Quick Eagle Networks DL3800E User Manual

DL3800E

Inverse Multiplexer

User’s Guide

Part 098-30380-01 Rev F
July 9, 2001

COPYRIGHT AND TRADEMARKS

Copyright © 2001, Quick Eagle Networks

World copyright reserved. No part of this publication may be stored in a
retrieval system, transmitted, or reproduced in any way, including but not
limited to photocopy, photograph, magnetic, chemical, or other record,
without the prior agreement and written permission of Quick Eagle
Networks.

PRODUCT LIMITED WARRANTY

Quick Eagle Networks warrants to buyer that any unit shipped to buyer,
under normal and proper use, will be free of defects in material and
workmanship for a period of twenty-four (24) months from the date of
shipment to buyer. This limited warranty is void if there is any
unauthorized modification or repair of a unit by anyone other than Quick
Eagle Networks or its authorized agent.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL
OTHER WARRANTIES. EXCEPT AS OTHERWISE PROVIDED HEREIN,
QUICK EAGLE NETWORKS DISCLAIMS ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. Some jurisdictions may not allow the exclusion
of implied warranties, so some of the above exclusion may not apply to
you.

For further information about warranty and service on your Quick Eagle
Networks product, visit our Web site at www.quickeagle.com.

REMEDIES AND LIMITATIONS OF LIABILITY

All claims for breach of the foregoing warranty shall be deemed waived
unless notice of such claim is received by Quick Eagle Networks during the
applicable warranty period and unless the items claimed to be defective are
returned to Quick Eagle Networks within thirty

Failure of Quick Eagle Networks to receive written notice within the
specific period shall constitute a waiver by buyer of any such claim
irrespective of whether the facts giving rise to such a claim shall have then
been discovered or whether processing, further manufacturing, other use or
resale of such items shall have taken place.

ii DL3800E Inverse Multiplexer User’s Guide — July 9, 2001

(30) days after such claim.

DISCLAIMER

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.

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, non­exclusive 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

ISO 9001 Certified

An
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 you’re sure that the equipment is not malfunctioning.

WARN ING: 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 User’s Guide — July 9, 2001

Table of Contents

Preface xvii

Audience xvii

Organization xvii

Conventions xviii

Symbols xviii

Typography xix

Quick Eagle Networks Technical Support xx

Returning a Unit xx

Send Us Your Comments xxi

Document Change Record xxi

Chapter 1, Quick Install Guide 1-1

Purpose 1-1

Configuration 1-1

Equipment Needed 1-1

Setup 1-2

Terminal Log On 1-2

Terminal Configuration 1-2

Unit Configuration 1-2

DTE Configuration 1-2

Network Configuration 1-3

Save Configuration 1-3

Chapter 2, Introduction 2-1

System Overview 2-1

Product Features 2-2

System Features 2-2

System Benefits 2-3

vii

Application 2-3

Functional Description 2-4

Signal Flow 2-4

E1 Port Crossover Detection 2-5

Overhead Functions 2-6

Chapter 3, Installation 3-1

Installation 3-1

Mounting 3-2

Rack Mounting 3-2

Desk Operation And Stacking 3-2

Power Cables And Connections 3-3

AC Power Connection 3-3

DC Power Connection 3-3

E1 Network Connection 3-5

DTE Cable And Connection 3-5

ASCII Terminal and SNMP Connection 3-5

Direct Connection 3-6

Modem Connection 3-6

Telnet Connection 3-6

Daisy Chaining 3-7

Chapter 4, Terminal Interface 4-1

Log In/Log Off 4-1

Terminal Operation Overview 4-2

General Menu Flow 4-2

Screen Description 4-2

Inverse Multiplexer Main Menu Commands 4-4

Select Local/Remote 4-4

Alarms and Status 4-5

Statistics 4-11

Event History 4-15

viii DL3800E Inverse Multiplexer User’s Guide — July 9, 2001

Configuration 4-17

Unit Configuration 4-17

DTE Configuration 4-20

Network Configuration 4-25

Network Thresholds 4-28

Save Configuration 4-30

System Utilities 4-30

Software Download 4-31

Software Download Options 4-33

RAM Software Options 4-34

Delete Entire Unit Configuration (revert to factory config) 4-35

Login Configuration 4-37

SNMP Configuration 4-39

In-Band SNMP to Remote 4-42

Save Configuration 4-42

Tests 4-43

DTE/Network Loopback 4-44

Payload Loopback 4-44

Line Loopback 4-44

Local Loopback 4-44

Remote Loopback Detection 4-45

Manual Network Restoration 4-46

Logout 4-47

Chapter 5, Front Panel Interface 5-1

General 5-1

Display Overview 5-1

Button Overview 5-1

Exit Button 5-2

Up Arrow and Down Arrow Buttons 5-2

Enter Button 5-2

ix

Front Panel LEDs 5-3

Access Levels And Protected Mode 5-4

Power Up And Reset 5-5

Top Menu 5-5

Select Remote/Select Local 5-7

Display Menu 5-7

Node (Common Equipment) Status 5-8

DTE Status 5-9

NET (1-8) Status 5-9

NET (1-8) Statistics 5-9

Test Menu 5-12

DTE Tests 5-14

DTE/NET Loopback 5-14

Network Tests (1-8) 5-15

Payload Loopback 5-15

Line Loopback 5-16

Local Loopback 5-16

Configuration Menu 5-17

Node Configuration 5-19

DTE Configuration Menu 5-24

Network Config 5-26

NET N Config 5-28

Network Thresholds 5-28

Chapter 6, Diagnostics 6-1

Equipment Return And Repair 6-1

Running Diagnostic Tests 6-1

DTE/Network Loopback Test 6-2

LOCAL Loopback Test 6-2

Payload Loopback and Line Loopback Tests 6-3

Possible Sources of Problems 6-3

Troubleshooting the DL3800E 6-3

x DL3800E Inverse Multiplexer User’s Guide — July 9, 2001

Appendix A, Specifications A-1

E1 Network Interface A-1

External Clock Interface A-1

DTE Interface A-2

COMM PORT A-2

NMS Port (SNMP) A-2

Front Panel A-3

Diagnostics A-3

Power A-3

Environmental A-3

Physical /Connectors A-4

External Alarm Contacts A-4

Appendix B, Pinouts B-1

Terminal Connection B-1

DCE Connectors B-1

Channel 1 Data Cable Pin Assignments B-2

DB-25 to DC-37 Data Port Cable Pin Assignments B-4

Communication Port Pin Assignments B-5

RS-449, DC-37 to DB-25 DCE Cable Pin Assignments B-5

E1 Network Pin Assignments B-6

DB-25 to DE-9 Adapter Pinouts B-6

X.21 to DB-25 Cable Pinouts B-7

External Clock Connector Pin Assignments B-7

Alarm Pinout B-9

DC Power Connections B-10

DTE Clock Rates B-10

Appendix C, Factory Default Settings C-1

Glossary G-1

xi

Index I-1

xii DL3800E Inverse Multiplexer User’s Guide — July 9, 2001

List of Figures

Figure 1-1 DL3800E Inverse Multiplexer (front panel) 1-1

Figure 2-1 DL3800E Inverse Multiplexer 2-1

Figure 2-2 Typical Application for DL3800E 2-3

Figure 2-3 DL3800E Functional Schematic 2-6

Figure 3-1 DL3800E Rear Panel 3-2

Figure 4-1 INVERSE MULTIPLEXER MAIN MENU 4-3

Figure 4-2 ALARMS AND STATUS MENU 4-5

Figure 4-3 STATISTICS MENU 4-11

Figure 4-4 NET STATISTICS MENU 4-12

Figure 4-5 Additional NET STATISTICS 4-13

Figure 4-6 EVENT HISTORY MENU 4-16

Figure 4-7 CONFIGURATION MENU 4-17

Figure 4-8 UNIT CONFIGURATION MENU 4-18

Figure 4-9 DTE CONFIGURATION MENU (V.35) 4-21

Figure 4-10 DTE CONFIGURATION MENU (RS449) 4-21

Figure 4-11 DTE CONFIGURATION MENU (X.21) 4-22

xiii

Figure 4-12 DTE CONFIGURATION MENU (HSSI) 4-22

Figure 4-13 Network Configuration Screen 4-26

Figure 4-14 Network Thresholds Configuration 4-29

Figure 4-15 SYSTEM UTILITIES MENU 4-30

Figure 4-16 SOFTWARE DOWNLOAD MENU 4-31

Figure 4-17 SOFTWARE UTILITIES MENU 4-36

Figure 4-18 LOGIN CONFIGURATION MENU 4-37

Figure 4-19 SNMP CONFIGURATION MENU 4-39

Figure 4-20 TESTS MENU 4-43

Figure 4-21 Loopbacks within the DL3800E unit 4-45

Figure 4-22 MANUAL NETWORK RESTORATION MENU 4-47

Figure 5-1 DL3800E Front Panel 5-1

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

Table 4-2 3800E Alarm Descriptions 4-5

Table 4-3 NET Statistics Items 4-13

Table 4-4 Alarm Level 4-16

Table 4-5 Node Configuration Options 4-18

Table 4-6 DTE Configuration Menu Options 4-23

Table 4-7 Network Configuration Menu Options 4-26

Table 4-8 Login Configuration Options 4-38

Table 4-9 SNMP Configuration Options 4-40

Table 5-1 Front Panel LEDs 5-3

Table 5-2 Net Statistics Menu Information Display 5-9

Table 5-3 Net Statistics Items 5-10

Table 5-4 Configuration Menu Items 5-18

Table 5-5 Node Configuration Menu Items 5-21

Table 5-6 Net Threshold Options and Values 5-29

Table 6-1 Troubleshooting 6-4

xv

Table B-1 COMM and NMS Port Pin Assignments B-1

Table B-2 HSSI DCE Connector Pin Assignments B-1

Table B-3 V.35, M-34 to DB-25 DTE Cable Pin Assignments B-2

Table B-4 EIA-530, DB-25 to DB-25 DCE Conn. Pin Assignmts B-3

Table B-5 DB-25 to DC-37 Data Port Cable Pin Assignments B-4

Table B-6 RS-449, DC-37 to DB-25 DCE Cable Pin Assignments B-5

Table B-7 Network Pin Assignments B-6

Table B-8 DB-25 to DE-9 Pinouts B-6

Table B-9 DB-25 to DB-15 Pinouts B-7

Table B-10 External Clock Pinouts B-7

Table B-11 Alarm Pinout B-9

Table B-12 DTE Clock Rates B-10

Table C-1 Unit Settings C-1

Table C-2 DTE Settings C-1

Table C-3 Network Settings C-2

Table C-4 Network Threshold Settings C-2

Table C-5 SNMP Configuration Settings C-2

Table C-6 Test Settings C-3

xvi DL3800E Inverse Multiplexer User’s Guide —July 9, 2001

The DL3800E Inverse Multiplexer User ’s 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.

Preface

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.

WARN ING: 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 User’s Guide — July 9, 2001

Typography

Typeface or
Symbol

Quick Eagle Networks manuals delineate the names of files, commands,
and actions by using the fonts and typefaces described in the following
table:

Purpose Example

Courier
Font
AaBbCc123

Courier
Font, Bold
AaBbCc123

Palatino Font,
Italic
AaBbCc123

▼

Zapf Dingbats
Font

Palatino Font,
Bold Blue,
Underscore
AaBbCc123

The names of commands, files, and
directories, as well as on-screen
computer output.

The input you provide, as contrasted
with on-screen computer output.

Keystrokes that you must provide to
use the application.

Command-line placeholder that you
replace with a real name or value.

Book titles, new words or terms, or
words that need to be emphasized.

Symbol that denotes a single-step
procedure or task. Procedures
requiring more than one task are
numbered.

Hyperlinks in the table of
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.

Edit your.login file.

Use ls -a to list all files.

machine_name% You have
mail.

machine_name% su

Press Ctrl-L to refresh the screen.

To delete a file, type rm filename

Refer to Chapter 6.

These are called class options.

You must be logged in as root to
access this directory.

Palatino Font,
Blue
AaBbCc123
or
AaBbCc123

Helvetica Bold Denotes actual markings on front or

Hyperlinks throughout general text.

back panels.

Preface xix

Attach the cable to the TERMINAL
port

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 [phone]

FAX [phone]

E-mail [e-mail]

Internet www.quickeagle.com

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 [phone], or via e-mail at [e-mail], or fax a
request to [phone] 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 User’s 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 [phone]

E-mail [e-mail]

All suggestions and comments are appreciated.

DOCUMENT CHANGE RECORD

Date Issue Rev. Description Pages Affected

May 1996 A Initial Release All

January 1999 B Update & Misc.

Changes

January 2000 C Update & Misc.

Changes

September 2000 D Update & Misc.

Changes

October 2000 E Update & Misc.

Changes

June 2001 F Update & Misc.

Changes

Preface xxi

All

All

All

All

All

xxii DL3800E Inverse Multiplexer User’s Guide — July 9, 2001

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

Quick Install Guide 1

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-x five 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 Return or Enter. When
prompted for user name and password press Return twice, 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 CONFIRM and 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 EXIT to go back to the CONFIGURATION MENU.

DTE Configuration

WARN ING: 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.21 or HSSI. For
V.35/RS449/X.21 configuration, set the clock to SCTE and Normal TD/RD

clock. Set the DTE loss condition for NONE. Select Confirm, then select
EXIT to go back to the CONFIGURATION MENU.

1-2 DL3800E Inverse Multiplexer User’s Guide — July 9, 2001

Network Configuration

Set up a port for each E1 line you plan to use. Set Alarm to Report. Set
ACTICVE/RESTORE MODE to 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.

You’re done! If you have any questions, please feel free to call Quick Eagle
Network’s Technical Support at [phone].

1

Quick Install Guide 1-3

1

1-4 DL3800E Inverse Multiplexer User’s Guide — July 9, 2001

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-to­LAN internetworking, bulk data transfer, video teleconferencing, and
disaster recovery.

Figure 2-1 DL3800E Inverse Multiplexer

Introduction 2

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

2-2 DL3800E Inverse Multiplexer User’s Guide — July 9, 2001

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.

2

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.

2-4 DL3800E Inverse Multiplexer User’s Guide — July 9, 2001