condition. This number will be  
useful when contacting the factory  
Describes the event  
To clear the report of all History Events, move the highlight bar to CLEAR  
HISTORY and press Enter. Figure 4-6 is an example.  
Major 01/01/90  
17:56:47  
Unit: 1NET : 2(33)  
Unit: 1NET : 2(13)  
Loss of Frame  
Idled 01/01/90  
17:56:58  
Loss of Frame Idled  
DIGITAL LINK DL3800E SR 2.00.000 NODE 7:HOME 01/01/90  
03:14:54 MN SELECTED DEVICE ADDRESS: 7.00.000NAME:HOME  
EVENT HISTORY  
Idled  
Exit  
Repeat Clear History  
Page 1  
01/01/9009:02:10Unit 1NET 2 (29)  
01/01/9009:02:06Unit 1NET 2 (30)  
Yellow Signal Detected Idled  
Major  
Status  
Idled  
Minor  
Yellow Alarm  
01/01/9008:58:09Unit 1NET 2 (29)  
Yellow Signal Detected  
01/01/9008:58:01Unit 2NET 3 (29)  
Yellow Signal Detected Idled  
01/01/9008:56:24Unit 1Node  
ROM Checksum Failed  
(36)  
Figure 4-6 EVENT HISTORY MENU  
4-16  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Configuration  
The CONFIGURATION MENU item provides access to a series of  
submenus to configure various parameters of the unit, DTE, and network.  
Highlight Configurationin the INVERSE MULTIPLEXER MAIN MENU  
and press Enterto access the CONFIGURATION MENU. See Figure 4-7.  
Major 01/01/90 04:58:17 Unit:  
Network 15 Minute UAS Major Threshold Exceeded  
Major 01/01/90 04:58:17 Unit: NET : 1 (114)  
Network 15 Minute UAS Major Threshold Exceeded  
DIGITAL LINK DL3800E SR 2.00.00 NODE 7: 01/01/90 05:55:07 MJ  
7.00.000 NAME:  
0
NET : 2 (114)  
0
SELECTED DEVICE ADDRESS:  
CONFIGURATION MENU  
Exit  
Unit  
DTE  
Network  
Network Thresholds  
SAVE configuration  
Figure 4-7 CONFIGURATION MENU  
To access any of the configuration submenus, highlight the desired item  
and press the Enter key. The following are samples and descriptions of  
the submenus that can be accessed from the CONFIGURATION MENU.  
Unit Configuration  
Highlighting UNITand pressing the Enterkey accesses the UNIT  
CONFIGURATION MENU shown in Figure 4-8. The configurable items  
and options are described in Table 4-5.  
The following parameters can be set or changed for the Node: DATE,  
TIME, ALARM ENABLE, AUTOMATIC BACKUP, FRONT PANEL,  
PERMIT SELECT DEVICE ACCESS FROM REMOTE, UNIT NUMBER,  
UNIT NAME and LOCAL TERMINAL BAUD RATE, BITS/PARITY, STOP  
BITS, X-ON/X-OFF and MULTIDROP MODE. HARDWARE, SOFTWARE  
and MIB REVISIONS are view-only items and cannot be changed.  
Terminal Interface  
4-17  
 
4
DIGITAL LINK DL3800E SR 3.00.22 NODE  
1:  
08/27/00 00:54:47 MAJOR  
SELECTED DEVICE ADDRESS: 1.00.000 NAME:  
UNIT CONFIGURATION  
DATE: 08/27/00  
Exit Confirm  
TIME: 00:54:38  
ALARM ENABLE: Disabled  
AUTOMATIC BACKUP: 5 minutes after a database change.  
FRONT PANEL: On  
PERMIT SELECT DEVICE ACCESS FROM REMOTE:  
No  
UNIT NUMBER:  
UNIT NAME:  
1
SOFT SERIAL #: 1389031127991  
HARDWARE REVISION: H SOFTWARE REVISION: 3.00.22  
MIB REVISION: 1.10 January 10 2000  
TERMINAL BAUD RATE: 9600  
TERMINAL #BITS AND PARITY: 8 bits, No parity  
TERMINAL STOP BITS: 2 bits  
(DOWNLOADED)  
Figure 4-8 UNIT CONFIGURATION MENU  
Table 4-5 Node Configuration Options  
Option  
Action  
Date  
Move the highlight bar to Date, and enter a valid date with the format  
MM/DD/YY, and press the Enter key.  
MM  
DD  
YY:  
1-12 month  
1-31 date  
0-99 year  
Time  
Move the highlight bar to Time, and enter a valid time with the format  
hh:mm:ss, and press the Enter key.  
HH 0-23 hours  
MM 0-59 minutes  
SS  
0-59 seconds  
Alarm Enable  
This option allows you to ENABLE or DISABLE the DL3800E unit External  
Alarms. Highlight ALARM ENABLE and, using the space bar, toggle  
between ENABLED and DISABLED until the desired choice appears.  
Automatic Backup  
This feature allows you to backup the database to the EEPROM  
automatically, at certain intervals, or manually. To change the present  
backup mode, highlight Automatic Backup, and use the Space Bar to toggle  
between the following choices: after every database change, 15 seconds,  
30 seconds, 1 minute, five minutes after each change, or Off (must change  
manually with Save Configuration).  
4-18  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Table 4-5 Node Configuration Options  
Action  
Option  
Front Panel  
This feature enables (On) or disables (Off) your ability to make changes in  
the configuration or run tests from the front panel display and buttons. To  
change the Front Panel feature, highlight Front Panel, and use the Space Bar  
to toggle between Off and On.  
Permit Select Device  
Access From Remote  
This feature enables (Yes) or disables (No) the capability that allows you to  
view and access the local configuration settings from the remote unit.  
Unit Number  
Move the Highlight bar to Unit Number, and enter a number between 1 and  
9999. Note: Each unit must be set to a different number to allow remote  
communication, and daisy chaining of multiple units. For example, if the  
remote unit is set to the same number as the local unit, you will not be able  
to access the remote unit.  
Unit Name  
Move the highlight bar to UNIT NAME and enter alphanumeric name of up  
to 20 digits. Press Enter when finished.  
Soft Serial Number  
This feature allows you to view the local serial number.  
If the remote unit is not software compatible with the soft serial number  
feature, the Unit Configuration screen still displays the serial number field  
but the information is incorrect. All the other information on the screen (for  
example, node number, hardware revision number) is still accurate.  
The soft serial number is preserved if you enter a Reset Entire Node  
Database to Factory Defaultscommand.  
Terminal Baud Rate  
This feature selects the terminal baud rate. To set or change the baud rate,  
move the highlight bar to Terminal Baud Rate, and press the Space Bar to  
toggle between the options: 300, 600, 1200, 2400, 4800, 9600, 19,200,  
and 38,400. (Default - 9600)  
Terminal Parity & Bits  
This feature selects the terminal parity and Bits. To set or change the local  
terminal parity and Bits, move the highlight bar to Terminal Parity & Bits,  
and press the Space Bar to toggle between the options 7,8, None, Odd,  
and Even. (Default - 8 None)  
Terminal Stop Bits  
Terminal XOn/XOff  
This feature selects the terminal stop bit requirement. To set or change the  
requirement, move the highlight bar to Terminal Stop Bits, and press the  
Space Bar to toggle between the options 1, 1.5, or 2. (Default - 2)  
This allows you to enable or disable the XOn/XOff Flow Control feature.  
With the Flow Control feature On, the terminal can request that the unit quit  
sending data when its buffers are full. To set or change this feature, move  
the highlight bar to Terminal XOn/XOff, and use the Space Bar to select  
choice. (Default - On)  
Terminal Interface  
4-19  
 
4
Table 4-5 Node Configuration Options  
Action  
Option  
Terminal Multidrop Mode  
If the terminal is connected to more than one DL3800E, it must be in  
Multidrop Mode. If it is connected to only one unit, this feature can be  
disabled. When it is disabled, the system starts up directly, without you  
having to log in. To change this configuration, move the highlight bar to  
Terminal Multidrop Mode, and use the Space Bar to toggle between the  
options Enabled, and Disabled. (Default - Enabled)  
To update the node database with all the changes made, move the  
highlight bar to CONFIRM and press Enter. Changes can be confirmed  
after each change, or, after all changes have been made. This completes the  
node configuration. To abort the changes, move the highlight bar to EXIT  
and press Enterbefore confirming the changes. (Note: If the terminal  
speed, parity or stop bits are changed, it is necessary to change the  
terminal before continuing.)  
DTE Configuration  
This menu allows you to configure certain parameters of the DTE,  
including the interface type, clock source, status of leads, and loss criteria.  
To access the DTE CONFIGURATION MENU, move the highlight bar to  
DTE CONFIGURATION in the CONFIGURATION MENU, and press  
Enter.  
Figure 4-9, 4-10, 4-11, and 4-12 are examples of the DTE Configuration  
Interface Menus (V.35, RS-449, X.21, and HSSI), and Table 4-6 describes the  
menu items.  
4-20  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
DIGITAL LINK DL3800E SR 3.00.22 NODE  
1:  
09/20/00 03:55:47 MJ  
SELECTED DEVICE ADDRESS: 1.00.000 NAME:  
DTE CONFIGURATION  
Exit Confirm  
DTE INTERFACE:  
DTE TOGGLE INTERVAL:  
V.35/RS-449/X.21 OPTIONS:  
V.35  
2 sec  
CLOCK:  
SCTE Tx Clock: INVERTED Rx Clock: NORMAL  
RLSD MODE:  
DSR MODE:  
CTS MODE:  
AUTOMATIC  
AUTOMATIC  
AUTOMATIC  
AUTOMATIC  
TM  
MODE:  
DTE LOSS DETECTION: NONE  
HSSI OPTIONS:  
CA  
MODE:  
DTE LOSS DETECTION:  
Figure 4-9 DTE CONFIGURATION MENU (V.35)  
DIGITAL LINK DL3800E SR 3.00.22 NODE  
1:  
08/27/00 00:52:37 MJ  
SELECTED DEVICE ADDRESS: 1.00.000 NAME:  
DTE CONFIGURATION  
Exit Confirm  
DTE INTERFACE:  
DTE TOGGLE INTERVAL:  
V.35/RS-449/X.21 OPTIONS:  
RS-449  
None  
CLOCK:  
SCTE Tx Clock: NORMAL  
AUTOMATIC  
AUTOMATIC  
Rx Clock: NORMAL  
RLSD MODE:  
DSR MODE:  
CTS MODE:  
AUTOMATIC  
TM  
MODE:  
AUTOMATIC  
DTE LOSS DETECTION: RTS  
HSSI OPTIONS:  
CA  
MODE:  
DTE LOSS DETECTION:  
Figure 4-10 DTE CONFIGURATION MENU (RS449)  
Terminal Interface  
4-21  
 
4
DIGITAL LINK DL3800E SR 3.00.22 NODE  
SELECTED DEVICE ADDRESS: 1.00.000 NAME:  
You must confirm to save changes.  
1:  
09/20/00 03:56:16 MJ  
DTE CONFIGURATION  
Exit Confirm  
DTE INTERFACE:  
X.21  
DTE TOGGLE INTERVAL:  
2 sec  
V.35/RS-449/X.21 OPTIONS:  
CLOCK:  
SCTE Tx Clock: INVERTED Rx Clock: NORMAL  
AUTOMATIC  
RLSD MODE:  
DSR MODE:  
CTS MODE:  
TM  
MODE:  
DTE LOSS DETECTION: NONE  
HSSI OPTIONS:  
CA  
MODE:  
DTE LOSS DETECTION:  
Figure 4-11 DTE CONFIGURATION MENU (X.21)  
DIGITAL LINK DL3800E SR 3.00.22 NODE  
1: 08/27/00 00:53:38 MAJOR  
SELECTED DEVICE ADDRESS: 1.00.000 NAME:  
DTE CONFIGURATION  
Exit Confirm  
DTE INTERFACE:  
DTE TOGGLE INTERVAL:  
V.35/RS-449/X.21 OPTIONS:  
CLOCK:  
HSSI  
2 sec  
Tx Clock:  
Rx Clock:  
RLSD MODE:  
DSR MODE:  
CTS MODE:  
TM  
MODE:  
DTE LOSS DETECTION:  
HSSI OPTIONS:  
CA  
MODE:  
AUTOMATIC  
DTE LOSS DETECTION: TA  
Figure 4-12 DTE CONFIGURATION MENU (HSSI)  
4-22  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Table 4-6 DTE CONFIGURATION MENU Options  
Parameter  
Description/Action  
DTE Interface  
This allows you to select V.35, RS449, X.21 or HSSI as the DTE Interface.  
To change the present DTE Interface, use the UP and DOWN ARROW  
keys to highlight DTE Interface. Use the Space Bar to toggle between  
V.35, RS-449, X.21, and HSSI until the desired choice appears. Highlight  
Confirm, and press the Enter key to confirm the change. (Default - V.35)  
DTE Toggle Interval  
This parameter determines the length of the interval during which the DTE  
lead indicating signal presence is deasserted when a change in the DTE  
data rate occurs.  
The DTE data rate changes if a network port goes or is taken out of  
service, or if a network loopback is set. The DTE lead toggled is RLSD in  
V.35, RS449, and X.21 modes, and CA in HSSI mode. This toggle  
interval is needed by some DTE devices to allow resynchronization to the  
new data rate. THe interval may be set to NONE, 0.5, 1.0, 1.5, or 2.0  
seconds. (Default - NONE)  
Clock  
This item allows you to enable either the SCT or SCTE leads, and to set the  
transmit (Tx), and receive (Rx) to Normal or Inverted mode.  
Note: In x.21 mode SCT corresponds to the S clock signal and SCTE to  
the x clock signal.  
To set the DTE Clock parameters, use the UP and DOWN ARROW keys to  
highlight the configurable Clock items, and use the Space Bar to toggle  
between the selections until the desired choice appears. The options are  
SCT or SCTE, Tx Normal or Inverted, and Rx Normal or Inverted. When  
the desired selection is in the display, highlight Confirm, and press the  
Enterkey to confirm the change (Default - SCTE, Tx Normal, Rx Normal)  
RLSD (Receive Line Signal  
Detector)  
This allows you to Assert, DeAssert, or set to Automatic the RLSD leads.  
To change or set the RLSD lead status, use the UP and DOWN ARROW  
keys to highlight RLSD, and use the Space Bar to toggle between Assert,  
DeAssert, or Automatic until the desired choice appears. Highlight  
Confirm, and press the Enter key to confirm the change. (In Automatic  
mode, the 3800E places the signal high when you have a clear signal  
from the network, indicating the E1 is up and running.)  
In X.21 mode, RLSD refers to the X.21 signal called Indication. (Default -  
Automatic)  
Terminal Interface  
4-23  
 
4
Table 4-6 DTE CONFIGURATION MENU Options (Continued)  
Parameter  
Description/Action  
DSR (Data Set Ready)  
This allows you to Assert, DeAssert, or set to automatic the DSR leads.  
To change or set the DSR lead status, use the UP and DOWN ARROW  
keys to highlight RLSD, and use the Space Bar to toggle between Assert,  
DeAssert, or Automatic until the desired choice appears. Highlight  
Confirm, and press the Enter key to confirm the change. (In Automatic  
mode, the 3800E places the signal high when the DTE is sending the  
associated signal lead DTR.) (Default - Automatic)  
CTS (Clear To Send)  
This allows you to Assert, DeAssert, or set to Automatic the CTS leads.  
To change or set the CTS lead status, use the UP and DOWN ARROW  
keys to highlight CTS, and use the Space Bar to toggle between Assert,  
DeAssert, or Automatic until the desired choice appears. Highlight  
Confirm, and press the Enter key to confirm the change. (In Automatic  
mode, the 3800E places the signal high when the DTE is sending the  
associated signal lead RTS.) (Default-Automatic)  
TM (Test Mode)  
This allows you to Assert, DeAssert, or set to Automatic the TM leads.  
To change or set the TM lead status, use the UP and DOWN ARROW keys  
to highlight TM, and use the Space Bar to toggle between Assert,  
DeAssert, or Automatic until the desired choice appears. Highlight  
Confirm, and press Enterto confirm the change. (In Automatic mode, the  
3800E places the signal high when the DCEs signal leads for enabling  
tests are placed high by the DTE.) (Default - Automatic)  
DTE Loss Detection  
Sets the criteria by which a DTE Loss Of Signal will be detected.  
In X.21 mode RTS refers to the X.21 signal called Control.  
To change or set the DTE LOS criteria, use the UP and DOWN ARROW  
keys to highlight DTE LOSS DETECTION, and use the Space Bar to toggle  
between the choices: RTS, DTR, and None. When the desired choice is  
shown, highlight Confirm, and press Enter to confirm the change.(In  
x.21 mode, RTS refers to the x.21 signal called Control). (Default - RTS)  
The following entries must be added:  
4-24  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Table 4-6 DTE CONFIGURATION MENU Options (Continued)  
Description/Action  
Parameter  
CA MODE  
Allows user to set the CA lead to ASSERT, DEASSERT, or AUTOMATIC  
when the interface is set to HSSI.  
This setting is only accessible when the interface type is set to HSSI. To  
change or set the CA lead status, use the UP and DOWN ARROW keys to  
highlight CA and use space bar to toggle between ASSERT, DESSART, or  
AUTOMATIC until the desired choice appears. Highlight CONFIRM and  
press Enter to confirm the change. (In AUTOMATIC mode, the 3800  
places the signal high when there is one or more active network signals.)  
(Default - AUTOMATIC)  
DTE LOSS DETECTION  
Allows users to set the criteria by which a DTE Loss of Signal will be  
detected when the interface is set to HSSI.  
This setting is only accessible when the interface type is set to HSSI. To  
change or set the DTE LOS criteria, use the UP and DOWN ARROW keys  
to highlight DTE LOSS DETECTION and use the space bar to toggle  
between TA and NONE until the desired choice appears. Highlight  
CONFIRM and press Enter to confirm the change. (Default - TA)  
Network Configuration  
This submenu allows you to configure various Network parameters. The  
configurable parameters include CRC4, TSLOT16, and National Bits.  
To access the NETWORK CONFIGURATION MENU, move the highlight  
bar to NETWORK CONFIGURATION in the CONFIGURATION MENU  
and press Return.  
The NETWORK CONFIGURATION MENU will be slightly different  
depending on which version DL3800E unit is being used. Figure 4-13  
shows the NETWORK CONFIGURATION MENU. Table 4-7 describes the  
various parameters included.  
Terminal Interface  
4-25  
 
4
Major 01/01/90 04:58:17 Unit:  
0
NET : 2 (114)  
Network 15 Minute UAS Major Threshold Exceeded  
Major 01/01/90 04:58:17 Unit: NET : 1 (114)  
Network 15 Minute UAS Major Threshold Exceeded  
DIGITAL LINK DL3800E SR 2.00.00 NODE 7:  
7.00.000 NAME:  
0
01/01/90 05:55:07 MJ  
SELECTED DEVICE ADDRESS:  
NETWORK CONFIGURATION  
Exit Confirm  
PORT  
ALARM  
REPORT  
REPORT  
MASK  
MASK  
MASK  
MASK  
REPORT  
MASK  
ACTIVE/RESTORE CRC4  
Use w/auto restoreENABLE DATA  
Use w/auto restoreENABLE DATA  
TSLOT16  
N1  
1
1
1
1
1
1
1
1
N2  
1
1
1
1
1
1
1
1
N3  
1
1
1
1
1
1
1
1
N4  
1
1
1
1
1
1
1
1
N5  
1
1
1
1
1
1
1
1
1
2
3
4
5
6
7
8
Never Use  
Never Use  
Never Use  
ENABLE  
ENABLE  
ENABLE  
DATA  
DATA  
DATA  
Never UseENABLE DATA  
Use w/auto restoreENABLE DATA  
Never Use  
ENABLE  
DATA  
Primary Clock Source:  
Secondary Clock Source: Xmt: Net  
Xmt: Int  
Rcv: Net 1  
Rcv: Net 2  
DSU MODE: Inverse Mux (Standard operation)  
Suppress Yellow Det.: Disabled  
Second Error restoral interval: Immediate  
Hardware Revision:  
Port 3&4: --  
Port 5&6: -- Port 7&8: --  
Figure 4-13 Network Configuration Screen  
Table 4-7 NETWORK CONFIGURATION MENU Options  
Description/Action  
Parameter  
Alarm  
This item allows you to enable (Report) or disable (Mask) the DL3800E unit  
from reporting alarms or sending SNMP traps from any of the individual E1  
network ports.  
To change the present Alarm mode, use the UP and DOWN ARROW keys  
to highlight the Alarm item in the appropriate line for the desired port, and  
use the Space Bar to toggle between Report and Mask. Highlight Confirm,  
and press the Enter key to confirm any change. (Default - Mask)  
Active/Restore Mode  
Selects the Active/Restore Mode for each of the E1 network ports.  
To change the present mode, use the UP and DOWN ARROW keys to  
highlight the Active/Restore Mode option for the desired port, and use the  
Space Bar to toggle between the following selections until the desired choice  
appears: use w/auto restore (failed line is restored automatically when  
problem is solved); use w/manual restore (user must manually restore line);  
Never Use (never mux data onto this line); Install/Test only (always mux  
data onto this line, even when its bad). (Default - Never Use)  
CRC4  
Allows CRC4 coding to be enabled or disabled  
4-26  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Table 4-7 NETWORK CONFIGURATION MENU Options (Continued)  
Description/Action  
Parameter  
TSLOT16  
Allows you to select between DATA and FLAG. If DATA is selected, timeslot  
16 will be used for payload data. If FLAG is selected, timeslot 16 will not be  
used for payload and will be stuffed with the value 7E hex.  
NOTE: E1 links are not truly independent. This field is selectable on a per-  
E1 link basis. When the DL3800E unit treats the set of E1 links as a whole.  
If only one E1 link is selected for FLAG, then the DTE bandwidth is reduced  
to an amount corresponding to all links having been set for a time slot loss.  
Primary Clock Source  
This allows you to select either the Primary Clock Source, transmit (xmt), and  
receive (rcv) for the individual E1 network ports.  
To change the present Primary Clock Source, use the UP and DOWN  
ARROW keys to highlight either Xmt or Rcv on the Primary Clock Source  
line, and use the Space Bar to toggle between the choices. For Xmt  
(transmit) the choices are Network (NET), External (EXT), and Internal (INT).  
For Rcv (receive) the choices are Net-1 through Net 8 (each of the individual  
E1 network ports), or Auto (the unit selects the best source).  
The DL3800E unit can use several sources to generate the transmit clock.  
The Internal selection uses an oscillator within the DL3800E, the Network  
setting recovers the clock from the selected E1 line, and the External setting  
recovers the clock from the dB-9 Ext. Clock connector on the rear panel of  
the unit. Typically, the clock source on one side of the link is set to Internal,  
and the other is set to Network. (Default - Smt: Int., Rcv: Net 1)  
Secondary Clock Source  
This allows you to select either the Secondary Clock Source, transmit (xmt),  
and receive (rcv) for the individual E1 network ports.  
To change the present Secondary Clock Source, use the UP and DOWN  
ARROW keys to highlight either Xmt or Rcv on the Secondary Clock Source  
line, and use the Space Bar to toggle between the choices. For Xmt  
(transmit), the choices are Network (NET), External (EXT), and Internal (INT).  
For Rcv, the choices are Net-1 through Net 8 (each of the individual E1  
network ports) or Auto (the unit selects the best source) until the desired  
choice appears. (Default - Xmt: Int, Rcv: Net2)  
DSU Mode  
This allows youyou to set the DL3800E unit up as a DSU, with one DTE, and  
one Network port.  
To change the present DSU Mode level, use the UP and DOWN ARROW  
keys to highlight the DSU Mode item, and use the Space Bar to toggle  
between the following selections until the desired choice appears: Inverse  
MUX (standard operation) or Single E1 DSU. Highlight Confirm, and press  
the Enter key to confirm the change. (Default-Inverse Mux)  
Terminal Interface  
4-27  
 
4
Table 4-7 NETWORK CONFIGURATION MENU Options (Continued)  
Description/Action  
Parameter  
Suppress Yellow Detect  
This item allows you to configure the unit to ignore or report RAI alarm  
conditions.  
To change the present Suppress Yellow Detect, use the UP and DOWN  
ARROW keys to highlight the item, and use the Space Bar to toggle  
between Enabled and Disabled until the desired choice appears. Highlight  
Confirm, and press the Enter key to confirm the change. (Default -  
Disabled)  
Second Error Restoral  
Interval  
The second error restoral configuration is found on the Network  
Configuration Screen on the DL3800E/3900s. Choices for configuration are  
immediate, 5, 10, 15, 30 seconds and 1, 5, 10, 15 minutes. As seen from  
previous discussions on fallback conditions, you should notice that it is  
possible that an E1 will constantly go in and out of service on a flaky circuit.  
Every time an E1 is taken out of service or put in-service this will  
momentarily affect your traffic on the other E1s. In order to prevent this  
problem second error restoral was created.  
Second error restoral is a feature that will allow the Imux units to monitor a  
bad E1 for a period of time after it has gone out of service and come back  
on-line. Once an E1 has come back after the first out of service state has  
occurred the Imux unit will monitor the E1 for the second error restoral  
interval selected. If a second out of service state occurs during the  
monitoring period the Imux unit will keep the E1 out of service (when the E1  
is good again) for the SER time. Every time a new error occurs with in the  
second error restoral period, when it is keeping the E1 out of service, will  
restart the SER counter. Once the SER timer expires the E1 will be restored  
and the process will start again. You can look SER like two strikes and your  
out for E1s on Imux units.  
Network Thresholds  
This menu allows you to enable/disable the automatic FALLBACK feature  
and set the various Network Alarm Thresholds that will cause the E1 lines  
to automatically be taken out of service.  
Figure 4-14 is an example of the NETWORK ALARM THRESHOLDS  
configuration screen.  
4-28  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Major 01/01/90 04:58:17 Unit:  
Network 15 Minute UAS Major Threshold Exceeded  
Major 01/01/90 04:58:17 Unit: NET : 1 (114)  
Network 15 Minute UAS Major Threshold Exceeded  
0
NET : 2 (114)  
0
DIGITAL LINK DL3800E  
SR 2.00.00 NODE 7: 01/01/90 05:55:07 MJ  
SELECTED DEVICE ADDRESS: 7.00.000 NAME:  
NETWORK ALARM THRESHOLDS  
CONSECUTIVE THRESHOLDS  
Exit Confirm  
FALLBACK SECONDS  
CRC SecondsDisabled10  
SES Disabled10  
Disabled10  
UAS  
INTERVAL THRESHOLDS  
15 MINUTES  
FALLBACK  
Disabled  
Disabled  
Disabled  
Disabled  
Disabled  
24 HOURS  
MAJOR MINOR FALLBACK  
MAJOR MINOR  
BPV Err Sec(10E-3)  
CRC Seconds  
ES  
SES  
UAS  
100  
100  
100  
100  
100  
100  
100  
100  
100  
100  
Disabled10  
10  
10  
10  
10  
10  
Disabled10  
Disabled10  
Disabled10  
Disabled10  
Figure 4-14 Network Thresholds Configuration  
Through the CONSECUTIVE THRESHOLDS section of this menu, you  
disable or enable the fallback condition relating to the number of  
consecutive seconds (from 1 to 100) in which a CRC, SES or UAS alarm  
threshold is exceeded. To Enable or Disable the FALLBACK feature,  
highlight the appropriate item, and use the space bar to select your choice.  
To change the number of errored consecutive seconds that will cause that  
E1 line to go out of service, highlight the appropriate item and press  
Enter. When the highlight bar is blank, type in the number of seconds  
desired.  
NOTE: Default settings are shown in Figure 4-14  
The INTERVAL THRESHOLDS section of this menu allows you to enable  
or disable the FALLBACK feature. FALLBACK relates to the number of in-  
error seconds (from 1 to 900) occurring in a 15-minute period, or the  
number of in-error 15-minute intervals (from 1 to 96) occurring in a 24-  
hour period that will cause a MAJOR or MINOR alarm. To Enable or  
Disable the FALLBACK feature, highlight the appropriate item and use the  
space bar to select your choice. To change the number of in error seconds  
or 15-minute intervals that will cause a MAJOR or MINOR network alarm,  
highlight the appropriate item and press Enter. When the highlight bar is  
blank, type in the number desired.  
Terminal Interface  
4-29  
 
4
Save Configuration  
This option allows you to manually back up the database to EEPROM at  
any time. To Save Configuration and back up the database to EEPROM,  
highlight the Save Configurationin the CONFIGURATION MENU, and  
press the Enter key.  
System Utilities  
The SYSTEM UTILITIES MENU in the INVERSE MULTIPLEXER MAIN  
MENU is used to access submenus in the DL3800E unit to configure  
various system utilities and perform certain functions with the DL3800E.  
These System Utilities include Software Download, Delete Entire Node  
Configuration, Login Configuration, SNMP Configuration, and Save  
Configuration.  
To access the SYSTEM UTILITIES MENU, highlight System Utilitiesin  
the INVERSE MULTIPLEXER MAIN MENU, and press the Enterkey.  
Figure 4-15 is an example of the SYSTEM UTILITIES MENU that will  
appear. To access any of the submenus or perform certain functions,  
highlight that line item, and press the Enterkey.  
Major 01/01/90 04:58:17 Unit:  
Network 15 Minute UAS Major Threshold Exceeded  
Major 01/01/90 04:58:17 Unit: NET : 1 (114)  
Network 15 Minute UAS Major Threshold Exceeded  
0
NET : 2 (114)  
0
DIGITAL LINK DL3800E  
SR 2.00.00 NODE 7: 01/01/90 05:55:07 MJ  
SELECTED DEVICE ADDRESS:  
7.00.000 NAME:  
Exit  
SYSTEM UTILITIES MENU  
SYSTEM UTILITIES MENUExit  
Software Download  
DELETE Entire Unit Configuration  
Login Configuration  
SNMP Configuration  
SAVE Configuration  
Figure 4-15 SYSTEM UTILITIES MENU  
4-30  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Software Download  
This selection is used to choose the desired mode for upgrading the  
DL3800E unit software revision level via download if this option is  
available. Highlight SOFTWARE DOWNLOAD in the SYSTEM UTILITIES  
MENU and press Enter. The SOFTWARE DOWNLOAD MENU (Figure  
4-16) appears on the screen.  
DIGITAL LINK DL3800E SR 3.00.22 NODE  
1: 08/27/00 00:55:24 MAJOR  
SELECTED DEVICE ADDRESS:  
DOWNLOAD NEW SOFTWARE  
DOWNLOAD PROTOCOL: None  
1.00.000 NAME:  
Exit  
Confirm  
DOWNLOAD DESTINATION: Remote Unit  
-- DOWNLOAD OPTIONS, LOCAL END --  
IMMEDIATE SOFTWARE ACTIVATION: Enabled  
RAM SOFTWARE OPTIONS: None  
Figure 4-16 SOFTWARE DOWNLOAD MENU  
NOTE: DL3800E units with different software versions may not support  
all features available in the more recent version. It is recommended that  
local and remote units have identical software versions installed. If  
possible, both local and remote units should always be upgraded when  
installing newer software versions.  
The following equipment is required to download new software.  
A PC with a disk drive capable of reading an MS DOS binary file is  
required. Quick Eagle Networks provides a 3.5 inch floppy formatted  
for 1.4 Mb for downloading software.  
A terminal emulation program such as Procomm, Mirror, or Xtalk with  
VT100 or ANSI emulation that supports one or all of the following:  
Motorola S-Records with ASCII Transfer  
Binary Image with Xmodem  
Binary Image with Kermit  
Make the proper RS-232 connection between the PC and the DL3800E. A  
DE-9 connector is pinned out on the DL3800E unit such that the use of a  
null modem is not necessary. DE-9 to DB-25 adapters may be needed  
depending upon the PC used.  
Terminal Interface  
4-31  
 
4
NOTE: The following steps are recommended before initiating the  
download process.  
Disable all control lead dependencies (RTS, CTS, DCD, etc.)  
Disable XON/XOFF flow control.  
Disable DCD (Data Carrier Detect) aborts (especially on Procomm).  
1. Copy the files off the floppy onto the hard drive on the PC. The  
names of the files will vary in accordance with the current  
software revision. The file name should look similar to the  
following: V10xxxxx.RAM.  
2. Start the emulation program on the PC and set it up match the  
DL3800E unit comm port configuration. Default configuration for  
the DL3800E unit is 9600 Baud, 8 bits, No parity, 2 stop bits.  
Connect the PC serial port to the DL3800E unit COMM PORT.  
3. If the DL3800E unit is set up for Direct Terminalconfiguration,  
typing a Ctrl-Lwill refresh the screen. If it is set up for  
multidrop mode, see Log In/Log Offon page 4-1 on how to Log  
in to a unit.  
4. Select the Software Downloadoption from the SYSTEM  
UTILITIES MENU. On the SYSTEM UTILITIES MENU, scroll  
down to where it says Noneand press the space bar until the  
desired mode appears. Select CONFIRMand press Enteragain to  
save the change. The DL3800E unit is now ready to receive a file.  
5. Enter the file transfer mode on the terminal emulation program  
and transfer the appropriate file. The file transfer will take at least  
10 minutes at 9600 baud.  
6. Once the file has downloaded, the DL3800E unit will take up to 30  
seconds to reboot if the IMMEDIATE SOFTWARE ACTIVATION  
feature is enabled. If any communications errors were  
encountered, it may be necessary to perform this operation again.  
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4
Software Download Options  
Immediate Software Activation (Enable/Disable)  
The IMMEDIATE SOFTWARE ACTIVATION mode is controlled from the  
SYSTEMS UTILITIES/SOFTWARE DOWNLOAD MENU. When the  
IMMEDIATE SOFTWARE ACTIVATION feature is enabled, the software  
download (using MSR, Xmodem, Kermit, TFTP) is immediately activated  
(that is, copied from RAM to FLASH and rebooted).  
For consistency with the previous software version, IMMEDIATE=enabled  
is the default setting. If the IMMEDIATE SOFTWARE ACTIVATION  
feature is disabled, the software download (using MSR, Xmodem, Kermit,  
TFTP) is not activated (that is, not copied from RAM to FLASH and not  
rebooted).  
You must activate the software at a later time by issuing a software  
download activation command from the System Utilities/Download  
Software/ RAM SOFTWARE OPTIONS selection field. When the software  
activation command is executed, the system copies the software image  
from RAM to Flash and reboots.  
A system restart (power cycle) that occurs after the download, but before  
the activation, will not activate the new software. Loss of power causes the  
non-activated software download to be lost.  
Download Destination (Local Unit, Remove Unit, Both Units)  
This feature provides software to be loaded to either the local unit, the  
remote unit, or both. Use of the Remote or Both option requires use of the  
Xmodem or Kermit protocol.  
A file image loaded to the remote unit is sent over the proprietary  
IMUX Embedded Data Link (EDL). The EDL is available regardless of  
the E1 line coding and framing.  
To download to the Remote Unit, you do not log into the Remote;  
instead you select the download destination using the Download  
Destination field which allows a download to both units at once. It also  
minimizes disruption to the terminal interface session when the  
Remote Unit does an immediate software activation (which involves  
that units rebooting).  
Terminal Interface  
4-33  
 
4
RAM Software Options  
RAM Software Options - Query RAM Software  
This feature determines when a valid software image exists in RAM by  
checking the CRC and image ID. The query indicates if the software can be  
activated in the unit.  
The following response messages are possible:  
RAM Image is valid. - CRC is valid, Image ID is valid  
RAM Image is active - no reboot necessary. - CRC is valid,  
Image ID is valid, but images are identical.  
RAM Image is invalid (Product ID Error) xxxxxx- CRC is valid,  
Image ID is xxxxxx.  
RAM Image is invalid (Size too small)- Header indicated the  
code buffer is too small.  
RAM Image is invalid (Size too big)- Header indicated the code  
buffer is beyond its range.  
RAM Image is invalid (CRC error)- CRC is invalid.  
The DL3800E unit image ID is reserved for use in a future application.  
This command does not activate the software if it is downloaded and is  
pending activation, nor does it indicate the software revision of the  
downloaded image.  
Querying the Remote Unit is performed by first logging into the remote  
unit from the Main Menu, then navigating to this menu.  
RAM Software Options - Activate RAM Software  
This feature activates downloaded software by copying the code from  
RAM to FLASH and then rebooting the unit. If a valid (that is, Image ID  
and CRC are valid) software image does not exist in RAM, the command  
fails and a reboot will not occur.  
An extended loss of power causes the non-activated software download to  
be lost.  
Modifying this setting in the Remote Unit is performed by first logging  
into the remote unit from the Main Menu, then navigating to this menu.  
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4
TFTP Software Download  
If immediate software activation is enabled on the target unit, the software  
is downloaded to the target unit, and is activated by copying the code from  
RAM to FLASH and then rebooting.  
A TFTP Software Download server is built into the DL3800E. This feature  
allows you to do an TFTP transfer (using the SLIP/NMS port) to the unit  
RAM. You issue the Putcommand to the unit to initiate the transfer. If  
you specify the remote unit IP address, the local unit forwards the TFTP  
packets to the remote unit.  
Once the transfer is complete, activation is based on the setting of the  
Immediate Software Activation feature with the following results:  
If Immediate Software Activation is disabled on the target unit, the  
software is downloaded to the RAM of the target unit, but is not  
activated and a reboot does not occur.  
If Immediate Software Activation is enabled on the target unit, the  
software is downloaded to the RAM of the target unit, and is activated  
by copying the code from RAM to FLASH memory and then rebooting.  
The performance of the TFTP data transfer is limited by the speed of the  
NMS/SLIP port, which has a maximum 38400 baud rate and the  
Embedded Data Link if the transfer is going to the remote unit. Only the  
PutTFTP server is functional; you cannot do a Getof the software  
from the unit.  
Ensure that you specify binary mode instead of ascii mode in the TFTP  
client.  
Delete Entire Unit Configuration (revert to factory config)  
WARNING: This command will interrupt service.  
Deleting the unit database causes the unit, and any other device's database  
within that unit, to be reset to the factory default setting. All device names  
will be erased, and all connections will be removed. The time and date,  
however, will remain the same, and the node number will be set to  
0.00.00.  
As the warning states above, if there are any valid connections in the node,  
execution of this command will interrupt service.  
Terminal Interface  
4-35  
 
4
To delete the entire unit configuration, select DELETE ENTIRE UNIT  
CONFIGURATION from the SOFTWARE UTILITIES MENU, and press  
Enter. Use the arrow keys to highlight the Desired Action field. Press the  
space bar until RESET ENTIRE NODE DATABASE TO FACTORY  
DEFAULTS appears in the field. The change must then be confirmed. Move  
the highlight bar to CONFIRM, and press the Enterkey. Deleting the  
entire node configuration puts all parameters back to their Factory Default  
Settings.  
From the SOFTWARE UTILITIES MENU (Figure 4-17 on page 4-36) you  
may also perform the following functions:  
Delete RAM code and Revert to ROM code  
Restart Node Software  
Major 01/01/90 04:58:17 Unit:  
Network 15 Minute UAS Major Threshold Exceeded  
Major 01/01/90 04:58:17 Unit: NET : 1 (114)  
0
NET : 2 (114)  
0
Network 15 Minute UAS Major Threshold Exceeded  
DIGITAL LINK DL3800E SR 2.00.00 NODE 7: 01/01/90 05:55:07 MJ  
SELECTED DEVICE ADDRESS:  
7.00.000 NAME:  
Exit  
DELETE ENTIRE UNIT CONFIGURATION  
DESIRED ACTION: None  
DO YOU REALLY WANT TO DO THIS? PLEASE CONFIRM:  
Confirm  
Figure 4-17 SOFTWARE UTILITIES MENU  
Delete RAM Code and Revert to ROM Code  
To delete RAM code and revert to ROM code, select DELETE ENTIRE  
UNIT CONFIGURATION from the SOFTWARE UTILITIES MENU, and  
press Enter. Use the arrow keys to highlight the Desired Action field.  
Press the space bar until DELETE RAM CODE AND REVERT TO ROM  
CODE appears in the field. The change must then be confirmed. Move the  
highlight bar to CONFIRM, and press Enter.  
Restart Node Software  
Restart Node Software resets the unit without powering down.  
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4
To Restart Node Software, select DELETE ENTIRE UNIT  
CONFIGURATION from the SOFTWARE UTILITIES MENU (Figure 4-17)  
and press Enter. Use the arrow keys to highlight the Desired Action field.  
Press the space bar until RESTART NODE SOFTWAREappears in the field.  
Confirm the change. Move the highlight bar to CONFIRM, and press Enter.  
Login Configuration  
This screen allows you to designate a NAME, PASSWORD and ACCESS  
PRIVILEGE LEVEL for up to eight users.  
When the unit is shipped, the factory defaults for username and password  
are null. Pressing Enterbypasses both of these parameters until the first  
name and password are entered.  
To access the LOGIN CONFIGURATION MENU, move the highlight bar to  
LOGIN CONFIGURATION in the NODE MAIN MENU and press Enter.  
Figure 4-18 is an example of the LOGIN CONFIGURATION MENU.  
DIGITAL LINK DL3800E SR 3.00.22 NODE  
1:  
08/27/00 00:55:51 MJ  
SELECTED DEVICE ADDRESS: 1.00.000 NAME:  
LOGIN CONFIGURATION  
Exit Confirm  
PASSWORD  
USER IDENTIFICATION  
ACCESS TYPE(S)  
Full access  
Maintenance  
Provisional  
Full access  
No access  
No access  
No access  
No access  
1) Cole Porter  
2) Arthur Fiedler  
3) Louie Armstrong  
4) Billie Holiday  
5)  
6)  
7)  
8)  
12CP  
Arty1  
Satchmo  
LadyDay  
TERMINAL AUTOMATIC LOGOUT: Off. (Must use Logout to return to login prompt).  
TELNET AUTOMATIC LOGOUT: 5 minutes after no keyboard activity.  
Figure 4-18 LOGIN CONFIGURATION MENU  
NOTE: Name and Password are case-sensitive  
Terminal Interface  
4-37  
 
4
Users must have Full Access class to view or change this screen.  
The name and password can be any alphanumeric designation up to 16  
characters in length. To enter a name or password, move the highlight bar  
to the appropriate line and column, and type in the alphanumeric  
designation. Move the highlight bar to CONFIRM, and press Enterto  
confirm the changes.  
To designate the access privileges that a particular user is to be allowed,  
move the highlight bar to that column of the menu on your line and, using  
the space bar, toggle between the following options; FULL ACCESS,  
MAINTENANCE, PROVISION, PROVISION+MAINTENANCE, NO  
ACCESS, and DISPLAY ONLY.  
NOTE: At least one user must have full access to the unit.  
Table 4-8 Login Configuration Options  
Parameter  
Description  
Full Access Class  
View any menu and perform any function. It is the only access class  
where you are allowed to view the LOGIN CONFIGURATION MENU  
and assign names, passwords, and access levels to users. This user is  
also the only one who can change the SNMP Configuration, Download  
Software, or Delete Entire Node Configuration  
Maintenance  
Provision  
Clears the event history log, clear statistics, and initiate tests.  
Allows you to configure the DL3800E.  
Provision + Maintenance Allows you to perform all functions allowed Provision and Maintenance  
access described above.  
Display Only  
Allows you access to view-only screens. You are not allowed to make any  
changes or initiate tests.  
No Access  
Not allowed to access the menu screens.  
Terminal Automatic  
Logout  
Sets the Automatic Logout feature of the DL3800E. The unit will logout if  
no activity is detected for the amount of time configured.  
To change configuration, highlight the item and, using the Space Bar,  
toggle until your selection appears. Move the highlight to Confirm, and  
press Enter to confirm the change. The default is Off, with15 sec.,30  
sec.,1min., three min., five min., 10 min. and 30 min. also configurable.  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
NOTE: If the you try to access a screen or perform a function beyond  
your allowed access level, the following message appears: Access  
denied - your account does not have this PRIVILEGE.  
SNMP Configuration  
Through the SNMP CONFIGURATION MENU, you configure the  
Network Manager (NMS) port on the rear panel of the DL3800E, setting  
various addresses and configurable items required for operation with an  
SNMP Network Manager. The DL3800E unit utilizes SLIP protocol over the  
RS232 port to communicate with the SNMP management station.  
To access the SNMP CONFIGURATION MENU, move the highlight bar to  
SNMP CONFIGURATION in the CONFIGURATION MENU, and press  
Enter.  
Figure 4-19 is an example of the SNMP CONFIGURATION MENU, and  
Table 4-9 describes the SNMP parameters:  
DIGITAL LINK DL3800E SR 3.01.0B NODE  
1:123  
08/27/00 00:55:51 MJ  
SELECTED DEVICE ADDRESS: 1.00.000 NAME:123  
SNMP CONFIGURATION  
Exit Confirm  
NMS SERIAL PORT (SLIP)  
UNIT IP ADDRESS: 172.019.001.038 UNIT IP SUBNET MASK:255.255.255.000  
TRAP IP ADDRESS:  
0.000.000.000 Port: Slip  
0.000.000.000 Port: Slip  
0.000.000.000 Port: Slip  
REMOTE IP ADDRESS: 0.000.000.000  
SLIP TRAP DELAY: 0seconds  
REMOTE TRAP DELAY: 0 seconds  
READ COMMUNITY STRING: public  
WRITE COMMUNITY STRING: public  
TRAP COMMUNITY STRING  
public  
SNMP BAUD RATE: 9600  
SNMP #BITS AND PARITY: 8 bits, No parity  
SNMP STOP BITS: 2 bits  
Figure 4-19 SNMP CONFIGURATION MENU  
Terminal Interface  
4-39  
 
4
Table 4-9 SNMP Configuration Options  
Description/Action  
Option  
Unit IP Address  
The Unit IP Address is a 32-bit quantity which uniquely identifies the node in  
the IP network. This address is used by the SNMP manager to access  
information from the node.  
To set or change the Unit IP Address, move the highlight bar to Unit IP  
Address, and enter a 32-bit quantity. Press Enter when finished.  
Unit IP Subnet Mask  
Trap IP Address  
The Unit IP Subnet Mask is a 32-bit quantity that identifies which bits in the IP  
address identify the physical network.  
To set or change the Unit Subnet Mask, move the highlight bar to Unit  
Subnet Mask, and enter a 32-bit quantity. Press Enter when finished.  
The Trap IP Address is a 32-bit quantity that identifies the SNMP manager, the  
address to which the node sends any event messages.  
You can specify up to three different IP addresses.  
To set or change the Trap IP Address, move the highlight bar to Trap IP  
Address, and enter a 32-bit quantity. Press Enter when finished.  
Read Community String This alphanumeric identifier, up to 31 characters in length, identifies a portion  
of the SNMP network that is able to read messages from the node.  
To set or change the Read Community String, move the highlight bar to Read  
Community String and enter an alphanumeric identifier, up to 31  
characters in length. Press Enter when finished.  
Write Community String This alphanumerical identifier, up to 31 characters in length, identifies a  
portion of the SNMP network that can write messages to the node.  
To set or change the Write Community String, move the highlight bar to Write  
Community String, and enter an alphanumeric identifier, up to 31  
characters in length. Press Enter when finished.  
Trap Community String  
This alphanumeric identifier, up to 31 characters in length, identifies a portion  
of the SNMP network that is able to receive event messages from the node.  
To set or change the Trap Community String, move the highlight bar to Trap  
Community String, and enter an alphanumerical identifier. Press Enter  
when finished.  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Table 4-9 SNMP Configuration Options (Continued)  
Description/Action  
This feature selects the SNMP ports baud rate.  
Option  
SNMP Baud Rate  
To set or change the SNMP port baud rate, move the highlight bar to SNMP  
Baud Rate, and press the Space Bar to toggle between the options until  
the desired speed appears. The options are: 300; 600; 1200; 2400; 4800;  
9600; 19,200 and 38,400. (Default - 9600)  
If the SNMP Baud rate is changed, it is necessary to change the baud rate at  
the connection to the SNMP manager before continuing. The same is true for  
modifying the parity and/or number of stop bits.  
SNMP Bits & Parity  
SNMP Stop Bits  
This feature selects the SNMP ports parity.  
To set or change the SNMP Parity, move the highlight bar to SNMP Bits &  
Parity, and press the Space Bar to toggle between the options until the  
desired parity appears. The options are: None, Odd, and Even. Bits is always  
set at 8. (Default - None)  
This feature selects the SNMP manager stop bit requirement.  
Move the highlight bar to SNMP Stop Bits, and press the Space Bar to  
toggle between the options 1,1.5, or 2. (Default-2)  
To update the SNMP database with all the changes made, move the  
highlight bar to CONFIRM, and press the Enterkey. Changes can be  
confirmed after each change or after all changes have been made.  
IP Bridging to a Remote Unit  
The IMUX unit now supports bridging of selected IP packets to the remote  
IMUX unit. The bridged packets are transported between the remote unit  
and the local NMS/SLIP port using the proprietary Embedded Data Link.  
In order to minimize bandwidth constraints, only the following protocols  
are bridged:  
SNMP  
Ping (ICMP Echo Request/Echo Response, a subset of full ICMP)  
TFTP  
SNMP Traps from remote  
The illustration below shows the SNMP Configuration from the SYSTEM  
UTILITIES MENU.  
The IMUX unit has a configurable Remote IP Addressparameter used to  
identify the remote unit. The remote IMUXs Unit IP Addressparameter  
should be set to the same value, although this is not strictly necessary.  
Terminal Interface  
4-41  
 
4
However, it is important to note that the remote IMUXs Unit IP Address”  
parameter must be set to some non-zero value in order to respond to the  
bridged IP packets.  
SNMP trap packets from the remote IMUX unit are modified upon receipt.  
The source IP address field in the trap packet is modified to the Remote IP  
Addressparameter; then the packet is forwarded out the NMS/SLIP link.  
In-Band SNMP to Remote  
This feature allows you to manage both local and remote units with a  
single NMS station attached to only one of the two units.  
If the unit receives an SNMP packet from its SLIP port with the IP address  
of the remote unit, the local unit forwards the packet to the remote unit  
over the Embedded Data Link.  
If the unit receives an SNMP packet that does not match its IP address or  
the IP address of the remote unit, the packet is discarded.  
The unit responds to SNMP packets with its IP address from an NMS with  
any IP address.  
The unit transmits SNMP responses from either its SLIP port or to the  
remote unit depending on the direction from which the packet came.  
The IP address of the remote unit must be set to a non-zero value for this  
feature to work. This field is shown in Figure 4-19 on page 4-39.  
Save Configuration  
This option allows you to manually backup the database to EEPROM at  
any time To SAVE CONFIGURATION and backup the database to  
EEPROM, highlight SAVE CONFIGURATIONin the SYSTEM UTILITIES  
MENU, and press the Enterkey.  
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4
Tests  
The TESTS MENU allows you to initiate or stop four types of loopbacks for  
each individual network port: DTE/NETWORK LOOPBACK for the DTE,  
PAYLOAD LOOPBACK, LINE LOOPBACK, and LOCAL LOOPBACK. For  
troubleshooting suggestions see Troubleshooting the DL3800Eon page 6-  
3.  
To access the TESTS MENU, move the highlight bar to TESTS in the  
DL3800E unit Main Menu, and press Enter.  
Figure 4-20 is an example of the TESTS MENU. The individual loopbacks  
and operation of the menu are described below in the text following the  
menu.  
Major 01/01/90 04:58:17 Unit:  
Network 15 Minute UAS Major Threshold Exceeded  
Major 01/01/90 04:58:17 Unit: NET : 1 (114)  
Network 15 Minute UAS Major Threshold Exceeded  
0
NET : 2 (114)  
0
DIGITAL LINK DL3800E  
SR 2.00.00 NODE 7: 01/01/90 05:55:07 MJ  
SELECTED DEVICE ADDRESS: 7.00.000 NAME:  
DTE AND NETWORK TESTS  
DTE TESTS:  
Exit Confirm  
DTE/NETWORK LOOPBACK: Off  
NETWORK TESTS:  
PORT#  
PAYLOAD LOOPBACK  
LINE LOOPBACK  
LOCAL LOOPBACK  
1
2
3
4
5
6
7
8
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Figure 4-20 TESTS MENU  
Terminal Interface  
4-43  
 
4
To initiate a test, use the CURSOR keys to move the highlight bar to  
DTE/Network Loopbackor a Payloador Line Loopbackon a selected  
port. Use the space bar to toggle between OFF and ONuntil ON appears in  
the display. When that selection appears in the display, move the highlight  
bar to CONFIRM, and press the Enterkey. To cancel a test that is running,  
move the highlight bar to DTE/Network Loopback. Use the space bar to  
toggle between the options until OFF appears in the display. Move the  
highlight bar to CONFIRM, and press the Enterkey.  
DTE/Network Loopback  
The DTE/NETWORK LOOPBACK is a bi-directional loopback that loops  
the received DTE signal back to the DTE and the signal from the E1  
processor back towards the E1 network. This loopback is used to verify the  
operation of the DTE and associated cabling.  
Payload Loopback  
The payload loopback is used to verify proper E1 network operation of the  
DL3800E unit and the E1 network. The Payload Loopback loops the  
payload data received from the E1 network back towards the network. The  
data is regenerated, and a new framing pattern is inserted prior to being  
looped back. In this way the E1 framing of the unit and network can be  
verified.  
Line Loopback  
The line loopback is used to verify the operation of the E1 network. The  
line loopback loops the data received from the E1 network back towards  
the network. The data is regenerated prior to being looped back; however,  
no additional processing of the data is done by the DL3800E. This  
minimizes the impact of the DL3800E unit during this test so that network  
problems can be isolated.  
Local Loopback  
The local loopback is used to verify the operation of the DTE and  
connections. The local loopback loops the data received from the DTE back  
towards the DTE at the network interface.  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Figure 4-21 Loopbacks within the DL3800E unit  
Remote Loopback Detection  
The DL3800E has the capability of detecting loopbacks which are set on the  
remote 3800E or somewhere in the network line. When a remote loopback  
is detected, the 3800E removes the port from the DTE data bundle and  
reduces the DTE data rate, sets the port LED to yellow and changes the  
port status in the Alarms & Status menu to read Remote Lpbk. It also  
generates an SNMP alarm: enRemoteLpAlarm.  
When the remote loopback is cleared, the port is restored to DTE bundle  
and LED is restored to green. Port loopback status is cleared and the SNMP  
alarm (enRemoteLpAlarm) is idled.  
This loopback detection has some limitations. It will not work when a Unit  
Number of zero is set (factory default). Also, false remote loopback  
conditions will be reported on all ports if the remote Unit Number is the  
same as the local Unit Number  
NOTE: Remote loopback detection is disabled when the net is  
configured for Install/Test Only.”  
Terminal Interface  
4-45  
 
4
.
WARNING: The E1 Loopback tests will result in removal of the E1  
port from service unless the port is configured for Install/Test Only”  
mode. In this mode, a port in loopback will remain in service, which  
will disrupt traffic.  
Manual Network Restoration  
The DL3800Es E1 ports are normally set to auto restore. However, you  
may choose to individually restore E1 networks after they fail, through the  
MANUAL NETWORK RESTORATION MENU.  
NOTE: Manual restore will only work under the following conditions:  
1. If the port has previously been set to Use w/manual restore,in  
the Network Configuration screen.  
2. If the E1 is not in alarm. If the E1 is in alarm, you must first clear  
the alarm statistics in the STATISTICS MENU. To learn how to  
clear alarm statistics, see Statisticson page 4-11.  
To access the MANUAL NETWORK RESTORATION MENU (Figure 4-22  
on page 4-47) move the highlight bar to Manual Network Restoration in  
the CONFIGURATION MENU, and press Enter.  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
4
Major 01/01/90 04:58:17 Unit:  
Network 15 Minute UAS Major Threshold Exceeded  
Major 01/01/90 04:58:17 Unit: NET : 1 (114)  
Network 15 Minute UAS Major Threshold Exceeded  
0
NET : 2 (114)  
0
DIGITAL LINK DL3800E  
SELECTED DEVICE ADDRESS:  
SR 2.00.00 NODE 7: 01/01/90 05:55:07 MJ  
7.00.000 NAME:  
You must confirm to save changes.  
MANUAL NETWORK RESTORATION  
Exit Confirm  
PORT# RESTORE  
1
2
3
4
5
6
7
8
No Change  
No Change  
No Change  
No Change  
No Change  
No Change  
No Change  
No Change  
Figure 4-22 MANUAL NETWORK RESTORATION MENU  
To manually restore an E1 port (network), use the UP and DOWN ARROW  
keys to highlight the line item of the corresponding network port number.  
Toggle from No Changeto Restoreusing the Space Bar. Select Confirm,  
and press the Enterkey to save the changes.  
Logout  
This allows you to manually log off the unit, instead of waiting for the  
provisioned automatic logoff time for the unit to log off automatically.  
Highlighting LOGOUTand pressing Enterlogs you off the system.  
Terminal Interface  
4-47  
 
4
4-48  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Front Panel Interface  
5
5
GENERAL  
The front panel (Figure 5-1) features a 16 character vacuum fluorescent  
display and four buttons that help you to move through the various menus  
to configure the unit, perform tests, and obtain vital performance data. The  
front panel also features six LEDs for the DTE port, one for each of the E1  
networks, three for the DL3800E unit status and one for Network Test.  
Figure 5-1 DL3800E Front Panel  
DISPLAY OVERVIEW  
The DL3800E unit has a 16-character fluorescent front panel display. The  
left most character often provides an indication when the displayed  
message relates to a remote unit. A remote unit message is indicated by the  
character R followed by a comma (R,). When displaying a message relating  
to the local unit, this character position is a blank.  
BUTTON OVERVIEW  
The DL3800E unit has four front panel buttons. The unit generally  
responds to a button when it is pressed. Pressing and holding a button  
results in a repeating action after one-half second.  
END TEST  
EXIT  
ENTER  
5-1  
 
5
The front panel buttons are also used for Alarm Cutout. When an alarm  
condition occurs, the External Alarm Output contacts close. This typically  
actuates external alarm indicators such as bells or alarm lights. Pressing  
any of the four front panel buttons clears the condition, and turns off the  
external bell or light.  
Exit Button  
The EXIT button is used to cancel operations or exit to a higher level menu  
loop from a submenu loop. This button doubles as a left arrow button in a  
few situations.  
UP ARROW and DOWN ARROW Buttons  
The UP ARROW button is used to move to the previous menu item or  
configuration option.  
The DOWN ARROW button is used to move to the next menu item or  
configuration option.  
Pressing both the UP ARROW and the DOWN ARROW buttons  
simultaneously (the End Test combination), terminates all active tests on  
the local unit and brings the front panel menu to the TEST MENU showing  
the test that has just been terminated. If no tests are active, pressing the  
End Test combination has no effect.  
Enter Button  
The ENTER button is used to select a submenu loop or configuration  
option. This button doubles as the right arrow button in a few situations.  
5-2  
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5
Front Panel LEDs  
Table 5-1 Front Panel LEDs  
Indication  
Test  
Description  
Test In Progress LED  
No tests are in progress.  
A test condition exists.  
Off  
Solid Red  
Data Port LEDs  
TD  
Data DTE Activity LED. Represents pulses to DTE.  
Pulses are being detected.  
Green  
Off  
No pulses are being detected.  
RD  
Date DTE Activity LED. Represents pulses from DTE.  
Pulses are being detected.  
Green  
Off  
No Pulses are being detected.  
RTS/TA  
Yellow  
Off  
Request to send indicator, from DTE or TA (HSSI)  
RTS from DTE is active.  
RTS has been removed.  
CTS/CA  
Yellow  
Off  
Clear To Send indicator, to DTE or CA (HSSI)  
CTS to DTE is active.  
CTS has been removed, indicating that the DL3800E unit is not  
sending valid data.  
DTR  
Data Terminal Ready Indicator (N/A for HSSI)  
DTR from DTE is active.  
Yellow  
Off  
DTR from DTE is inactive.  
Test  
Indicates the port is in test mode.  
NOTE: The Test LED is off only when the port is not allocated  
bandwidth. It lights red when there is a HW DTE Loopback or  
DTE/NET Loopback in progress. It is connected to the TEST lead  
going from the DL3800E unit to the DTE, so both the LED and the  
lead carry the same data  
Network LEDs (T-1 through T-8)  
Red  
Network is in Red Alarm.  
Green  
Network is Active and running.  
Flashing Green  
The network is ready, but it is not part of the bundle to the DTE.  
Front Panel Interface  
5-3  
 
5
Table 5-1 Front Panel LEDs (Continued)  
Indication  
Flashing Green  
Yellow  
Description  
Network crossover is detected.(Check Front panel Display Menu)  
Network is in Loopback.  
Flashing Yellow  
Off  
Receiving yellow/AIS alarm.  
Network is inactive.  
Unit LEDs:  
Status  
Maj  
Display the status of the DL3800E, and whether the condition is a  
Major or Minor alarm.  
Min  
When a ports Active/Restore mode is set to Never Use and its  
alarm mode is set to Mask, then the port LED will be turned off.  
Access Levels And Protected Mode  
Front panel access can be limited by placing the DL3800E unit in the  
Protected Mode. In this mode, you can use the Front Panel User Interface  
only to monitor the status of the unit and its Error Counters, and view its  
configuration. The following operations cannot be performed through the  
Front Panel User Interface when the unit is in Protect Mode:  
Clearing the Error Counters.  
Changing the unit configuration.  
Starting or terminating diagnostic tests.  
The unit can be put into and out of Protected Mode through the Terminal  
User Interface, but not from the Front Panel User Interface. To place the  
unit in protect mode, toggle the Front Panel field to Off, in the UNIT  
CONFIGURATION MENU. Refer to Unit Configurationon page 4-17.  
When a user needs to take a unit out of Protected Mode but a terminal is  
not available, the following procedure can be used:  
1. Turn off the power to the unit.  
2. Press EXIT and the DOWN ARROW buttons at the same time.  
3. Turn the power to the unit back on.  
NOTE: The unit automatically performs a self test every time the unit is  
powered up.  
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DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
5
This procedure takes the unit out of the Protected Mode (and clears any  
password that may have been programmed) and sets all parameters to  
their default settings. To allow you to perform this procedure when the  
unit is in protected mode, the Protected Mode is ignored in the first sixty  
seconds after powering up. When in Protected Mode, the TEST MENU  
does not appear in the Main Menu.  
POWER UP AND RESET  
During power up initialization, the unit performs self test and displays a  
self-test message. Payload service resumes at the completion of Self Test.  
When the Self Test message is removed, the default message DL3800E  
Inverse Multiplexer appears on the display.  
TOP MENU  
NOTE: The menu system in the DL3800E unit is consistent with other  
Quick Eagle Networks products. Therefore, a user familiar with an  
existing product can easily operate the DL3800E. An example of a  
menu tree is shown below:  
The TOP MENU loop consists of five items: (1) DL3800E Inverse  
Multiplexer designation, (2) Select Remote/Local, (3) MONITOR MENU,  
(4) TEST MENU, and (5) CONFIGURATION MENU.  
Front Panel Interface  
5-5  
 
5
DL3800 Inverse Mux  
SELECT REMOTE  
DISPLAY  
ENTER  
EXIT  
Select Remote/Local  
Display Menu  
EXIT  
ENTER  
EXIT  
EXIT  
EXIT  
ENTER  
Test Menu  
TEST  
EXIT  
ENTER  
EXIT  
CONFIGURATION  
Configuration Menu  
EXIT  
This menu loop may also be entered at any time by pressing the Exit  
button to go up the menu hierarchy until reaching the TOP MENU.  
Continuing to press Exitwhile in the TOP MENU brings the unit to the  
default display DL3800E INVERSE MULTIPLEXERscrolling across the  
screen. Pressing the UP and DOWN ARROW buttons get you into the  
menu loop. A menu is selected by pressing Enterwhen the menu name  
appears on the display.  
The DISPLAY MENU is used for displaying Node Status, DTE Status, and  
Status of each installed E1 network. The 24-hour line data is only available  
with the terminal interface or through the Network Manager. The data in  
the DISPLAY MENU is a subset of the parameters that are available on the  
ALARM AND STATUS MENU through the terminal interface, or the  
Network Manager.  
The TEST MENU is used for DTE and Network loopbacks. The DL3800E  
unit does not allow performing tests on the remote unit through the front  
panel user interface. This feature is only available with the terminal  
interface.  
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5
The Configuration MENU is used to view and change the unit's  
configuration parameters, date and time, network interface parameters,  
and DTE interface parameters.  
Both the DISPLAY and CONFIGURATION MENUS are also able to access  
the remote unit. Remote monitoring and configuration are only available  
when there is an EML (Embedded Maintenance Link) channel to the remote  
unit. When you request status or configuration information from the  
remote unit, the local unit sends a request to the remote unit over ADL,  
and waits for a reply. While waiting for the reply, the local unit displays  
the message:  
PLEASE WAIT...  
On the front panel. If there is no reply from the remote unit within 10  
seconds, the display of the local unit will show:  
REMOTE NOT AVAILABLE  
Otherwise, the information reported by the remote unit will be displayed.  
SELECT REMOTE/SELECT LOCAL  
Pressing the DOWN ARROW cursor button when the default message is in  
the display brings the message SELECT REMOTEor R, SELECT LOCALto the  
display. This allows you to log onto either the local or remote DL3800E.  
When logged onto the local unit it displays SELECT REMOTE. When logged  
onto the remote unit, the display will read R,SELECT LOCAL. To change the  
DL3800E unit being monitored and controlled, press Enter. The message  
in the display blinks. Press Enteronce again to change from SELECT  
REMOTE to R,SELECT LOCAL or visa versa.  
NOTE: When logged onto the remote unit, an R, will appear as the  
first two characters in the display For example: R,NET1 STATISTICS  
DISPLAY MENU  
The DISPLAY MENU is used for displaying Node status, DTE status and  
the status of each installed E1 line. It is also used to clear the error counters  
(Clearing the error counters can only be done when the DL3800E unit is  
not in the Protected Mode).  
Front Panel Interface  
5-7  
 
5
DISPLAY MENU  
ENTER  
EXIT  
Use Arrow  
keys to view  
status.  
NODE STATUS  
EXIT  
EXIT  
EXIT  
EXIT  
EXIT  
ENTER  
EXIT  
Use Arrow  
keys to view  
status.  
DTE STATUS  
ENTER  
EXIT  
Use Arrow  
keys to view  
status.  
NET 1 STATUS  
NET 2 STATUS  
ENTER  
EXIT  
Use Arrow  
keys to view  
status.  
ENTER  
EXIT  
Use Arrow  
keys to view  
statistics.  
NET 1.STATISTICS  
NET 2.STATISTICS  
ENTER  
EXIT  
Use Arrow  
keys to view  
statistics.  
RETURN TO MAIN MENU  
DISPLAY ITEM  
NOTE: Only those E1 circuits physically installed (from two to eight)  
will have status lines in this menu.  
Node (Common Equipment) Status  
This display shows the status of the unit. NODE STATUS is accessed from  
the DISPLAY MENU by pressing Enterwhen NODE STATUSappears in the  
display.  
If one of more errors are detected, one or more of the following messages  
will appear. Use the UP and DOWN ARROW buttons to view the  
following messages, see Table 5-1 on page 5-9 for a list of those Common  
Equipment Alarm and Status items that could appear in this menu.  
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5
DTE Status  
The next display shows the status of the DTE data port. The menu is  
accessed by pressing Enterwhen DTE STATUSappears in the display.  
If errors are detected, one or more of the following messages will appear.  
Use the down and UP ARROW buttons to view further messages.  
See Table 4-2 on page 4-5 for a list of those Common Equipment Alarm and  
Status items that could appear in this menu.  
NET (1-8) Status  
The next eight displays show the status of the E1 Networks (NET 1  
STATUS through NET 8 STATUS if all are installed). Use the UP and  
DOWN ARROW buttons to select the E1 Network to be monitored and  
press Enter. Use the UP and DOWN ARROW buttons to view further  
status items relating to the same E1 circuit.  
See Table 4-2 on page 4-5 for a list of those Common Equipment Alarm and  
Status items that could appear.  
NET (1-8) Statistics  
The menu provides you with the various performance statistics of the  
individual E1 circuits. These performance statistics are listed and defined  
in Table 5-3. To view the statistics of a particular E1 circuit, press Enter  
when the display reads NET N.STATISTICS, where N is the number of the  
desired E1 network port.  
The following table lists and explains the information that can be viewed  
from the NET STATISTICS MENU, for each performance statistic:  
Table 5-2 NET STATISTICS MENU Information Display  
Front Panel Display  
Explanation  
NET N XXX  
XXX = the performance statistic.  
N = the E1 network port (1-8).  
SEC YYY VALID. Z  
YYY = the number of seconds into the current interval.  
Z = the number of valid 15 minute intervals since the error counters were reset  
(0-96).  
CUR. X  
TOTL. X  
X = the error count within a statistics period.  
X = the number of errors in the current interval.  
Front Panel Interface  
5-9  
 
5
Pressing the DOWN ARROW from any of these displays will step you  
through the last 96 15-minute intervals while displaying the number of  
errors in each of the interval. From the Net STATISTICS MENU, press  
Enter. When you see Net N CV,press Enteragain. The first display will  
read SEC. 455 VALID.8, showing the number of seconds in the current  
interval, and the number of valid 15 minute intervals since the error  
counters were last reset.  
Pressing the DOWN ARROW button from this point in the menu will show  
the number of Code Violations in the current interval (CUR 4). Pressing the  
DOWN ARROW will display the total number of errors since the registers  
were last reset (TOTL. 8). Pressing the DOWN ARROW from here will  
cycle you through the last 96 fifteen-minute intervals (or however many  
intervals exist since the counters were last reset), displaying the number of  
Code Violations in each interval, starting with the most recent, i.e., 1 = 0.  
The NET STATISTICS items are listed in Table 5-3.  
Table 5-3 NET Statistics Items  
Definition  
Parameter  
EFS  
Error Free Seconds (EFS) is calculated whenever ESR is calculated, and is the simple  
percentage complement of ESR: EFS = 100.0 - ESR. When there have been UAS in  
the statistics history for the past 24 hours, then EFS is set at 100%.  
ESR  
SESR  
BBER  
BPV  
FE  
Errored Second Ratio (ESR) is the ratio of ES to total seconds in available time during  
a fixed measurement interval. The fixed interval is the last 24 hours before the current  
15 minute interval. When there have been UAS in the statistics history for the past 24  
hours, then ESR is set at 0%.  
Severely Errored Second Ration (SESR) is the ratio of SES to total seconds in  
available time during a fixed measurement interval. The fixed interval to be used is  
the last 24 hours before the current 15 minute interval. When there have been UAS  
in the statistics history for the past 24 hours, then SESR is set at 0%.  
Background Block Error Ratio (BBER) is the ratio of errored blocks to total blocks  
during a fixed measurement interval, excluding all blocks during SES and unavailable  
time. The fixed interval is equal to the last 24 hours before the current 15 minute  
interval.  
This display provides the number of Bipolar Violations (BPVs) that have occurred  
during the accumulation period. A total of 15430 BPVs in a 10 second sliding  
window (approximately 10-3) will create a Major Alarm and 916 BPVs in a 600  
second sliding window (approximately 10-6) will create a Minor Alarm.  
A Frame Error (FE) is declared when two out of four consecutive framing bits are in  
error. Typically, an FE indication will be accompanied by a significant number of  
payload data bit errors. This display provides the number of FEs that have occurred  
in the accumulation period.  
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5
Table 5-3 NET Statistics Items (Continued)  
Parameter  
Definition  
EB/CV  
An Errored Block (EB) is a block in which one or more bits are in error. The EB if  
therefore equivalent to the Code Violation (CV) count calculated and displayed in the  
previous versions of the DL3800E. This count allows a user to monitor the rate of EB  
faults on a line that is unavailable.  
EBs are counted in the unavailable state; ES, SES, and BBE are not counted in the  
unavailable state.  
ES  
An Errored Second (ES) is a one second period with one or more errored blocks  
(such as one or more CRC4 errors) or an Out Of Frame (OOF). This display provides  
the number of ESs that have occurred in the accumulation period. ESs are not  
accumulated during UAS.  
SES  
Severely Errored Seconds (SES) is a one-second period which contains 30% or more  
errored blocks or at least one severely disturbed period (SDP). An SDP is present if  
either a LOS, AIAS, or LOF occurs.  
Since there are 1000 blocks per second, an SES is a one second period which  
contains either a combination of 300 or more CRC4 errors, an OOF, or at least one  
of the following: LOS, AIS, or LOF. This requirement is a slight change from the prior  
DL3800E unit SES definition, which required 320 or more CRC4 errors or LOS, AIS,  
or LOF. SESs are not accumulated during UAS.  
BBE  
A Background Block Error (BBE) is an errored block not occurring as part of an SES.  
A BBE is calculated and displayed as a raw count of non-SES EBs. The count is  
updated at the end of every measurement second excepting any second that is an  
SES. The updated count is discarded for all UAS.  
UAS  
Unavailable Seconds. This display provides the number of UAS that have occurred in  
the accumulation period. At the onset of 10 consecutive SES events, a period of  
unavailable seconds begins. These 10 seconds are part of the unavailable seconds  
count. At the onset of 10 consecutive non-SES events, a new period of available time  
begins. These 10 seconds are part of available time.  
UAS only occurs at the onset of 10 SES.  
ES, SES, and BBE are not counted during unavailable time. Rate parameters ESR,  
SESR, and BBER are the ratio of the fault-seconds count to the total seconds in  
available time.  
Front Panel Interface  
5-11  
 
5
TEST MENU  
The TEST MENU is used to activate network loopbacks and DTE  
loopbacks. The TEST MENU is only available when the unit is not in the  
Protected Mode.Tests are performed by selecting a test from the TEST  
MENU or one of the TEST submenus, and pressing Enter. To end all tests,  
press the END TEST button combination (UP and DOWN ARROW buttons  
simultaneously). When a test is selected that could apply to an E1 port, you  
are asked to specify to which fraction the test should apply. Only the local  
unit can be tested from the front panel. Testing the remote unit is limited to  
placing it in the Network Loopback Test.  
The TEST MENU is broken down into two types of submenus: DTE TESTS  
(one menu) and NETWORK TESTS (one for each network interface  
installed). Through these submenus, you initiate and stop various tests and  
loopbacks.  
The TEST MENU is accessed from the Main Menu by pressing Enter  
when TESTappears in the display. Pressing the down or UP ARROW  
button toggles through the three submenus. The submenus are accessed by  
pressing Enterwhen the appropriate menu appears in the display.  
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5
TEST MENU  
Strike ENTER to activate  
DTE/NET LOOP  
EXIT  
EXIT  
EXIT  
ENTER  
EXIT  
DTE TESTS  
DTE/NET LOOP  
Use Up/Down Arrows to select  
PAYLD, LINE or LOCAL Loopback.  
Strike ENTER to actiuvate.  
ENTER  
EXIT  
NET 1 TESTS  
NET 2 TESTS  
NET 3 TESTS  
LINE LOOPBACK  
Use Up/Down Arrows to select  
PAYLD, LINE or LOCAL Loopback.  
Strike ENTER to actiuvate.  
ENTER  
EXIT  
LOCAL LOOPBACK  
Use Up/Down Arrows to select  
PAYLD, LINE or LOCAL Loopback.  
Strike ENTER to actiuvate.  
EXIT  
ENTER  
EXIT  
LINE LOOPBACK  
Use Up/Down Arrows to select  
PAYLD, LINE or LOCAL Loopback.  
Strike ENTER to actiuvate.  
EXIT  
ENTER  
EXIT  
NET 4 TESTS  
PAYLD LOOP  
Return to Menu  
item: TESTS  
NOTE: A menu item will appear only for those E1 network interfaces.  
installed.  
Front Panel Interface  
5-13  
 
5
DTE TESTS  
Only one loopback can be initiated through the DTE TESTS MENU, a bi-  
directional DTE/NET Loopback.  
To access the DTE TESTS MENU from the TEST MENU, press Enterwhen  
DTE TESTSappears in the display.  
When in the DTE TEST MENU, pressing Enteraccesses the DTE/NET  
Loopback.  
DTE/NET Loopback  
The DTE/NET LOOPBACK is a bi-directional loopback that loops the  
received DTE signal back to the DTE and the signal from the E1 Main  
Board back towards the E1 Main Board. This loopback is used to verify the  
operation of the DTE and associated cabling, the DTE Board, and the link  
between the DTE Board and the E1 Main Board.  
To initiate a DTE/NET LOOP from the DL3800E unit front panel, press  
Enterwhen DTE/NET LOOPappears in the display.  
When a DTE/DTE LOOP is in operation, a plus signwill appear after  
DTE/NET LOOP in the display:  
DTE/Net Loop  
+
To end the loopback, press Enteragain while still in the DTE/NET  
LOOPBACK MENU.  
To cancel a test or loopback from any place in the Menu, press the END  
TEST button combination. However, this will cancel all tests and  
loopbacks currently in progress.  
Only one test can be performed at a time. To start a new test, the previous  
test must first be terminated.  
Use the Exitbutton to go out of the TEST MENU. Use the other buttons to  
go into the MONITOR or the CONFIGURATION MENUS to view the  
performance information or view and change the configuration of the unit  
while the test is in progress.  
While the test is active, the front panel TEST LED is on, reminding you  
that the unit is out of normal service condition. The test is terminated by  
pressing the END TEST button combination at any point in the menus.  
When this combination is pressed, the currently active test is canceled and  
the front panel display returns to the TEST MENU to the test that was just  
terminated.  
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5
Network Tests (1-8)  
Three NETWORK TESTS can be performed through this menu: PAYLOAD  
(PAYLD) LOOPBACK, LINE LOOPBACK and LOCAL LOOPBACK. To  
access NETWORK TESTS MENU from the TEST MENU, press Enter  
when NETWORK TESTS MENU for a particular E1 circuit (NET 1 through  
NET 8) appears in the display.  
When in a NETWORK TEST MENU, pressing the UP or DOWN ARROWs  
toggle between the three options, PAYLD, LINE, and LOCAL LOOPBACK.  
Payload Loopback  
The PAYLOAD LOOPBACK on the DL3800E unit is used to verify the  
proper operation of the E1 network and the DL3800E.  
To initiate a PAYLOAD LOOPBACK from the DL3800E, press Enterwhen  
PAYLD LOOPBACK appears in the display for the E1 (NET 1 through NET  
8) line to be looped back.  
When a PAYLOAD LOOPBACK is in operation, a plus sign will appear  
after the words PAYLD LOOPBACK in the display.  
Payload Loopback  
+
When the loopback is terminated, the plus signdisappears.  
To end the loopback, press Enteragain while still in the PAYLD  
LOOPBACK MENU.  
Front Panel Interface  
5-15  
 
5
Line Loopback  
The Lineloopback is used to verify the operation of the E1 network  
connection (E1 through E8). The line loopback loops the data received from  
the E1 network back towards the network. The data is regenerated prior to  
being looped back, however, no additional processing of the data is  
performed by the DL3800E. This minimizes the impact of the DL3800E unit  
during this test so that the problems can be isolated.  
To initiate a LINE LOOPBACK from the DL3800E, press Enterwhen LINE  
LOOPBACK appears in the display.  
When a LINE LOOPBACK is in operation, a plus signwill appear after  
the words LINE LOOPBACK in the display as shown below:  
Line Loopback  
+
To end the loopback, press Enteragain while still in the LINE  
LOOPBACK MENU. When the loopback is terminated, the plus sign  
disappears.  
NOTE: PAYLOAD and LINE LOOPBACKs will result in removal of the  
looped port from service, unless the port is configured for Install/Test  
Onlymode.  
Local Loopback  
The local loopback is used to verify the operation of the DTE and  
connections. The local loopback loops the data received from the DTE back  
towards the DTE at the network interface.  
To initiate a LOCAL LOOPBACK from the DL3800E, press Enterwhen  
LOCAL LOOPBACK appears in the display.  
When a LOCAL LOOPBACK is in operation, a plus signwill appear  
after the words LOCAL LOOPBACK in the display as shown below:  
Local Loopback +  
To end the loopback, press Enteragain while still in the LOCAL  
LOOPBACK MENU. When the loopback is terminated, the plus sign”  
disappears.  
You can cancel a test or loopback from any place in the menu by pressing  
the UP ARROW and DOWN ARROW at the same time. However, this will  
cancel all tests and loopbacks currently in progress.  
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5
CONFIGURATION MENU  
The CONFIGURATION MENU is used to back up the database and to  
view and change the unit and Comm Port Configuration parameters,  
network interface parameters, and DTE interface parameters. The remote  
unit configuration may also be viewed and changed.  
The DL3800E unit configuration can only be changed when the unit is not  
in the Protected Mode. In Protected Mode the configuration can only be  
viewed but not changed. To use the CONFIGURATION MENU, you select  
the configuration submenu from a hierarchical list, and presses Enter. You  
then proceed through the hierarchical menu structure to view or change  
the chosen parameters. When finished with the CONFIGURATION MENU,  
press Exit.  
Front Panel Interface  
5-17  
 
5
CONFIGURATION MENU  
EXIT  
ENTER  
BACKUP DATABASE  
BACKUP DATABASE  
EXIT  
Hit ENTER to Backup Database  
EXIT  
ENTER  
NODE CONFIG  
NODE CONFIG  
EXIT  
Use Up and Down Arrows to  
Select Conigurable Item  
EXIT  
EXIT  
ENTER  
DTE CONFIG  
DTE CONFIG  
EXIT  
Use Up and Down Arrows to  
Select Conigurable Item  
ENTER  
NETWORK CONFIG  
NETWORK CONFIG  
EXIT  
Use Up and Down Arrows to  
Select Conigurable Item  
EXIT  
EXIT  
ENTER  
NET 1 CONFIG  
NET 1 CONFIG  
EXIT  
Use Up and Down Arrows to  
Select Conigurable Item  
ENTER  
NET 2 CONFIG  
NET 2 CONFIG  
EXIT  
Use Up and Down Arrows to  
Select Conigurable Item  
EXIT  
ENTER  
NET THRESHOLDS  
NET THRESHOLDS  
EXIT  
Use Up and Down Arrows to  
Select Conigurable Item  
Return to Menu  
item: CONFIGURATION  
Table 5-4 CONFIGURATION MENU Items  
Definition  
Menu  
Backup Database  
Used to manually backup the database to EEPROM  
NODE CONFIG MENU  
Used to set the units ID, date, time, and communications port. It also shows  
you the hardware and software versions  
DTE CONFIG MENU  
Used to set the line mode for the DTE DATA port. It is also used to define  
whether the DTE signal is defined missing when the DTR and the RTS line is  
not asserted. Other options include DTE/DCE mode, V.35/RS449/X.21,  
and clocking option (SCTE/SCT Normal or SCT Invert)  
5-18  
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5
Table 5-4 CONFIGURATION MENU Items (Continued)  
Definition  
Menu  
NETWORK CONFIG  
MENU  
Used to set the operating mode (Inverse Mux or Single Line DSU), and  
clocking options of that are common to all E1 Network Ports.  
NET N CONFIG MENU  
Used to set various configurable items that are unique to each individual E1  
Network Port, including Framing Format, TS16, Alarm Reporting, Auto-  
Restore, and Equalization.  
NET THRESHOLDS MENU Allows you to enable/disable and set the values of the various Network  
Alarm Thresholds which, when exceeded, will cause the E1 lines to  
automatically be taken out of service.  
Node Configuration  
The NODE CONFIG MENU allows you to configure the NODE ID, NODE  
NUMBER, DATE & TIME and *NODE COMM PORT (Terminal). It also  
displays the NODE HW REV and the SOFTWARE REV, which are set by  
the factory.  
NOTE: Only the terminal comm port can be set through the front  
panel. The network management port is set through the ASCII terminal.  
The NODE CONFIG MENU is accessed through the CONFIGURATION  
MAIN MENU by pressing Enterwhen NODE CONFIGappears on the  
display. Pressing the DOWN ARROW or UP ARROW button toggles  
through the submenus.  
Pressing Enterwhen a selection is in the display allows you to view the  
present configuration. Pressing Enteragain will cause the entry to start  
blinking and allows you to change the selection if desired.  
To change the selection, use the DOWN ARROW and UP ARROW buttons  
to toggle through the choices. Pressing Enterselects the option that's in  
the display as the configuration. In the case of changing names and  
numbers, only one number or letter will blinkat a time. Only that  
number or letter can be changed. After each letter or number is selected,  
press Enterto confirm each change. The next letter or number space will  
then begin blinkingand be available for change. To abort any change,  
press Exitbefore you press Enter.  
Front Panel Interface  
5-19  
 
5
The NODE CONFIGURATION MENU is used to configure various  
parameters of the DL3800E, including the following.  
5-20  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
5
Table 5-5 NODE CONFIGURATION MENU Items  
Parameter  
Definition  
Unit ID  
The Unit ID is an alphanumeric designation up to 16 characters in  
length. The unit is shipped without a Unit ID.  
To access Unit ID from the NODE CONFIGURATION MENU,  
press Enterwhen Unit ID appears. Press Enteragain and the first  
space or letter blinks. Use the arrows to select the desired letter or  
number. Press Enteragain to confirm the selection, and move to the  
next letter or number  
Unit Number  
The Unit Number is a four digit number. The unit is shipped from the  
factory without a number.  
Note: Each unit must be set to a different number to allow remote  
communication and daisy chaining of multiple units. For example, if the  
remote unit is set to the same number as the local unit you will not be  
able to access the remote unit.  
To access the Unit Number, press Enterwhen Unit Number appears  
in the display. To enter or change the Unit Number, follow the same  
steps as in entering the Unit ID. The following entry should be added:  
REM Access ON/OFF  
Date & Time  
This enables or disables the capability that allows users to view and  
access the local configuration settings from the remote unit.  
The Date & Time are factory set to PST. The format in the display looks  
like: June 07, 1998 09:44:49  
To change the Date & Time, follow the procedure described under  
Node Configuration.”  
Node Comm Port  
Baud Rate  
These communications port parameters can be set through this display:  
Baud Rate, Parity, Data Bits, Stop Bits, Flow Control, Multidrop Mode.  
The BAUD RATE MENU is accessed through the NODE COMM PORT  
MENU. When the menu is first displayed, it will show the present Baud  
Rate: 38,400, 19,200, 9600, 4800, 2400, 1200, 600, or 300.  
Parity  
The PARITY MENU is accessed through the NODE COMM PORT  
MENU. When the menu is first displayed, it will show the present  
Parity: either No, Odd, or Even.  
Data Bits  
Stop Bits  
The DATA BITS MENU is accessed through the NODE COMM PORT  
MENU. When the menu is first displayed, it will show the present Data  
Bits configuration, either 7 or 8.  
The STOP BITS MENU is accessed through the NODE COMM PORT  
MENU. When the menu is first displayed, it will show the present Stop  
Bits configuration: either 1, 1.5, or 2.  
Front Panel Interface  
5-21  
 
5
Table 5-5 NODE CONFIGURATION MENU Items (Continued)  
Parameter  
Definition  
Local Terminal XON/XOFF  
With the Flow Control feature On, the terminal can request that the  
Terminal quit sending data when its buffers are full. The choices are Use  
or Ignore XON/XOFF  
Terminal Multidrop  
If the local terminal is connected to more than one DL3800E, it must be  
in Multidrop Mode. If it is connected to only one unit, this feature can  
be disabled. When it is disabled, the system comes up directly, without  
having to log in. The choices are Multidrop Mode and Direct Terminal.  
5-22  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
5
COMM PORT  
CONFIG  
Arrow keys change  
baud rate  
EXIT  
EXIT  
EXIT  
ENTER  
EXIT  
ENTER  
EXIT  
BAUD RATE 9600  
BAUD RATE 9600  
Arrow keys change  
parity  
ENTER  
EXIT  
ENTER  
EXIT  
PARITY EVEN  
PARITY EVEN  
Arrow keys change  
length of data bits  
ENTER  
EXIT  
ENTER  
EXIT  
DATA BITS 8  
DATA BITS 8  
Arrow keys change  
stop bits  
EXIT  
ENTER  
EXIT  
ENTER  
EXIT  
STOP BITS 2  
STOP BITS 2  
EXIT  
ENTER  
EXIT  
ENTER  
EXIT  
USE XON/XOFF  
USE XON/XOFF  
EXIT  
ENTER  
EXIT  
ENTER  
EXIT  
MULLTIDROP MODE  
MULTIDROP MODE  
To node configuration menu  
item: COMM PORT CONFIG  
Note that both the NODE HW (HARDWARE) REV and the NODE SW  
(SOFTWARE) REV are set at the factory and cannot be changed.  
Front Panel Interface  
5-23  
 
5
DTE Configuration Menu  
This menu allows you to set various configurable items for the DTE port.  
For each item on this menu, pressing the Enterbutton causes the  
configurable item to start flashing. Pressing the up arrow and DOWN  
ARROW buttons changes the value of the flashing item. Pressing Enter  
again terminates the configuration of that item. Pressing Exitaborts the  
operation without making the change. Each of the Configurable items are  
described in detail in Network Configurationon page 4-25.  
5-24  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
5
Front Panel Interface  
5-25  
 
5
Network Config  
The NETWORK CONFIG MENU allows you to change various  
configurable items common to all E1 network ports. For each item on this  
menu, pressing Entercauses the configurable item to start flashing.  
Pressing the up arrow and DOWN ARROW buttons changes the value of  
the flashing item. Pressing Enteragain terminates the configuration of  
that item. Pressing Exitaborts the operation without making the change.  
Each of the Configurable items are described, along with the various  
options, in detail in Network Configurationon page 4-25.  
5-26  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
5
Front Panel Interface  
5-27  
 
5
NET N Config  
The NET N CONFIG MENU allows you to change various configurable  
items common to all E1 network ports. The menu is shown below.  
For each item on this menu, pressing Entercauses the configurable item  
to start flashing. Pressing the up arrow and DOWN ARROW buttons  
changes the value of the flashing item. Pressing Enteragain terminates  
the configuration of that item. Pressing Exitaborts the operation without  
making the change. Each of the Configurable items are described in detail  
in Network Configurationon page 4-25 of this User Manual.  
NETWORK THRESHOLDS  
This Menu allows you to enable/disable the automatic FALLBACK feature  
and set the various Network Alarm Thresholds that will cause the E1 lines  
to automatically be taken out of service.  
Three levels of thresholds can be turned On or Off, and values set through  
this menu: CON (CONSECUTIVE), 15-minute, and 24-hour. Thresholds can  
be set for the number of Consecutive seconds (1-100) containing errors, for  
the number of seconds containing errors in a 15-minute interval (1-900),  
and for the number of 15-minute intervals containing errors in a 24-hour  
period (1-96).  
You can set the threshold value for Minor (MI) and Major (MJ) alarms,  
where exceeding the Minor alarm threshold will generate an alarm report  
and the exceeding a Major alarm threshold will actually cause an E1 line to  
be automatically taken out of service.  
5-28  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
5
Pressing Enterwhen NET THRESHOLDS appears in the display screen  
will start the menu and allow you to scroll, using the down or up arrow  
buttons, through the following options:  
Table 5-6 NET THRESHOLD Options and Values  
OPTION  
VALUE  
010  
OFF  
010  
ON  
015  
OFF  
100  
100  
OFF  
100  
100  
OFF  
100  
100  
OFF  
100  
100  
OFF  
100  
100  
OFF  
10  
CON CRCS  
CON CRCS  
CON SES  
CONSES  
CON UAS  
CON UAS  
15.MIN.MI.BPV  
15.MIN.MJ.BPV  
15.MIN.MJ.BPV  
15.MIN.MI.CRCS  
15.MIN.MJ.CRCS  
15.MIN.MJ.CRCS  
15.MIN.MI.ES  
15.MIN.MJ.ES  
15.MIN.MJ.ES  
15.MIN.MI.SES  
15.MIN.MJ.SES  
15.MIN.MJ.SES  
15.MIN.MI.UAS  
15.MIN.MJ.UAS  
15.MIN.MJ.UAS  
24.HR.MI.BPV  
24.HR.MJ.BPV  
24.HR.MJ.BPV  
24.HR.MI.CRCS  
24.HR.MJ.CRCS  
24.HR.MJ.CRCS  
10  
OFF  
10  
10  
OFF  
Front Panel Interface  
5-29  
 
5
Table 5-6 NET THRESHOLD Options and Values (Continued)  
OPTION  
VALUE  
10  
24.HR.MI.ES  
24.HR.MJ.ES  
24.HR.MJ.ES  
24.HR.MI.SES  
24.HR.MJ.SES  
24.HR.MJ.SES  
24.HR.MI.UAS  
24.HR.MJ.UAS  
24.HR.MJ.UAS  
10  
OFF  
10  
10  
OFF  
10  
10  
OFF  
To turn a Major Alarm ON or OFF, use the UP and DOWN ARROW  
buttons to get the specific alarm in the display window and press Enter.  
Using the arrow buttons, select ON or OFF. To change an alarm threshold  
value, use the UP and DOWN ARROW buttons to get to that particular  
alarm and press Enter. Use the Up or Down buttons to raise or lower the  
value.  
5-30  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Diagnostics  
6
6
EQUIPMENT RETURN AND REPAIR  
If faulty equipment is suspected, perform the tests in this section. If, after  
performing these tests, the DL3800E unit or any associated module is  
suspected to be faulty, call Quick Eagle Technical Support at (408) 745-4200.  
RUNNING DIAGNOSTIC TESTS  
You should test the DL3800E unit before you use it. If it, or an associated  
module, does not operate properly during or after testing, call Quick Eagle  
Networks Technical Support at: (408) 745-4200.  
This chapter contains procedures for testing the DL3800E unit followed by  
suggestions for troubleshooting problems.  
You use the DTE AND NETWORK TESTS MENU to initiate and terminate  
one DTE test and three network tests. The four tests are:  
DTE/NETWORK Loopback  
Payload Loopback  
LINE Loopback  
LOCAL Loopback  
NOTE: You do not need to inform the telephone company that youre  
running the tests. However, if the tests reveal a problem with a carriers  
service or with the DL3800E, you should inform the carrier that the DTE  
equipment or the DL3800E unit must be removed from service.  
To initiate a loopback test in the DTE AND NETWORK TESTS MENU,  
select TESTS from the INVERSE MULTIPLEXER MAIN MENU, and press  
Enterto open the menu.  
Select a test on a specific network port, set to ON, select CONFIRM, and  
press Enter.  
To terminate or cancel the test, select it, set to OFF, select CONFIRM, and  
press Enter.  
The example in Figure 6-1 shows the TEST MENU.  
6-1  
 
6
Major  
01/01/90  
Loss of Frame  
01/01/90  
17:56:47Unit: 1  
NET : 2(33)  
NET : 2(13)  
Idled  
17:56:58Unit: 1  
Loss of Frame Idled  
DIGITAL LINK DL3800E SR 1.XX NODE 1:HOME 01/01/90 03:14:54 MN  
SELECTED DEVICE ADDRESS: 1.00.000NAME:HOME  
DTE AND NETWORK TESTS  
DTE TESTS:  
Exit  
Confirm  
DTE/NETWORK LOOPBACK:Off  
NETWORK TESTS:  
PORT# PAYLOAD LOOPBACK LINE LOOPBACK LOCAL LOOPBACK  
1
2
3
4
5
6
7
8
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Figure 6-1 TESTS MENU  
NOTE: The following 3 tests interrupt payload traffic to the unit.  
DTE/Network Loopback Test  
Use the DTE/NETWORK Loopback test to verify the data port and  
associated cabling. This bi-directional loopback loops the received data  
port signal back to the data port and the received E1 processor signal back  
to the E1 network. It can test a problem whose source is the E1 line.  
LOCAL Loopback Test  
Use the LOCAL Loopback test to verify the operation of the DL3800E unit  
data port and its connections.  
To receive valid test data at the DTE device, run LOCAL Loopback on all  
active E1 ports.  
6-2  
DL3800E Inverse Multiplex Users Guide July 9, 2001  
 
6
Payload Loopback and Line Loopback Tests  
Use the PAYLOAD Loopback and LINE Loopback tests to verify the proper  
operation of the DL3800E unit and selected E1 networks.  
Both tests loop the payload data received from the E1 network back to the  
network.  
With the PAYLOAD Loopback, the DL3800E unit regenerates the data and  
inserts a new framing pattern before it loops back the data. This verifies  
the units E1 framing and the E1 network.  
With the LINE Loopback, the DL3800E unit does not do any additional  
processing of the data before it regenerates it and loops it back. This  
minimizes the involvement of the DL3800E unit during this test so that  
problems can be isolated to the network.  
PAYLOAD and LINE Loopbacks remove the port from the DTE data bundle  
unless the port is configured to Install/Test Onlymode.  
Possible Sources of Problems  
The PAYLOAD Loopback can test a problem whose source may be the  
DL3800E.  
The LINE Loopback can test a problem whose source may be the Telco E1  
line, wiring between the Telco demarcation points, the DL3800E unit at one  
or both ends, or the cable between the E1 line reporting errors and the  
DL3800E.  
The TEST LED on the DL3800E unit turns red during the tests, and the E1  
port LED turns yellow.  
TROUBLESHOOTING THE DL3800E  
This section describes problems you may encounter on the DL3800E unit  
and suggests ways you can troubleshoot them.  
The troubleshooting procedure is designed to isolate the faulty or  
malfunctioning item to the E1 network, the DTE equipment, the cable from  
the DTE to the DL3800E unit or the DL3800E unit itself. The built-in  
diagnostic features of the DL3800E unit aid you in quickly identifying and  
isolating faults.  
Using the front panel buttons and display, the ASCII terminal or SNMP  
workstation, you can run a series of loopback tests. Verification of the  
proper functioning of the DTE equipment and the DL3800E unit is  
Diagnostics  
6-3  
 
6
accomplished through DTE loopback and a self test. Testing for the  
proper functioning of the remote DL3800E unit is accomplished by a Line  
loopback.  
It is also possible to verify the path from the DTE through the E1 line to the  
remote-end DL3800E, provided the DTE equipment can generate and  
detect looped back bit streams.  
These suggestions can help determine which portion of the network might  
be at fault. When discovering a failure, check the simple solutions first. Is  
the power turned on? Is the equipment set up and configured properly?  
Will swapping cable pairs solve the problem?  
The DL3800E unit is equipped with alarms that alert you to the existence of  
possible problems with the unit, and received signals from the DTE or  
network. LEDs on the Module provide a quick indication of the status of  
that module: green light indicates everything is functioning normally.  
Table 6-1 Troubleshooting (1 of 5)  
Problem  
Solution  
DL3800E unit doesnt  
power up.  
If the DL3800E unit is AC powered, make sure it is plugged into a live AC  
outlet. If it is DC powered, make sure the respective DC leads are not  
crossed.  
Check all fuses for opens, replace as needed. If the DL3800E unit blows  
fuses continuously, call Quick Eagle Networks Technical Support.  
You cannot communicate  
with the remote DL3800E.  
Make sure both units are in Inverse Mux mode, not Single E1 DSU.  
Verify that the local and remote units have unique IDs.  
If a DTE device is not connected at either end, set DTE LOSS to None.  
Make sure your E1 port LEDs are solid green, indicating that the circuits are  
up and running.  
The TEST LED on the  
Make sure no tests are being initiated, and check the TEST display from a  
DL3800E unit is constantly terminal.  
on.  
If a test is running, end it by selecting the test and set it to Off in the DTE and  
NETWORK TESTS MENU.  
Make sure the DTE device or the E1 carrier is not sending loop up and loop  
down codes.  
6-4  
DL3800E Inverse Multiplex Users Guide July 9, 2001  
 
6
Table 6-1 Troubleshooting (2 of 5)  
Solution  
Make sure the E1 cable from your service provider is connected to the  
Problem  
The NETWORK E1 port  
LEDs on the DL3800E unit DL3800E.  
never illuminate.  
Make sure that the E1 port is set to configuration other than NEVER USE.  
Remove the E1 cable from the affected E1 port, and hardloop the interface  
by connecting pins 1-3 and 9-11 of the DB-15 port. If the E1 LED lights up,  
check your E1 cabling, and contact your service provider.  
The NETWORK E1 LEDs  
on the DL3800E unit are  
constantly red.  
Check each E1 port configuration to make sure the framing and line code  
are what the carrier is providing.  
Check each DL3800E unit for excessive errors.  
Check the E1 cabling or inside wiring for possible problems.  
Verify with the service provider that the local Smart Jack is not looped up.  
Perform the hardloop procedure on the affected E1 port to verify that the E1  
port is functioning on the unit.  
The NETWORK E1 LEDs  
are constantly yellow.  
Make sure no tests are being initiated on the affected E1ports.  
Individual E1 port tests cause the E1 LED to turn yellow.  
If a test is running, end it by selecting the test, and setting it to Off in the DTE  
and NETWORK TESTS MENU.  
Verify that the DTE device, the E1 carrier, or the remote unit is not sending  
loopup and loopdown codes (check the Alarm & Status Menu).  
The NETWORK E1 LEDs  
are flashing yellow.  
Check the CURRENT ALARMS AND STATUS ITEMS MENU to see if the unit  
is receiving an E1 yellow alarm or an Alarm Indication Signal (AIS).  
Make sure the remote unit is receiving a valid E1. If it is not, it will transmit  
a yellow alarm.  
Diagnostics  
6-5  
 
6
Table 6-1 Troubleshooting (3 of 5)  
Solution  
Problem  
The NETWORK E1 LEDs  
on an DL3800E unit are  
flashing green.  
Make sure a valid DTE device is connected to the DL3800E, and is powered  
on.  
If no DTE device is connected and the unit is configured for V.35 or RS449,  
make sure that DTE LOSS is set to None. If the unit is configured for HSSI,  
check for a valid HSSI signal (TA).  
If a DTE device is connected, make sure all DTE port LEDs are on.  
Check the CURRENT ALARMS AND STATUS ITEMS MENU to make sure no  
alarm thresholds have been exceeded.  
An E1 circuit is taken out of service for a configured amount of time if  
Fallbacks (in Network Alarm Thresholds) or Second Error Restoral Interval (in  
Network Configuration) is enabled, and a threshold has been exceeded.  
Make sure that the correct E1 cable is connected to the correct E1 port.  
Make sure that the E1 lines are not crossed (Check Alarms & Status Menu).  
You must restore the E1 line manually if it is configured for use w/Manual  
Restore (in Network Configuration), and a threshold or alarm condition has  
been exceeded.  
The DTE port LEDs on the Make sure the correct DTE cable is securely attached to both units, and the  
DL3800E unit do not  
illuminate.  
connected DTE device is actually passing traffic.  
If the connected DTE device does not support the RTS or DTR leads,  
configure the DTE LOSS for None. This asserts the CTS lead from the  
DL3800E.  
Make sure the DL3800E unit is configured for the correct electrical signaling  
from the DTE device: V.35, RS449, HSSI or x.21.  
The UNIT Major and  
Minor Alarm LEDs on the  
Alarm thresholds may have been exceeded for the 15 minute or 24 hour  
periods. If other thresholds have not been exceeded, the DL3800E unit  
DL3800E unit do not clear. automatically clears these alarms after the period has passed.  
6-6  
DL3800E Inverse Multiplex Users Guide July 9, 2001  
 
6
Table 6-1 Troubleshooting (4 of 5)  
Solution  
The connected DTE device Run a DTE/NET Loopback to verify the physical connection between the  
Problem  
shows intermittent errors.  
local DTE device and the DL3800E.  
If errors are reported during this loopback, check the DTE cable.  
Make sure the DTE device supports the DTE port clocking option.  
Use SCTE clocking for the DTE device if the application is using V.35, and  
the DL3800E unit has more than two connected E1 circuits.  
Try inverting DTE Tx clock and/or Rx clock when in v.35/RS-449 or x.21  
modes.  
Make sure the DTE device can handle the set DTE clocking speed.  
Make sure the DTE device can run to a DCE in loopback.  
The DTE/NETWORK  
Loopback does not work  
towards the locally  
If configured for SCTE, the DTE device must be able to support SCTE clock.  
If it does not, set the clocking to SCT.  
connected DTE device.  
Make sure that the Transmit or Receive clock is inverted.  
Make sure the DTE device does not need to see RLSD (RECEIVE LINE SIGNAL  
DETECTED) during this loopback. If it does, set RLSD in the DTE  
CONFIGURATION MENU to ASSERT this lead.  
The DL3800E unit has  
timing and synchronization  
problems.  
Make sure the timing source is set properly.  
If the clock source is provided by the circuit provider, set XMT PRIMARY  
CLOCK SOURCE to Net, and RCV to the E1 network providing the clocking.  
If the clocking is expected from a specific E1 circuit but the circuit is not in  
service, set RCV PRIMARY CLOCK SOURCE to AUTO.  
If the clock source is not provided by the circuit provider, set XMT PRIMARY  
CLOCK SOURCE to INT and the remote unit XMT PRIMARY CLOCK SOURCE  
to NET, and RCV to AUTO.  
Make sure the proper E1 cables are plugged into the corresponding ports on  
the DL3800E.  
Diagnostics  
6-7  
 
6
Table 6-1 Troubleshooting (5 of 5)  
Solution  
Problem  
You cannot access the  
DL3800E unit from a  
terminal.  
The terminal must be running a VT100 or compatible terminal emulation  
program.  
Make sure you are using a straight through cable with pin 8 CTS cut at the  
terminal end.  
Make sure the Comm Port parameters match the terminals, and the  
DL3800E unit has a unique ID. If the DL3800E unit is in a daisy-chain, you  
can display a roll call of all unit numbers by pressing Ctrol-x five times.  
6-8  
DL3800E Inverse Multiplex Users Guide July 9, 2001  
 
Specifications  
A
A
E1 NETWORK INTERFACE  
Parameter  
Setting  
Interface Type  
E1  
Number of Ports  
Framing Formats  
Line Code  
2, 4, 6 or 8  
CRC4 (Enabled or Disabled)  
HDB3  
Transmit Line Rate  
Receive Line Rate  
Synchronization  
Network Connector  
2.048 Mbps 50 ppm  
2.048 Mbps 75 ppm  
Internal, Loop-timed, or External  
DA-15 Socket or BNC connectors  
EXTERNAL CLOCK INTERFACE  
Parameter  
Rate  
Setting  
2.048 MHz 50 ppm  
Connector Type  
Input Impedance  
Input Voltage  
DE-9  
10 k9  
7 V per RS-422 Standard (Balance)  
A-1  
 
A
DTE INTERFACE  
Item  
Interface  
Electrical Interface  
Rate  
HSSI or V.35/RS-449/X.21  
Up to 15.808 Mbps  
Connector Types  
DB-25 Socket (V.35/RS449/X.21)  
50-pin Socket Amplimite (HSSI)  
Number of Ports  
One  
COMM PORT  
Item  
Interface  
Interface Devices  
Protocol  
Terminal or Modem  
ASCII (VT100)  
Electrical  
RS-232 Socket (DE-9)  
NMS PORT (SNMP)  
Item  
Interface  
Interface Devices  
Protocol  
SNMP Manager  
SNMP (UDP/IP) over SLIP  
RS-232 (DE-9)  
Electrical  
A-2  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
A
FRONT PANEL  
Item  
Interface  
Display  
16 Character Alphanumeric  
Four Keys  
Key Pad  
DTE Status LEDs  
TEST Status LEDs  
Unit Status LEDs  
TD, RD, RTS (TA), CTS (CA), HSSI, TEST, T1-T8  
TEST  
Status MAJ MIN  
DIAGNOSTICS  
Item  
Interface  
Loopbacks  
Self Test  
Alarms  
DTE/Network, Payload, Line, Local  
Checks Unit Circuitry and Memory on power up  
Relay, dry contact  
Lamp Test  
Press Exit and Enter key at the same time.  
POWER  
Power  
Setting  
AC Input  
90 VAC, 0.5 A Max 264 VAC, 0.25 A Max  
DC Input (Optional)  
Power Consumption  
-40 VDC to -75 VDC  
40 W Maximum  
ENVIRONMENTAL  
Item  
Temperature  
o
o
Operating Temperature  
0 C to 50 C  
Specifications  
A-3  
 
A
Item  
Temperature  
o
o
Storage Temperature  
Relative Humidity  
Altitude  
-20 C to 60 C  
0 to 95% Noncondensing  
-200 ft to 10000 ft (-60.1 m to 3.048 km) above sea level  
8 years.  
MTBF  
PHYSICAL /CONNECTORS  
Item  
Dimensions  
Mounting  
Dimensions  
19-inch or 23-inch rack mounting or Standalone  
17.2 in W x 2.8 in H x 11in D  
(43.7 cm W x 7.1 cm H x 27.9 cm D)  
EXTERNAL ALARM CONTACTS  
DB-9  
Alarm Designations  
Alarm In (+)  
Alarm In (-)  
Major NO  
Signal  
1
3
4
5
9
2
7
6
8
Input  
Input  
Normally Open Output  
Common  
Major Common  
Major NC  
Normally Closed Output  
Normally Open Output  
Common  
Minor NO  
Minor Common  
Minor NC  
Normally Closed Ouput  
Not Connected  
A-4  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
A
The External alarms are used to turn on a Bell or Light to indicate that an  
alarm has occurred on the DL3800E. Either the Major, Minor, or both can be  
wired to the DB-9 Connector on the back.  
Normally Open (Major or Minor) The Alarm is off when there is an  
open on the alarm circuit. Will indicate an alarm when the circuit is closed.  
Normally Closed (Major or Minor) The alarm is off when there is a short  
on the alarm circuit. Will indicate an alarm when the circuit is open.  
Alarm In This alarm can be used to indicate to the DL3800E unit that an  
external alarm has occurred such as a door opening or closing. This would  
require the customer to use a 48V volt supply to drive the alarm.  
Specifications  
A-5  
 
A
A-6  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Pinouts  
B
B
TERMINAL CONNECTION  
Table B-1 COMM and NMS Port Pin Assignments  
SIGNAL  
DIRECTION  
To Terminal  
PIN  
Receive Data  
Send Data  
2 RD  
3 SD  
From Terminal  
Clear to Send  
Signal Ground  
To Terminal (Connect between units, but not to the Terminal) 8 CTS  
(Bidirectional) 5 SG  
DCE CONNECTORS  
Table B-2 HSSI DCE Connector Pin Assignments  
PIN #  
DIRECTION +SIDE  
PIN #  
- SIDE  
SIGNAL  
SG - Signal Ground  
RT - Receive Timing  
CA - DCE Available  
RD - Receive Data-  
Reserved future  
1
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39-43  
To DTE  
To DTE  
To DTE  
To DTE  
To DTE  
2
3
4
5
ST - Send Timing  
SG - Signal Ground  
TA-DTE Available  
TT - Terminal Timing  
LA - Rollback Circuit A  
SD - Send Data  
6
7
From DTE  
From DTE  
From DTE  
From DTE  
From DTE  
8
9
10  
11  
12  
13  
14-18  
LB - Rollback Circuit B  
SG - Signal Ground  
5 ancillary to DCE  
From DTE  
B-1  
 
B
Table B-2 HSSI DCE Connector Pin Assignments (Continued)  
PIN #  
DIRECTION +SIDE  
PIN #  
- SIDE  
SIGNAL  
SG- Signal Ground 5  
ancillary from DCE  
19  
44  
5 ancillary from DCE  
SG - Signal Ground  
To DTE  
20-24  
25  
33-49  
50  
CHANNEL 1 DATA CABLE PIN ASSIGNMENTS  
The pin assignments for the V.35, M-34 to DB-25 DTE cable are listed in  
Table B-3.  
Table B-3 V.35, M-34 to DB-25 DTE Cable Pin Assignments  
M-34  
T
DB-25  
16  
3
Signal Name  
RD B  
Signal  
To DTE  
To DTE  
From DTE  
From DTE  
To DTE  
From DTE  
DTE  
R
RD A  
S
14  
2
SD B  
P
SD A  
E
6
DSR  
H
K
20  
25  
7
DTR  
TM  
B
Signal Ground  
CTS  
NA  
D
5
To DTE  
To DTE  
To DTE  
To DTE  
To DTE  
To DTE  
From DTE  
From DTE  
From DTE  
NA  
F
8
RLSD  
V
17  
9
SCR A  
SCR B  
SCT A  
SCT B  
SCTE A  
SCTE B  
RTS  
X
Y
15  
12  
24  
11  
4
AA  
U
W
C
A
NC  
Frame Ground  
B-2  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
B
Table B-4 EIA-530, DB-25 to DB-25 DCE Connector Pin Assignments  
DB-25  
DB-25  
SIGNAL  
17  
35  
24  
11  
SCTE  
7
25  
4
19  
RTS  
RD  
24  
6
16  
3
22  
4
14  
2
TD  
11  
18  
6
25  
DSR  
CTS  
RLSD  
SCR  
SCT  
SG  
27  
8
13  
5
13  
31  
8
10  
26  
8
9
17  
5
23  
15  
12  
19  
7
NC  
NC  
1
NC  
FG  
Pinouts  
B-3  
 
B
DB-25 to DC-37 Data Port Cable Pin Assignments  
The pin assignments for the DB-25 to DC-37 Data Port cable are listed in  
Table B-5.  
Table B-5 DB-25 to DC-37 Data Port Cable Pin Assignments  
DC-37  
17  
35  
7
DB-25  
24  
11  
4
Signal Name  
TT A  
Signal  
From DTE  
From DTE  
From DTE  
From DTE  
To DTE  
TT B  
RS A  
25  
6
19  
3
RS B  
RD A  
24  
4
16  
2
RD B  
To DTE  
SD A  
From DTE  
From DTE  
To DTE  
22  
11  
29  
9
14  
6
SD B  
DM A  
DM B  
CS A  
22  
5
To DTE  
To DTE  
27  
12  
30  
13  
31  
8
13  
20  
23  
8
CS B  
To DTE  
TR A  
To DCE  
To DCE  
To DTE  
TR B  
RR A  
10  
17  
9
RR B  
To DTE  
RT A  
To DTE  
26  
5
RT B  
To DTE  
15  
12  
7
SCT A  
SCT B  
Signal Ground  
Frame Ground  
TM  
To DTE  
23  
19  
1
To DTE  
NA  
NC  
25  
From DTE  
To DTE  
18  
B-4  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
B
COMMUNICATION PORT PIN ASSIGNMENTS  
RS-449, DC-37 to DB-25 DCE Cable Pin Assignments  
Table B-6 describes the RS-449, DC-37 to DB-25 DCE cable pin  
assignments.  
Table B-6 RS-449, DC-37 to DB-25 DCE Cable Pin Assignments  
DC-37 DB-25  
8
24  
11  
4
26  
13  
31  
22  
4
19  
16  
3
24  
6
14  
2
12  
30  
29  
11  
25  
7
6
22  
23  
20  
10  
8
35  
17  
19  
NC  
9
17  
7
1
Pinouts  
B-5  
 
B
E1 NETWORK PIN ASSIGNMENTS  
The network connector is a DA-15 connector. The assignments for the  
Network connector are given below.  
Table B-7 Network Pin Assignments  
PIN  
1
SIGNAL  
Send towards Network Tip (T1)  
Send towards Network Ring (R1)  
Frame Ground  
9
2
3
Receive from Network Tip (T)  
Receive from Network Ring (R)  
Frame Ground  
11  
4
5,6,7,8,10,12,1314,15  
Not Connected  
DB-25 TO DE-9 ADAPTER PINOUTS  
An adapter is available from Quick Eagle Networks that will allow the  
Quick Eagle Networks DE-9 ribbon cable to be compatible with a DB-25  
connector on the terminal port.  
Table B-8 DB-25 to DE-9 Pinouts  
DB-25  
DE-9  
3
2
3
2
4
7
5
8
6
6
7
5
8
1
23  
21  
9
4
B-6  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
B
X.21 TO DB-25 CABLE PINOUTS  
Table B-9 DB-25 to DB-15 Pinouts  
X.21  
3
Signal Name  
Control (A)  
DB-25  
4
10  
4
Control (B)  
19  
3
Rx DAta (A)  
11  
2
Rx Data (B)  
16  
2
Send Data (A)  
Send Data (B)  
9
14  
8
5
Indication (A)  
12  
6
Indication (B)  
10  
17  
9
Serial Clock Rx (A)  
Serial Clock Rx (B)  
Serial Clock External (A)  
Serial Clock External (B)  
Signal Ground  
13  
*7  
*14  
8
24  
11  
7
* Needs to be wired in when using X.21 with SCTE.  
EXTERNAL CLOCK CONNECTOR PIN ASSIGNMENTS  
A DE-9 connector is provided on the DL3800E unit rear panel for  
connection to an External Clock. Pin Assignments for the External Clock  
connector are as Listed in Table B-14:  
Table B-10 External Clock Pinouts  
PIN  
1
SIGNAL  
Signal A  
Signal B  
2
5
Shield  
3,4,6,7,8,9 No Connection  
Pinouts  
B-7  
 
B
Per RS-422 requirements, the receiver has an input sensitivity of 200 mV  
over the input voltage range of 7 V. The frequency is 2.048 MHz  
50 ppm, and the impedance is 10 kW.  
B-8  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
B
ALARM PINOUT  
Pin Assignments for the Alarm connector are as follows:  
Table B-11 Alarm Pinout  
PIN  
SIGNAL  
5
Maj Comm  
Maj NC  
Maj NO  
9
4
8
not connected  
Alarm in -  
Min Comm  
Min NO  
3
7
2
6
1
Min NC  
Alarm in +  
Maj  
Min  
NC  
-
Major  
Minor  
-
-
Normally Closed (unless alarm condition is true  
this pin is connected to the appropriate comm pin)  
NO  
-
Normally Open (only during an alarm condition  
will this be connected to the appropriate comm  
pin)  
-
-
Alarm in  
input for an alarm to the device  
The above table shows the signal names and pin connections. These  
outputs of Major alarms normally open and normally closed, Minor alarms  
normally open normally closed, and Alarm in + & - are done through  
relays and an optoisolators respectively. They are designed for -48v,  
although a lower voltage should work equally well.  
Pinouts  
B-9  
 
B
DC POWER CONNECTIONS  
Figure B-1 DC Power Connections  
DTE CLOCK RATES  
Table B-12 DTE Clock Rates  
NETWORKS  
DTE CLOCK RATE, MBPS  
1.976  
TSLOT16= DATA  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
3.952  
5.928  
7.904  
9.880  
11.856  
13.832  
15.808  
1.912  
TSLOT=FLAG  
3.824  
5.736  
7.648  
9.560  
11.472  
13.384  
15.296  
B-10  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Factory Default Settings C  
C
Table C-1 Unit Settings  
Unit  
Setting  
ALARM ENABLE  
Disabled  
AUTOMATIC BACKUP  
5 minutes after each database  
change  
FRONT PANEL  
On  
UNIT NUMBER  
0
TERMINAL BAUD RATE  
TERMINAL PARITY & BITS  
TERMINAL STOP BITS  
XON/XOFF  
9600  
8 bits, No parity  
2
Enabled  
Enabled  
MULTIDROP  
Table C-2 DTE Settings  
DTE  
Setting  
V.35  
DTE INTERFACE  
CLOCK  
SCTE  
TX CLOCK  
Normal  
Normal  
Automatic  
Automatic  
Automatic  
Automatic  
RTS  
RX DLOCK  
RLSD MODE  
DSR MODE  
CTS MODE  
TM MODE  
DTE LOSS DETECTION  
C-1  
 
C
Table C-3 Network Settings  
Network  
Setting  
ALARM  
Mask  
ACTIVE/RESTORE MODE  
FRAME  
Never Use  
CRC4  
LINECODE  
HDB3  
TSLOT 16  
DATA  
NATIONAL BIT  
PRIMARY CLOCK SOURCE  
SECONDARY CLOCK SOURCE  
DSU MODE  
1-5  
Xmt Int. Rcv Net 1  
Xmt Int. Rcv Net 2  
Inverse Mux (Standard  
Operation)  
SUPPRESS YELLOW DET  
Disabled  
Table C-4 Network Threshold Settings  
Network Threshold  
Setting  
CONSECUTIVE THRESHOLDS  
Fallback Disabled, Seconds 10  
Fallback Disabled  
INTERVAL THRESHOLDS (15  
MIN)  
Seconds  
Major 100  
Minor 100  
INTERVAL THRESHOLDS (24 HR) Fallback Disabled  
Seconds  
Major 10  
Minor 10  
Table C-5 SNMP Configuration Settings  
SNMP Configuration  
ALL ADDRESSES  
Setting  
0.000.000.000  
Public  
READ COMMUNITY STRING  
WRITE COMMUNITY STRING  
TRAP COMMUNITY STRING  
SNMP BAUD RATE  
Public  
Public  
9600  
C-2  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
C
Table C-5 SNMP Configuration Settings  
SNMP Configuration  
Setting  
BITS & PARITY  
STOP BITS  
8 bits, No parity  
2
Table C-6 Test Settings  
Tests  
Setting  
Off  
ALL LOOPBACKS & TESTS  
Factory Default Settings  
C-3  
 
C
C-4  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Glossary  
G
G
A
ABAM  
A designation for 22-gauge, 110-ohm, plastic-insulated, twisted-pair Western  
Electric cable normally used in central offices.  
AIS (Alarm Indication Signal)  
An unframed sequence of All Ones normally sent by a DSU/CSU that cannot  
maintain the required pulse density in AMI mode or sent by a CSU that has a  
loss of signal condition on its data port. The signal is sent to maintain  
continuity of transmission and to notify the far-end that a transmission fault  
exists on the line. Same as Blue Alarm.  
alternate loop code  
Used to invert loop codes from U.S. standard code; inverts zeros to ones and  
ones to zeros.  
AMI (Alternate Mark Inversion)  
A line code in which the signal carrying the binary value alternates between  
positive and negative polarities.  
ANSI (American National Standards Institute)  
Coordinates the development of U.S. voluntary national standards in both the  
private and public sectors. Standards pertain to programming languages, EDI,  
telecommunications and physical properties of diskettes, cartridges and  
magnetic tapes.  
ASCII (American National Standard Code)  
The standard and predominant seven-bit (eight bits with parity) character code  
used for data communications and data processing.  
asynchronous transmission  
Transmission not related to a specific frequency, or to the timing of the  
transmission facility.  
attenuation  
Reduction or loss of signal strength, measured in decibels; opposite of gain.  
G-1  
 
G
B
B8ZS (Bipolar 8 Zero Substitution)  
A technique used to accommodate the ones density requirements of T1  
transmission.  
bandwidth  
The data-carrying capacity of a transmission medium, usually measured in  
Hertz (Hz), which equals cycles per second.  
baud  
BER  
A measurement of the signaling speed of a data transmission device.  
See bit error rate.  
BES (Bursty Errored Seconds)  
Occurs when a second has 320 or more CRC violations. (ESF format only)  
bipolar  
The predominant signaling method used for digital transmission services, such  
as DDS and T1, in which the signal carrying the binary value successively  
alternates between positive and negative polarities. Zero and one values are  
represented by the signal amplitude at either polarity, while no value spaces”  
are at zero amplitude.  
bit error  
Occurs when the value of an encoded bit is changed in transmission, and  
interpreted incorrectly by the receiver.  
Bit Error Rate (BER)  
The percentage of received bits that are in error, relative to a specific amount of  
bits received; usually expressed as a number referenced to a power of 10.  
bps  
Bits per second; the basic unit of measure for serial data transmission capacity;  
Kbits (kilobits) for thousands of bits per second; Mbitps (megabits) for millions  
of bits per second, and Gbits (gigabits) for billions of bits per second.  
Blue Alarm  
An unframed sequence of All Ones normally sent by a DSU/CSU that cannot  
maintain the required pulse density in AMI mode or sent by a CSU that has a  
loss of signal condition on its data port. The signal is sent to maintain  
continuity of transmission and to notify the far-end that a transmission fault  
exists on the line. Same as Alarm Indication Signal (AIS).  
G-2  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
G
broadband  
Services or interfaces that operate above the T1 data rate, typically at NxT1, T3,  
SONET, or ATM speeds.  
BPV (Bipolar Violation)  
Occurs when the ones bit is not represented with the opposite signal of the  
previous ones bit.  
C
CCITT  
International Telegraph and Telephone Consultative Committee.  
central office (CO)  
The phone company switching facility or center; usually a Class 5 end office, at  
which subscribers' local loops terminate.  
channel  
A physical or logical path allowing the transmission of information; the path  
connecting a data source and receiver.  
circuit  
Generally referring to a transmission medium connecting two or more  
electronic devices.  
clear channel  
A characteristic of a transmission path or digital circuit in which the full  
bandwidth is available to you. The phone company does not use any portion of  
the bandwidth for framing or control bits.  
clock  
An oscillator-generated signal providing a timing reference for a transmission  
link; used to control timing functions such as sampling interval, signaling rate  
and duration of signal elements.  
code conversion  
The process of changing the bit grouping for a character in one code into the  
corresponding bit grouping for the character in another.  
CMI (Control Mode Idle)  
The process of changing the grouping for a character in one code into the  
corresponding bit grouping for the character in another.  
communications port (Comm Port)  
The electrical interface between a unit and the operators terminal. Operator  
commands and responses can be communicated through the Comm Port.  
Glossary  
G-3  
 
G
connector  
A physical interface, such as DB-15 or RS-232-C, typically with male or female  
components.  
CPE (Customer Premises Equipment)  
Equipment that interfaces the telephone network and physically resides at  
your location.  
CRC (Cyclic Redundancy Check)  
An error checking scheme used to check the received data. The CRC bits  
within the framing are calculated using the contents of the frame. The  
calculation is performed again when the frame is received and the CRC values  
are compared. If they do not match, the frame is considered bad and the CRC  
statistic is incremental. Performance checking is done by both the carrier and  
the customer without causing any interference with the T-1 traffic.  
CSU (Channel Service Unit)  
The CPE used to terminate a digital circuit at the customer site. The CSU  
performs certain line-conditioning functions, ensures network compliance to  
FCC rules and responds to loopback commands. It ensures proper ones density  
in the bit stream and performs bipolar violation correction. The DSU and CSU  
are often in the same unit.  
CTS (Clear to Send)  
A signal issued by the DSU to indicate it is connected to the digital network  
and is ready to accept data.  
CV (Code Violation)  
Any code violation.  
D
D4  
Framing format for T1 transmission that places 12 T1 frames into a superframe.  
In ESF (a newer framing format) frames consist of 24 bits instead of the  
previous standard 12 bits as in D4 format.  
DACS (Digital Access Cross-Connect Switch)  
A digital switching device for routing and switching T1 lines and DS-0 portions  
of lines among multiple T1 ports. DACS performs all the functions of a normal  
switch, except that connections are typically set up in advance of a call, not  
together with a call, as in most, normal low-bandwidth communications  
systems (e.g. voice-band voice and data). A DACS is in essence a manual T-1  
switch.  
G-4  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
G
data link  
Any serial data communication transmission path, generally between two  
adjacent nodes or devices and without any intermediate switching nodes.  
data link layer  
In the OSI model, the network processing entity that establishes, maintains and  
releases data link connections between adjacent elements in the network.  
DCE (Data Circuit-Terminating Equipment)  
Equipment that is either a part of the network, an access point to the network,  
a network node, or equipment at which a network circuit terminates.  
dial-up  
Describing the process of, or the equipment or facilities involved in,  
establishing a temporary connection via the switched telephone network.  
digital loopback  
A technique for testing the digital processing circuitry of a communications  
device; may be initiated locally or remotely via a telecommunications circuit.  
The device being tested returns a received test message, the results of which  
are compared to the original message.  
DS-0 (Digital Signal Level 0)  
A 64kbit/s standard digital telecommunications signal or channel.  
DS-1 (Digital Signal Level 1)  
The 1.544Mbit/s digital signal carried on a T1 facility.  
DS-3 (Digital Signal Level 3)  
The 44.736Mbit/s digital signal carried on a T3 facility.  
DSU/CSU (Data Service Unit/Channel Service Units)  
The pair of communications devices that connect an in-house line to an  
external digital circuit. At the customer's end of the telephone connection, the  
DSU/CSU takes data from terminals and computers, encodes it, and transmits  
it down the link. At the receive end, another DSU/CSU equalizes the received  
signal, filters it, and decodes it for interpretation by the end-user.  
DSU (Data Service Unit)  
A device designed to connect a DTE to a digital phone line. The DSU transmits  
and receives the signal and provides buffering and flow control. The DSU and  
CSU are often in the same unit. Also called a Digital Service Unit.  
DSR (Data Set Ready)  
A data port signal.  
Glossary  
G-5  
 
G
DSU Loopback  
A DSU loopback is intended to include as much of the customer data  
communications circuitry in the looped-back path as possible. The signal passes  
from the remote unit into the local unit as far as the DSU. This test loops the  
received network signal back to the network.  
DSU/CSU (Data Service Unit/Channel Service Units)  
The pair of communications devices that connect an in-house line to an  
external digital circuit. At the customer's end of the telephone connection, the  
DSU/CSU takes data from terminals and computers, encodes it, and transmits  
it down the link. At the receive end, another DSU/CSU equalizes the received  
signal, filters it, and decodes it for interpretation by the end-user.  
DSX-1 (Digital Signal Cross Connect Level 1)  
Parameters set used when DS-1 signals are cross connected.  
DTE (Data Terminal Equipment)  
Terminal equipment connected to the DSU and used for communication over  
digital networks. May be a terminal, computer, printer or multiplexer.  
DTE loopback  
An EIA-232-D signal which indicates that the DTE is ready for operation.  
DTR (Data Terminal Ready)  
Signal from DTE to DSU/CSU.  
E
EER (Excessive Error Rate)  
Determined by counting the number of T1/T3 code violations during a time  
interval.  
EFS (Error Free Seconds)  
Occurs when a second is free of CRC-6 violations or Out of Frame (OOF) events  
or one or more BPV or OOF events.  
EIA (Electronic Industries Association)  
An organization which sets data communication industry standards.  
encoding/decoding  
The process of reformatting information into a format suitable for  
transmission, and then recovering it after transmission.  
G-6  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
G
equalization  
The spacing and operation of amplifiers so that the gain provided by the  
amplifier, per transmission frequency, coincides with the signal loss at the same  
frequency; circuitry that compensates for the differences in attenuation at  
different frequencies.  
ES (Errored Second)  
Occurs when a second has one or more OOF events or CRC violations or with  
one or more BPV or OOF events.  
ESF (Extended Superframe Format)  
A new T1 framing standard used in Wide Area Networks (WANs). With this  
format 24 frames, instead of 12 are grouped together. ESF provides frame  
synchronization, cyclic redundancy checking and data link bits in overhead. It  
allows more information to be stored and retrieved easily, facilitating network  
performance monitoring and maintenance.  
F
failed signal state  
Occurs when ten consecutive severely errored seconds are detected.  
far end  
The unit or units remote from you.  
FE (Framing Errors)  
Occurs when the end of a frame is not detected where it should be.  
FDL (Facility Data Link)  
A four Kbps data channel provided by 12 of the 24 ESF framing bits. It is used  
by the carrier to request reports, clear error counters and activate loop backs.  
FG (Frame Ground)  
A signal from DTE to DSU/CSU.  
fractional bandwidth DTE loopback  
A loopback test that loops back the signal at the network interface. See also  
loopback.  
Fractional T1  
frame  
A service that provides less than full T1 capacity (one or more 64 Kbps  
channels are provided).  
A group of bits sent serially over a communications channel. The basic data  
transmission unit employed with bit oriented protocols.  
Glossary  
G-7  
 
G
frame relay  
A high-speed packet switching protocol used for wide area networks (WANs);  
faster than traditional X.25 networks, because it was designed for today's  
reliable circuits and performs less rigorous error detection. Frame relay networks  
use bandwidth only when there is traffic to send. Frame relay does not support  
voice.  
framing  
A technique which separates incoming bits into identifiable groups to enable  
the receiving device to recognize and reconstruct them.  
frame ground  
A metallic layer acting as a shield, consisting of tape, braid, wire or sheath and  
surrounding insulated conductors in cable. It may be the metallic sheath of the  
cable or the metallic layer inside a nonmetallic sheath. It reduces stray  
electrical fields, prevents outside electrical interference, drains off current  
induced by lightning and provides for safety of personnel.  
frequency  
The number of repetitions per unit time of a complete waveform. The number  
of complete cycles per unit of time, usually expressed in Hz.  
full bandwidth DTE loopback  
A loopback test that loops back the signal at the multiplexer. See also loopback.  
H
HDLC (High Level Data Link Control)  
Bit-oriented, data-link control protocol; any related control of data links by  
specified series of bits, rather than by control characters.  
I
IP address  
A unique, 32-bit identifier for a TCP/IP host on a network. IP addresses are  
normally printed in dotted decimal form, such as  
L
LBO (Line Build Out)  
An adjustable value used to tune the attenuation between the DSU/CSU card  
and the last repeater on the T1 circuit.  
LED (Light emitting diode)  
A device that accepts electrical signals and converts the energy to a light  
signal.  
G-8  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
G
LOF (Loss of Frame)  
Occurs when a received digital signal loses frame synchronization.  
LOFC (Loss of Frame Count)  
A count of declared Loss of Frame events (ESF framing only).  
loopback  
A diagnostic test in which the transmitted signal is returned to the sending  
device after passing through a data communications link or network. This  
allows a technician (or built-in diagnostic circuit) to compare the returned  
signal with the transmitted signal and get some sense of what's wrong.  
LOS (Loss of Signal)  
Occurs when an input signal is detected as all zeros for 176 bit times.  
loss  
A reduction in signal strength, expressed in decibels.  
LSC (Loopback Select Code)  
An indicator describing a DSU loopback characteristic. LSC is a minimum of 35  
LSC bytes of S11101F1 with secondary channel.  
LT (Local Test)  
A data port signal to DSU/CSU.  
M
mask  
Refer to subnet mask.  
MIB (Management Information Base)  
A structure that defines what is obtainable from a network device and what  
can be controlled. It has a directory listing the logical names of all information  
resources residing in the network and pertinent to the network's management.  
It is used to describe network management variables.  
multiplexer  
Any device that allows two or more users to share a common physical  
transmission medium. Employed in pairs, where each device performs both  
multiplexing of the multiple user inputs and demultiplexing of the channel  
back into the separate user data streams.  
multiplexing  
The combining of multiple data channels onto a single transmission medium.  
Typically, data streams are interleaved on a bit or byte basis (time division) or  
separated by different carrier frequencies (frequency division).  
Glossary  
G-9  
 
G
multidrop  
A communications arrangement where multiple devices share a common  
transmission channel, though only one may transmit at a time.  
N
NEBS  
A network Equipment Building Systems requirement. A standard issued by  
Bellcore that spells out central office standards for grounding, cabling and  
power.  
network  
An interconnection of computer systems, terminals, or data communications  
facilities.  
NI (Network Interface)  
The point of demarcation between the customer premises and the carrier's  
network, usually drawn at the network connector on the rear panel of the  
Quick Eagle Networks access device.  
NRZ (Non-Return to Zero)  
A binary encoding and transmission scheme where onesand zerosare  
represented by opposite, and alternating, high and low voltages.  
NRZI (Non-Return to Zero Inverted)  
A binary encoding technique that inverts the signal on a oneand leaves the  
signal unchanged for a zero,where a change in voltage state signals a one”  
bit and the absence of a change denotes a zerobit value.  
O
OOS (Out of Service)  
A digital network trouble signal.  
OOF (Out of Frame)  
An error checking scheme. An OOF occurs when two out of four consecutive  
framing bits are in error.  
P
parity bit  
An additional, non-informational bit appended to a group of bits indicating  
that the number of onesin the bits group is odd or even.  
parity check  
A process of error checking using the parity bit.  
G-10  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
G
polarity  
port  
Any condition where there are two opposing charges, such as positive and  
negative.  
The physical point of access into a computer, network or other electronic  
device.  
protocol  
R
A formal set of rules governing the format, timing, sequencing and error  
control of exchanged messages on a data network.  
RD (Receive Data)  
A data port signal.  
receiver  
The receiver synchronizes the framing pattern, separates the frame bits from  
the payload data and monitors for frame errors in 64 kbps mode. It achieves  
frame synchronization within 5 milliseconds.  
repeater  
Equipment that receives a pulse train, amplifies it, retimes it, and then  
reconstructs the signal for retransmission.  
return to zero  
Method of transmitting binary information such that, after each encode bit,  
voltage returns to the zero level.  
RI (Ring Indicator)  
A data port signal.  
RJ48S  
An 8-position keyed jack used to connect services that are covered under FCC  
Part 68 Rules, such as public switched digital service (PSDS), switched 56, 19.2  
Kbps service, 64 Kbps service, and synchronous digital data with secondary  
channel.  
RLSD  
RS232  
Receive Line Signal Detect, a data port signal  
A TIA/EIA standard for serial transmission.  
Glossary  
G-11  
 
G
RS232-C  
An EIA specified physical interface, with associated electrical signaling,  
between data circuit terminating equipment (DCE) and data terminating  
equipment (DTE).  
RS449  
A common 37-position interface for data terminal equipment and data circuit  
terminating equipment employing serial binary data interchange. It is a  
balanced interface, based on unipolar digital signals, depending more on  
current flow than voltage, therefore supports greater distances than the RS-232  
interface.  
RTS(Request to Send)  
A signal sent by DTE to DSU/CSU indicating DTE has data ready to transmit.  
S
SCR (Serial Clock Receive)  
A unipolar clock from the DCE signal. A data port signal.  
SCT (Serial Clock Transmit)  
A unipolar clock from the DCE signal. A data port signal.  
SCTE (Serial Clock Transmit External)  
The clock signal is echoed from the DTE for the purpose of timing incoming  
data on long cable runs.  
scrambler  
A device or software program that encodes data for encryption. It distorts a  
voice or data conversation so that only another like device can figure out the  
content of the message.  
SD (Send Data)  
A signal from DTE to DSU/CSU.  
secondary channel  
A subchannel derived from the main channel. It does not carry data messages  
and is used for diagnostic or supervisory purposes.  
serial transmission  
A sequential transmission of bits constituting an entity of data over a data  
circuit.  
SES (Severely Errored Second)  
A second during which 320 or more CRC violations or OOF events have  
occurred (ESF framing only).  
G-12  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
G
SG (Signal Ground)  
A signal from DTE to DSU/CSU.  
simplex current  
One way transmission used by Telco to provide power to repeaters.  
SLIP (Serial Line IP)  
A TCP/IP protocol that allows IP packets to be transmitted over a serial link,  
such as a dial-up or private telephone line.  
SMDS (Switched Multimegabit Data Service)  
A fast-packet technology based on the connection-less data networking  
capability described in the IEEE 802.6 specification. The data format for SMDS  
is cell oriented.SMDS does not support voice.  
SNMP (Simple Network Management Protocol)  
A widely-used network monitoring and control protocol. Data is passed from  
SNMP agents (hardware and/or software processes reporting activity in each  
network device, hub, router, bridge, etc.) to the workstation console used to  
oversee the network. The agents return information contained in a MIB  
(Management Information Base), which is a structure that defines what is  
obtainable from the device and what can be controlled.  
stop bit  
The last transmitted element in each character, which permits the receiver to  
come to an idle condition before accepting another character.  
subnet mask  
The number of bits in an IP address used for the subnet address.  
synchronous transmission  
Data communications in which characters or bits are sent at a fixed rate and the  
transmitting and receiving devices are synchronized.  
T
T1  
A digital carrier facility used to transmit a DS-1 formatted digital signal at  
1.544 Mbps. T-1 normally can handle 24 voice conversations, each one digitized  
at 64kbps. But, with more advanced digital voice encoding techniques, it can  
handle more voice channels. T-1 is a standard for digital transmission in North  
America. T-1 lines are used for connecting networks across remote distances.  
T3  
A digital carrier facility used to transmit a DS-3 formatted digital signal at  
44.736 Mbps.  
Glossary  
G-13  
 
G
T-Carrier  
A time-division, multiplexed digital transmission facility, usually operating at  
an aggregate data rate of 1.544 Mbps.  
telnet  
A remote terminal application that enables you to log on to a remote computer  
on the same IP network. You can work from the PC as if it were a terminal  
attached by a hard-wired line to the remote computer. The application uses the  
Telnet Internet protocol.  
transmitter  
TRAP  
In 64K mode, the transmitter inserts the frame bit, with a fixed pattern of  
101100.  
A mechanism by which a device automatically sends an alarm for certain  
network events to a management station. The management station can initiate  
a polling sequence to the device to determine the cause of the problem.  
U
UAS (Unavailable Seconds)  
Number of seconds elapsed after 10 consecutive SES events are received (ESF  
framing only).  
V
V.35  
A CCITT standard for the trunk interface between a network access device and  
a packet network. It defines signaling for data rates greater than 19.2 Kbps.  
V.52  
V.54  
Terminal emulation standard. CCITT standard (1976) for various loopback  
tests that can be incorporated into modems for testing the telephone circuit and  
isolating transmission problems. Operating modes include local and remote  
digital loopback and local and remote analog loopback.  
A CCITT standard for loop test devices in modems. It defines local and remote  
loopbacks.  
G-14  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 
Index  
I
I
E
A
Alarm Level 4-16  
Alarms and Status 4-5  
Application 2-3  
E1 NETWORK INTERFACE A-1  
E1 Port Mismatch Detection 2-5  
Enter Button 5-2  
Audience xvii  
AWG tray cable 3-3  
ENVIRONMENTAL A-3  
Equipment Return And Repair 6-1  
Event History 4-15  
Exit Button 5-2  
EXTERNAL ALARM CONTACTS A-4  
External Clock Connector Pin Assignments B-7  
EXTERNAL CLOCK INTERFACE A-1  
External Clock Pinouts B-7  
B
Button Overview 5-1  
C
cable  
installing DC power 3-4  
cable ties 3-4  
COMM and NMS Port Pin Assignments B-1  
COMM PORT A-2  
Configuration 4-17  
Configuration Menu 5-17  
CONFIGURATION MENU Items 5-18  
Conventions xviii  
F
Factory Default Settings C-1  
FRONT PANEL A-3  
Front Panel Interface, Chapter 5 5-1  
Front Panel LEDs 5-3  
Functional Description 2-4  
G
General 5-1  
General Menu Flow 4-2  
grounding  
D
DB-25 to DE-9 Adapter Pinouts B-6  
DB-25 to DE-9 Pinouts B-6, B-7  
DC power 3-3  
DC power 3-4  
DC Power Connections B-10  
defaults  
front panel message 3-4  
Delete RAM Code and Revert to ROM Code 4-36  
DIAGNOSTIC A-3  
Display Menu 5-7  
Display Overview 5-1  
Download Destination (Local Unit, Remove Unit,  
Both Units 4-33  
DTE CLOCK RATES B-10  
DTE Clock Rates B-10  
H
HSSI DTE Connector Pin Assignments B-1  
I
In-Band SNMP to Remote 4-42  
installation  
DC power 3-4  
Inverse Multiplexer Main Menu Commands 4-4  
L
DTE Configuration 4-20  
DTE Configuration Menu 5-24  
DTE Configuration Menu Options 4-23  
DTE CONNECTORS B-1  
DTE INTERFACE A-2  
Line Loopback 4-44, 5-16  
Local Loopback 4-44, 5-16  
LOCAL Loopback Test 6-2  
Log In/Log Off 4-1  
Login Configuration 4-37  
Logout 4-47  
DTE Settings C-1  
DTE Status 5-9  
DTE Tests 5-13  
M
DTE/NET Loopback 5-14  
DTE/Network Loopback 4-44  
DTE/Network Loopback Test 6-2  
Manual Network Restoration 4-46  
I-1  
 
I
S
N
Save Configuration 4-30, 4-42  
Screen Description 4-2  
Select Local/Remote 4-4  
Select Remote/Select Local 5-7  
Signal Flow 2-4  
NET (1-8) Statistics 5-9  
NET (1-8) Status 5-9  
NET N Config 5-28  
NET STATISTICS MENU Information Display 5-9  
NET Ststistics Items 4-13, 5-10  
NET THRESHOLD Options and Values 5-29  
Network Config 5-26  
SNMP Configuration 4-39  
SNMP Configuration Settings C-2  
Software Download 4-31  
Software Download Options 4-33  
Specifications, Appendix A A-1  
Statistics 4-11  
Network Configuration 4-25  
Network Configuration Menu 4-26  
Network Pin Assignments B-6  
Network Settings C-2  
Network Tests (1-8) 5-15  
Symbols xviii  
System Benefits 2-3  
Network Threshold Settings C-2  
Network Thresholds 4-28, 5-28  
NMS PORT (SNMP) A-2  
System Features 2-2  
System Overview 2-1  
System Utilities 4-30  
Node (Common Equipment) Status 5-8  
Node Configuration 5-19  
Node Configuration Options 4-18  
T
TC cable 3-4  
O
TERMINAL CONNECTION B-1  
Terminal Interface, Chapter 4 4-1  
Terminal Operation Overview 4-2  
Test Menu 5-11  
Organization xvii  
Overhead Function 2-6  
Test Settings C-3  
Tests 4-43  
TFTP Software Download 4-35  
Top Menu 5-5  
tray cable  
installing DC power 3-4  
Troubleshooting 6-4  
TROUBLESHOOTING THE DL3800E 6-3  
P
Payload Loopback 4-44, 5-15  
Payload Loopback and Line Loopback Tests 6-3  
PHYSICAL CONNECTORS A-4  
pin assignment  
communication port B-5  
DB-25 to DC-37 port B-4  
DC-37 to DB-25 DCE B-5  
pin assignments  
U
channel 1 data cable B-2  
Possible Sources of Problems 6-3  
POWER A-3  
Unit Configuration 4-17  
Unit Settings C-1  
power  
Up Arrow and Down Arrow Buttons 5-2  
-48 VDC (DC power) 3-4  
DC 3-3  
W
Warning! 3-4  
Warning!  
power 3-4  
power up 3-4  
Power Up And Reset 5-5  
Product Features 2-2  
X
X.21 to DB-25 Cable Pinouts B-7  
R
RAM Software Options 4-34  
RAM Software Options - Activate RAM Software 4-  
34  
RAM Software Options - Query RAM Software 4-  
34  
Restart Node Software 4-36  
RS-449, DB-25 to DB-25 DTE Connector Pin  
Assignments B-3  
Running Diagnostic Tests 6-1  
I-2  
DL3800E Inverse Multiplexer Users Guide July 9, 2001  
 

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