Paradyne HotWire 7924 User manual

HOTWIRE
MODEL 7924 STANDALONE
T1 HDSL TERMINATION UNIT
USER’S GUIDE
Document No. 7924-A2-GB20-30
October 1997

Printed on recycled paper
A 7924-A2-GB20-30
October 1997
Copyright 1997 Paradyne Corporation.
All rights reserved.
Printed in U.S.A.
Notice
This publication is protected by federal copyright law. No part of this publication may be copied or distributed,
transmitted, transcribed, stored in a retrieval system, or translated into any human or computer language in any form
or by any means, electronic, mechanical, magnetic, manual or otherwise, or disclosed to third parties without the
express written permission of Paradyne Corporation, 8545 126th Avenue North, P.O. Box 2826, Largo,
Florida 33779-2826.
Paradyne Corporation makes no representation or warranties with respect to the contents hereof and specifically
disclaims any implied warranties of merchantability or fitness for a particular purpose. Further, Paradyne Corporation
reserves the right to revise this publication and to make changes from time to time in the contents hereof without
obligation of Paradyne Corporation to notify any person of such revision or changes.
Changes and enhancements to the product and to the information herein will be documented and issued as a new
release to this manual.
Trademarks
All products and services mentioned herein are the trademarks, service marks, registered trademarks or registered
service marks of their respective owners.
Warranty, Sales, and Service Information
Contact your sales or service representative directly for any help needed. For additional information concerning
warranty, service, repair, spare parts, installation, documentation, or training, use one of the following methods:
Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.com
Via Telephone: Call our automated call system to receive current information via fax or to speak with a
company representative.
— Within the U.S.A., call 1-800-870-2221
— International, call 727-530-2340

Important Information
B
7924-A2-GB20-30 October 1997
Important Safety Instructions
1. Read and follow all warning notices and instructions marked on the product or included in the manual.
2. Do not allow anything to rest on the power cord and do not locate the product where persons will walk on the
power cord.
3. Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous
high voltage points or other risks. Refer all servicing to qualified service personnel.
4. General purpose cables are provided with this product. Special cables, which may be required by the regulatory
inspection authority for the installation site, are the responsibility of the customer.
5. When installed in the final configuration, the product must comply with the applicable Safety Standards and
regulatory requirements of the country in which it is installed. If necessary, consult with the appropriate regulatory
agencies and inspection authorities to ensure compliance.
6. A rare phenomenon can create a voltage potential between the earth grounds of two or more buildings. If
products installed in separate buildings are interconnected, the voltage potential may cause a hazardous
condition. Consult a qualified electrical consultant to determine whether or not this phenomenon exists and, if
necessary, implement corrective action prior to interconnecting the products.
7. In addition, if the equipment is to be used with telecommunications circuits, take the following precautions:
—Never install telephone wiring during a lightning storm.
—Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.
—Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the
network interface.
—Use caution when installing or modifying telephone lines.
—Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of
electric shock from lightning.
—Do not use the telephone to report a gas leak in the vicinity of the leak.

Important Information
C 7924-A2-GB20-30
October 1997
EMI Warnings
!WARNING:
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.
The authority to operate this equipment is conditioned by the requirements that no modifications will be
made to the equipment unless the changes or modifications are expressly approved by Paradyne
Corporation.
!WARNING:
To Users of Digital Apparatus in Canada:
This Class A digital apparatus 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 matérial
brouilleur du Canada.

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7924-A2-GB20-30 October 1997
Contents
About This Guide
Document Purpose and Intended Audience v. . . . . . . . . . . . . . . . . . . . . . . . .
Document Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product-Related Documents vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1About HotWire Model 7924 Termination Units
HotWire 7924-A1 Models and Features 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Configurations 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
User Interface Types 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2Installing the Unit
Overview 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Checklist for HotWire Model 7924-A1 2-1. . . . . . . . . . . . . . . . . . . . . .
Connecting to the Network 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Power to the Unit 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3Using Terminal and Switchpack Modes
Choosing an Interface Mode 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting to a System Terminal 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switching Between Terminal and Switchpack Modes 3-2. . . . . . . . . . . . . . . . .
4Customizing DSX-1-Compatible Units
Accessing Configuration Options 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Making Changes from the Terminal Interface 4-2. . . . . . . . . . . . . . . . . . . . . . .
Making Changes in Switchpack Mode 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying Switchpack Definitions 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying Line Build-Out Definitions 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
ii 7924-A2-GB20-30
October 1997
5Customizing V.35-Compatible Units
Accessing Configuration Options 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Making Changes from the Terminal Interface 5-2. . . . . . . . . . . . . . . . . . . . . . .
Making Changes in Switchpack Mode 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying Switchpack Definitions 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6Monitoring the Unit
What to Monitor 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Board Status 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Statistics 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Unit Information 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel LEDs 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DSX-1-Compatible Unit 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V.35-Compatible Unit 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7Testing
Detecting a Problem 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Understanding Loopback Tests 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Local Loopbacks 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Loopbacks 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting and Stopping Loopbacks 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resetting the Unit 7-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AWorksheets
Overview A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DSX-1-to-DSX-1 Configuration A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DSX-1-to-V.35 Configuration A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unframed Operation A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time Slot (DS0) Assignments A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DSX-1-Compatible Units Configuration Worksheet A-5. . . . . . . . . . . . . . . . . .
V.35-Compatible Units Configuration Worksheet A-5. . . . . . . . . . . . . . . . . . . .

Contents
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7924-A2-GB20-30 October 1997
BCable Pin Assignments
Terminal Connection Cable Pin Assignments B-1. . . . . . . . . . . . . . . . . . . . . . .
HDSL Loop Connection Cable Pin Assignments B-2. . . . . . . . . . . . . . . . . . . . .
T1 Network Connection Cable Pin Assignments B-3. . . . . . . . . . . . . . . . . . . . .
V.35 Connection Cable Pin Assignments B-4. . . . . . . . . . . . . . . . . . . . . . . . . . .
CSwitchpacks and Jumpers
DSX-1-Compatible Units C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V.35-Compatible Units C-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary
Index

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7924-A2-GB20-30 October 1997
About This Guide
Document Purpose and Intended Audience
This guide contains information needed to set up, configure, and operate HotWire
Model 7924-A1 T1 HDSL termination units. It is designed for central office
technicians or network engineers who have an understanding of the deployment
of digital subscriber line systems in a telephone company or private network
environment.
HotWire 7924 may be ordered either as a standalone unit (7924-A1-xxx) or as a
nest-mounted card (7924-B1-xxx) that fits in a HotWire 7900 nest. This guide
describes the installation and maintenance procedures for the standalone
version, Model 7924-A1-xxx.
Document Summary
Section Description
Chapter 1 About HotWire Model 7924 Termination Units . Describes the
features of each version of the Model 7924, and typical
configurations.
Chapter 2
Installing the Unit . Describes how to install the unit and
make connections.
Chapter 3
Using Terminal and Switchpack Modes. Provides
instructions for connecting a VT100-compatible terminal
user interface. Also describes how to make manual
configuration changes directly on the board hardware.
Chapter 4
Customizing DSX-1-Compatible Units . Provides instructions
for modifying configuration options by using the terminal
interface or DIP switches and jumpers on the board.
Chapter 5
Customizing V.35-Compatible Units . Provides instructions
for modifying configuration options by using the terminal
interface or DIP switches and jumpers on the board.

About This Guide
vi 7924-A2-GB20-30
October 1997
Section Description
Chapter 6 Monitoring the Unit. Describes how to monitor unit status,
LEDs, and network statistics. Also describes how to monitor
the status of the unit on the opposite side of the HDSL
connection.
Chapter 7
Testing . Provides information about available loopback
tests.
Appendix A
Worksheets. Contains all the configuration options, default
settings, and possible settings to use for planning.
Appendix B
Cable Pin Assignments. Contains connector and interface
details.
Appendix C
Switchpacks and Jumpers. Defines the switchpack and
jumper positions on the board hardware. Includes board
layout diagrams.
Glossary Defines acronyms and terms used in this document.
Index Lists key terms, acronyms, concepts, and sections in
alphabetical order.
Product-Related Documents
Document Number Document Title
7900-A2-GB20 HotWire Model 7900 Basic Maintenance Processor
User’s Guide
7900-A2-GB21 HotWire Model 7900 SNMP Maintenance Processor
User’s Guide
7900-A2-GN10 HotWire Model 7900 10-Slot Standalone Shelf
Installation Instructions
7900-A2-GN20 HotWire Model 7900 Nest and Options Installation
Guide
7920-A2-GB20 HotWire Models 7924 and 7925 T1 and E1 HDSL
Nest Card Termination Units User’s Guide
7925-A2-GB20 HotWire Model 7925 Standalone E1 HDSL
Termination Unit User’s Guide
To order additional product documentation, refer to Warranty, Sales, and Service
Information
on page A at the beginning of this User’s Guide.

1-1
7924-A2-GB20-30 October 1997
About HotWire Model 7924
Termination Units 1
HotWire 7924-A1 Models and Features
Products in the HotWire 7924 family provide “last mile/last kilometer” transport of
T1-compatible circuits between customer facilities and central site equipment
over 2- or 4-wire copper lines. The units can be used over distances substantially
exceeding traditional T1 spans and Canadian Standards Association (CSA) loop
standards.
HotWire 7924 standard features include:
V.35 or DSX-1 interface
Full support for T1 using two twisted-copper pairs
Full support for fractional T1 using one or two twisted-copper pairs
Automatic detection and compensation for inverted pairs and swapped loops,
which simplifies installation
Tolerance of bridged taps
Local and remote alarm surveillance
Local and remote T1 network and HDSL loop performance monitoring
HotWire 7924 may be ordered either as a standalone unit (7924-A1-xxx) or as a
nest-mounted card (7924-B1-xxx) that fits in a HotWire 7900 nest. This guide
describes the installation and maintenance procedures for the standalone
version, Model 7924-A1-xxx.
Up to ten standalone units may be installed in an optional HotWire 7900 10-Slot
Standalone Shelf. This is a convenient way to stack standalone units, using a
single power source.
To order additional product documentation, refer to
Warranty, Sales, and Service
Information
on page A at the beginning of this User’s Guide.

About HotWire Model 7924 Termination Units
1-2 7924-A2-GB20-30
October 1997
There are several versions of the Model 7924-A1, each supporting a different
interface (DSX-1 or V.35) and power supply (120 Vac, 230 Vac, or –48 Vdc):
Model Number Features
7924-A1-201 1.544 Mb/s DSX-1 compatible.
Connection to 120 Vac power supply.
7924-A1-202 1.544 Mb/s V.35 compatible.
Connection to 120 Vac power supply.
7924-A1-301 1.544 Mb/s DSX-1 compatible.
Connection to 230 Vac power supply.
7924-A1-302 1.544 Mb/s V.35 compatible.
Connection to 230 Vac power supply.
7924-A1-501 1.544 Mb/s DSX-1 compatible.
Direct connection to –48 Vdc power supply.
For use in a HotWire 7900 10-Slot Standalone Shelf only.
7924-A1-502 1.544 Mb/s V.35 compatible.
Direct connection to –48 Vdc power supply.
For use in a HotWire 7900 10-Slot Standalone Shelf only.

About HotWire Model 7924 Termination Units
1-3
7924-A2-GB20-30 October 1997
Typical Configurations
HotWire Model 7924 standalone units can be used in campus applications where
long loop distances normally require the campus to contract with the local
telephone exchange carrier to deliver private line services across the campus.
Figure 1-1 shows two typical campus applications where remote PBXs or
multiplexers are interconnected across a campus using two HotWire Model 7924
standalone units. In each pair, one unit is configured as a central site or central
office (CO) unit and the other is the remote or customer premises (CP) unit.
The HotWire Model 7924 standalone unit is configured at the factory to operate at
the CP side of a T1 HDSL connection. (Conversely, HotWire Model 7924 nest
cards are configured for CO operation.) The central site unit must be reconfigured
for CO operation in these configurations.
Customer Premises Central Site
Cross-campus
2- or 4-wire
facility
PBX
DSX-1 Unit
DSX-1
PBX
DSX-1 Unit
DSX-1
97-15295
Multiplexer
DSX-1 Unit
DSX-1
Multiplexer
DSX-1 Unit
DSX-1
Cross-campus
2- or 4-wire
facility
Customer Premises Central Site
97-15296
Figure 1-1. Campus Network Applications

About HotWire Model 7924 Termination Units
1-4 7924-A2-GB20-30
October 1997
HotWire Model 7924 standalone units are also ideal for delivering T1 services
from a central site to the customer premises over long loop distances without
repeaters.
Figure 1-2 shows a central-site application with a HotWire 7900 Nest containing
HotWire Model 7924 nest cards. The nest cards at the central site each terminate
a single HDSL subscriber line. Each line is then converted to a DSX-1 interface
for connection to other central office equipment, such as a digital cross-connect
system (DCS).
PBX
DSX-1 Unit
Router
DSX-1
DCS
Mgmt
Station
7900 Nest
Nest
Cards
V.35 Unit
V.35
Multiplexer
DSX-1 Unit
DSX-1
Telco 2- or 4-wire
facilities to
customer premises
Customer Premises
Central Site
97-15294
Figure 1-2. T1 Extension to Customer Premises

About HotWire Model 7924 Termination Units
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7924-A2-GB20-30 October 1997
Cellular network providers must lease large numbers of T1 circuits in order to
connect remote cell sites to mobile telephone switching offices (MTSOs).
HotWire Model 7924 products provide an alternative to standard repeatered T1
services. Figure 1-3 depicts a typical cellular network access application.
Switch
Mgmt
Station
7900 Nest
Nest
Cards
Telco 2- or 4-wire
facilities
between Cell Sites
and MTSO
Customer Premises
Central Site
DSX-1
DSX-1 Unit
DSX-1
DSX-1 Unit
DSX-1
Cell Site
Cell Site
Mobile Telephone
Switching Office (MTSO)
97-15297
Figure 1-3. Cellular Network Access
User Interface Types
There are three types of user interfaces to the standalone units:
VT100-compatible terminal interface (see Chapter 3)
Manual setting of switches and jumpers (see Chapter 3)
Front Panel LED status indicators (see Chapter 6)

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7924-A2-GB20-30 October 1997
Installing the Unit 2
Overview
This chapter describes the procedure for installing a single standalone
termination unit using a 120 Vac or 230 Vac power supply (Model 7924-A1-20x or
7924-A1-30x).
If you have multiple standalone units at the same location, you may want to
consider installing the units in a HotWire Model 7900 10-Slot Standalone Shelf.
The Standalone Shelf is a convenient method for housing up to ten standalone
termination units and uses only a single power source.
HotWire Model 7924-A1-50x units (which use –48 Vdc direct power) must be
installed in a HotWire 7900 10-Slot Standalone Shelf. Installation instructions for
these models are not provided in this User’s Guide.
To obtain information on the Standalone Shelf, refer to
Product-Related
Documents
on page vi.
Package Checklist for HotWire Model 7924-A1
Verify that your package contains the following:
HotWire Model 7924-A1 unit
VT100 Terminal Cable
14′twisted-pair network cable
Power cord with power transformer (optional)
Warranty card

Installing the Unit
2-2 7924-A2-GB20-30
October 1997
Connecting to the Network
Procedure
1. Connect one end of the supplied 14′twisted-pair network cable into the rear
panel HDSL jack. Connect the other end to your HDSL network interface.
NOTE:
Do not use a flat VF network cable, as this may severely degrade the
performance of the termination unit. Use only a twisted-pair network
cable.
2. Connect a V.35 or DSX-1 interface cable into the appropriate connector on
the rear panel. Connect the other end to your V.35 or DSX-1 equipment.
HotWire 7924 V.35-compatible units are not designed to be used at both ends of
an HDSL connection.
Connecting Power to the Unit
HDSL DS1
48 VDC
97-15356-01
DSX-1-Compatible HotWire 7924 – Rear Panel
HDSL V.35
48 VDC
97-15264
V.35-Compatible HotWire 7924 – Rear Panel
Plug the power transformer into the appropriate (115 or 230 Vac) power outlet.
Connect the power lead into the –48 Vdc jack on the rear panel.
To obtain information on the power supplies and power cord adapters available,
refer to
Warranty, Sales, and Service Information on page A at the beginning of
this User’s Guide.

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7924-A2-GB20-30 October 1997
Using Terminal and Switchpack
Modes 3
Choosing an Interface Mode
You can make configuration changes either through an asynchronous terminal
(Terminal Mode) or by manually changing switches and jumpers on the board
(Switchpack Mode). Terminal Mode is the default setting.
In Terminal Mode:
You change configuration parameters by selecting menu options that appear
on a VT100-compatible terminal attached to the front panel of the termination
unit.
The standalone unit is preconfigured at the factory for CP (customer
premises) operation.
In Switchpack Mode:
You change configuration parameters by moving switchpacks and jumpers on
the board.
The standalone unit is not preconfigured. You must ensure that the
switchpacks and jumpers are set as desired.
You can still display information about the unit from the terminal and run
loopback tests.
Any changes you make in Terminal Mode are lost when you change to
Switchpack Mode.
Connecting to a System Terminal
An optional system maintenance terminal is attached to your Model 7924
standalone termination unit through the modular jack on the front panel.
Terminals can be attached to both endpoints (CO and CP).
The system terminal must be a VT100-compatible terminal or a PC running
emulation software.

Using Terminal and Switchpack Modes
3-2 7924-A2-GB20-30
October 1997
Connect the 9-pin end of the terminal cable into a COM port on your PC. Plug the
other end into the modular jack on the termination unit’s front panel. If your PC
requires a 25-pin connector to the COM port, see Appendix B,
Cable Pin
Assignments
, for the correct cable pinouts.
Make sure the terminal parameters on your terminal or PC are set to:
H9600 Kbps
H8 bit character
HNo parity bit
H1 stop bit
HNo flow control
Press Return at your terminal to activate the Main Menu. The system runs
diagnostics and status checks as it comes up. After a few seconds, the Main
Menu screen appears on your terminal. Menus are described in Chapters 4 and 5
for the DSX-1 and V.35 units, respectively.
Switching Between Terminal and Switchpack Modes
The following procedure is used to change the operating mode of the unit to
either Terminal Mode (the default setting) or Switchpack Mode. Refer to
Chapter 4 (for DSX-1-compatible units) or Chapter 5 (for V.35-compatible units)
for information on changing configuration options using either of these modes.
"Procedure
Use electrostatic discharge protection when handling the circuit board.
To change the mode:
1. Power down the unit and expose the circuit board by loosening the two
screws on the back panel of the unit and sliding off the cover.
2. See Appendix C,
Switchpacks and Jumpers , for jumper locations on your
unit’s board.
— Use jumper P11 for DSX-1-compatible units.
— Use jumper P8 for V.35-compatible units.
3. Place the jumper in the correct position for the desired mode.
— Switchpack Mode is configured by placing the jumper on Pins 2 and 3.
— Terminal Mode is configured by placing the jumper on Pins 1 and 2.
4.
If you are enabling Switchpack Mode: You must set the switchpacks and
jumpers to your desired configuration. Refer to Appendix C,
Switchpacks and
Jumpers
.
5. Replace the cover and screws.
6. Power up the board to reset and enable the new configuration.

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7924-A2-GB20-30 October 1997
Customizing DSX-1-Compatible
Units 4
Accessing Configuration Options
This chapter explains how to change configuration options for HotWire 7924-A1
standalone units that are DSX-1-compatible. Chapter 5 provides similar
information for V.35-compatible units.
Configuration option settings determine how the unit operates. You can change a
unit’s configuration options by:
Selecting the Board Configuration branch of the Main Menu while in Terminal
Mode.
Changing switchpack and jumper settings on the circuit board while in
Switchpack Mode.
The Main Menu for a DSX-1-compatible unit on the customer premises (CP) side
appears as follows:
Command→G123
ATTX – CP – T1 Rate – LOOP AB
T1 HDSL HTUR Main Menu
1) Board Status
2) Performance Monitor
3) Board Configuration
4) Board Reset
5) CP Local Loopback
6) CP Remote Loopback
7) HTUC Menu
?) Redisplays this Menu
Command→
The G123 code denotes
a successful startup
CP units are HDSL Termination
Units – Remote (HTUR)
CO units are HDSL Termination
Units – Central Office (HTUC)

Customizing DSX-1-Compatible Units
4-2 7924-A2-GB20-30
October 1997
This guide depicts the system terminal menus as they appear from a CP unit.
This is the default configuration for Model 7924 standalone units.
Making Changes from the Terminal Interface
The Board Configuration menu displays the current board software and hardware
settings. It also allows you to change certain parameters on the board.
This function is affected by the status of the switchpack (DIP switch control)
setting.
When operating in Terminal Mode (the system default) you can make
configuration changes through the terminal menus.
When operating in Switchpack Mode, you can display configuration
parameters using the terminal menus, but any configuration changes must be
made using the switchpacks and jumpers on the board hardware. Refer to
Making Changes in Switchpack Mode on page 4-5.
To access the Board Configuration menu, enter 3 at the Main Menu Command
prompt.
Command→3
Board Configuration:
1) HDSL Card Type – CP
HDSL Rate Type – T1
2) Loops Enabled – Dual Loop (Loops A and B)
3) T1 Line Encode – B8ZS
4) Framing – D4
5) Line Build Out – 0 to 133 feet, 0dB
HDSL FW Rev – 07
AT+T FW Rev – 1.17
CP Serial # – 085561
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1–5) Board Configuration
6) Switch pack Definitions
7) Line Build–Out Definitions
?) Redisplays this menu
Q) Quit
Config→
Possible values for each parameter are listed in Table 4-1. See Appendix A,
Worksheets , for help in selecting the appropriate configuration options for your
application.