General DataComm DeskTop T1 Owner's manual

Data Service Unit
DeskTop T1
GDC 048R154-000-01
Issue 1 - October 1997
Installation and Operation
General DataComm

Table of Contents
GDC 048R154-000
Preface
1 Technical Overview
Overview............................................................................1-1
DT T1 DSU Features.........................................................1-1
Description.........................................................................1-2
Fractional T1 Capabilities..................................................1-2
DTE Interface.....................................................................1-3
2 Installation
Overview............................................................................2-1
Unpacking and Handling ...................................................2-1
Preoperational Check.........................................................2-1
Option Selection.................................................................2-2
Timing Options............................................................2-2
Connections......................................................................2-13
DTE Interface Port Connection.................................2-13
Network Connection..................................................2-13
Primary Power Connection........................................2-15
Terminal Connection.................................................2-15
3 Operation
Overview............................................................................3-1
Controls and Indicators ......................................................3-1
Terminal Interface..............................................................3-3
Configuration...............................................................3-3
Diagnostics ..................................................................3-8

ii Table of Contents
GDC 048R154-000
Monitor ......................................................................3-10
What Are You?..........................................................3-12
4 Tests
Overview............................................................................4-1
Terminal Interface Test Procedure.....................................4-4
Network QRSS Self Test ...................................................4-8
Network Payload Loopback.............................................4-10
Network Line Loopback ..................................................4-11
Network Local Test..........................................................4-13
Network Local Test with QRSS Self Test.......................4-13
Network Remote Test ......................................................4-14
Network Remote Test with QRSS Self Test....................4-16
DTE Self Test...................................................................4-17
DTE Local Loopback.......................................................4-19
DTE Digital Loopback.....................................................4-21
DTE Remote Digital Loopback .......................................4-21
DTE Remote Digital Loopback with Self Test................4-23
A Technical Characteristics
B DTE Interface Signals
C Timing Options
D Alarm Definitions

Table of Contents iii
GDC 048R154-000
Figures
2-1 Position of Configuration Option Switchbanks..........2-3
2-2 Back Panel Connectors...............................................2-13
2-3 EIA-530 Interface Daughter Card Installation............2-14
3-1 DT T1 Front Panel Controls and Indicators................3-2
3-2 Configuration Screen, with Default Settings..............3-4
3-3 Diagnostics Selection Screen......................................3-9
3-4 Diagnostics Results Screen.........................................3-10
3-5 Monitor Screen ...........................................................3-11
3-6 What Are You? Screen ...............................................3-12
4-1 Fault Isolation Procedure............................................4-3
4-2 Diagnostics Selection Screen......................................4-4
4-3 Diagnostics Results Screen.........................................4-7
4-4 Data Path for Network End-to-End Self Test .............4-9
4-5 Network End-to-End Self Test, Front Panel Control..4-9
4-6 Data Path for Network Payload Loopback .................4-11
4-7 Data Path for Network Line Loopback.......................4-12
4-8 Network Line Loopback, Front Panel Control ...........4-12
4-9 Data Path for Network Local Test..............................4-13
4-10 Network Local Test, Front Panel Control...................4-14
4-11 Data Path for Network Remote Test...........................4-15
4-12 Network Remote Test, Front Panel Control ...............4-15
4-13 Data Path for Network Remote Test with Self Test ...4-16
4-14 Network Remote Test with Self Test,
Front Panel Control.....................................................4-17
4-15 Data Path for DTE End-to-End Self Test ...................4-18
4-16 DTE End-to-End Self Test, Front Panel Control........4-19
4-17 Data Path for DTE Local Loopback...........................4-20
4-18 DTE Local Loopback, Front Panel Control................4-20

iv Table of Contents
GDC 048R154-000
4-19 Data Path for DTE Digital Loopback.........................4-21
4-20 Data Path for DTE Remote Digital Loopback............4-22
4-21 DTE Remote Digital Loopback,
Front Panel Control.....................................................4-22
4-20 Data Path for DTE Remote Digital Loopback
with Self Test ..............................................................4-23
4-21 DTE Remote Digital Loopback with Self Test,
Front Panel Control.....................................................4-24
Tables
1-1 Equipment List............................................................1-4
2-1 Option Application Notes – Switchbank S13,
CSU Characteristics....................................................2-4
2-2 Option Application Notes – Switchbank S14,
Network Characteristics..............................................2-6
2-3 Option Application Notes – Switchbank S15,
DTE Characteristics....................................................2-8
2-4 Option Application Notes – Switchbank S10,
DTE Characteristics....................................................2-9
2-5 Option Application Notes – Switchbanks S11 & S12,
DS0 Assignments........................................................2-10
2-6 DTE Data Rate Selection – Switchbank S12..............2-11
2-7 DTE Starting DS0 Selections – Switchbank S11 .......2-12
3-1 DT T1 Configuration Option Settings........................3-5

Preface
GDC 048R154-000
Scope
This manual describes how to install and configure a General
DataComm Desktop T1 Data Service Unit. It is written for installers,
servicetechnicians,andusers.Itassumesa workingknowledgeofdata
interfaces, and T1 and Fractional T1 data transmission services.
Revision History
This is the initial issue of the manual.
Organization
Thismanual has four chaptersandfour appendices. Theinformationis
arranged as follows:
•Chapter 1 - Technical Overview describes the Data Service Unit,
its features, and its options. This chapter contains the Equipment
List table.
•Chapter2 -Installation providesdirectionsfor installingtheDSU
and configuring it by means of the switchbanks located on the pc
board.
•Chapter 3 - Operation describes the use of both the DSU front
panel controlsandindicators,andthe VT100-compatibleterminal
interface that can be accessed through the Console port.
•Chapter 4 - Tests describes tests that can be performed on the
DSU.
•Appendix A - Technical Characteristics
•Appendix B - DTE Interface Signals lists pin/signal assignments
for thetwo DTE interfaces that theDSUcansupport: ITU-T V.35
and EIA-530.
•AppendixC - Timing Options illustratesthearrangementsthat can

vi Preface
GDC 048R154-000
be used to provide transmit timing for the DSU.
•Appendix D - Alarm Definitions identifies the conditions that can
cause the DSU to generate an alarm.
Document Conventions
Level 1 paragraph headers introduce major topics.
Level 2 paragraph headers introduce subsections of major
topics.
Level 3 paragraph headers introduce subsections of sec-
ondary topics.
This typewriter font shows output that
is displayed on the screen.
This bold font shows specific input that
you type at the keyboard.
This bold italicized font shows variable
input that you type at the keyboard.
Service and Support
General DataCommiscommitted toproviding theservice and support
needed to install, manage, and maintain your equipment. For
informationaboutserviceprogramsorforassistancewithyoursupport
requirements, contact your local Sales Representative or call General
DataComm Service at the 24-hour, toll-free number listed below.
• in the U.S. dial 1-800-243-1030
• outside the U.S. dial 1-203-598-7526
Notes present special instructions, helpful hints or
general rules.
NOTE

Preface vii
GDC 048R154-000
Be ready with the site name and phone number, and a description of
the problem. The next available support representative will promptly
return your call.
Hands-ontraining courses areprovidedbyGDCEducationalServices.
Courses range from basic data communications, modems and
multiplexers,to complex networkand ATMsystems and aretaught in
Connecticutor at a customer location.To discusseducationalservices
orreceivea course schedule,call1-800-243-1030andfollowthemenu
instructions.
Safety Instructions
Antistatic Precautions
Electrostatic discharge (ESD) results from the buildup of static
electricity and can cause computer components to fail. Electrostatic
discharge occurs when a person whose body contains a static buildup
touches a computer component.
The equipment may contain static-sensitive devices that are easily
damaged, so proper handling and grounding are essential. Use ESD
precautionary measures when installing parts or cards, and keep the
parts and cardsin antistaticpackagingwhen notinuse. Ifpossible, use
antistatic floor pads and workbench pads.
When handling components or setting switch options always use an
antistatic wrist strap connected to a grounded equipment frame or
chassis. If a wrist strap is not available, periodically touch an
unpainted metal surface on the equipment. Never use a conductive
tool, such as a screwdriver or a paper clip, to set switches.
Safety Guidelines
The following symbols are used in this manual to draw your attention
to potential hazards. A Caution indicates a hazard to equipment or
data. A Warning indicates a hazard to personnel.

viii Preface
GDC 048R154-000
Always use cautionandcommon sense. Toreducetherisk of electrical
shock,do not operate any equipment with the cover removed.Repairs
must be performed by qualified service personnel only.
Regulatory Notices
FCC Part 68 Compliance
Connectionofdatacommunicationsequipmenttothe public telephone
network is regulated by FCC Rules and Regulations. This equipment
complies with Part 68 of these regulations which require all of the
following:
Allconnectionstothetelephonenetworkmustbemadeusingstandard
plugs and telephone company provided jacks or equivalent.
Connection of this equipment to party lines and coin telephones is
prohibited.A label on thebottom of the DT T1 enclosure providesthe
FCC Registration number for the unit. If requested, give this
information to the telephone company.
To connect the DeskTop T1 DSU to the Public Telephone Network
you are required to give the following information to the Telephone
Company:
FCC Registration Number: AG6USA-24144-DE-N
FIC (Facility Interface Code):04DU9-DN,04DU9-BN,04DU9-1KN,
04DU9-1SN
Caution statements identify conditions or practices that
can result in damage to the equipment or in loss of data.
Warning statements identify conditions or practices that
can result in personal injury or loss of life.