Paradyne 7924 User Manual

HOTWIRE

MODEL 7924 STANDALONE

T1 HDSL TERMINATION UNIT

USER’S GUIDE

Document No. 7924-A2-GB20-30

October 1997

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 W eb 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

Printed on recycled paper

October 1997

7924-A2-GB20-30

Important Information

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.

7924-A2-GB20-30 October 1997

Important Information

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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Contents

About This Guide

 Document Purpose and Intended Audience v. . . . . . . . . . . . . . . . . . . . . . . . .

 Document Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Product-Related Documents vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 About HotWire Model 7924 Termination Units

 HotWire 7924-A1 Models and Features 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Typical Configurations 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 User Interface Types 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Installing 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Using 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. . . . . . . . . . . . . . . . .

4 Customizing 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. . . . . . . . . . . . . . . . . . . . . . . . . . .

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Contents

5 Customizing 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Monitoring 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 T esting

A W orksheets

 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 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. . . . . . . . . . . . . . . . . . . .

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B Cable 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. . . . . . . . . . . . . . . . . . . . . . . . . . .

C Switchpacks and Jumpers

 DSX-1-Compatible Units C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 V.35-Compatible Units C-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Glossary

Index

Contents

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iii

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

Chapter 2

Chapter 3

Chapter 4

Chapter 5

About HotWire Model 7924 Termination Units

features of each version of the Model 7924, and typical configurations.

Installing the Unit

make connections.

Using Terminal and Switchpack Modes.

instructions for connecting a VT100-compatible terminal user interface. Also describes how to make manual configuration changes directly on the board hardware.

Customizing DSX-1-Compatible Units

for modifying configuration options by using the terminal interface or DIP switches and jumpers on the board.

Customizing V .35-Compatible Units

for modifying configuration options by using the terminal interface or DIP switches and jumpers on the board.

. Describes how to install the unit and

. Provides instructions

. Describes the

Provides

7924-A2-GB20-30

October 1997

About This Guide

Section Description

Chapter 6

Chapter 7

Appendix A

Appendix B

Appendix C

Glossary Defines acronyms and terms used in this document. Index Lists key terms, acronyms, concepts, and sections in

Product-Related Documents

Monitoring the Unit.

LEDs, and network statistics. Also describes how to monitor the status of the unit on the opposite side of the HDSL connection.

Testing

tests.

Worksheets.

settings, and possible settings to use for planning.

. Provides information about available loopback

Contains all the configuration options, default

Cable Pin Assignments.

details.

Switchpacks and Jumpers.

jumper positions on the board hardware. Includes board layout diagrams.

alphabetical order.

Describes how to monitor unit status,

Contains connector and interface

Defines the switchpack and

Document Number Document Title

7900-A2-GB20

7900-A2-GB21

7900-A2-GN10

7900-A2-GN20

7920-A2-GB20

7925-A2-GB20

To order additional product documentation, refer to

Information

on page A at the beginning of this User’s Guide.

HotWire Model 7900 Basic Maintenance Processor User’s Guide

HotWire Model 7900 SNMP Maintenance Processor User’s Guide

HotWire Model 7900 10-Slot Standalone Shelf Installation Instructions

HotWire Model 7900 Nest and Options Installation Guide

HotWire Models 7924 and 7925 T1 and E1 HDSL Nest Card Termination Units User’s Guide

HotWire Model 7925 Standalone E1 HDSL Termination Unit User’s Guide

Warranty, Sales, and Service

October 1997

7924-A2-GB20-30

About HotWire Model 7924 Termination Units

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

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

Information

on page A at the beginning of this User’s Guide.

Warranty, Sales, and Service

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1-1

About HotWire Model 7924 Termination Units

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.

7924-A1-202 1.544 Mb/s V.35 compatible.

7924-A1-301 1.544 Mb/s DSX-1 compatible.

7924-A1-302 1.544 Mb/s V.35 compatible.

7924-A1-501 1.544 Mb/s DSX-1 compatible.

7924-A1-502 1.544 Mb/s V.35 compatible.

Connection to 120 Vac power supply.

Connection to 230 Vac power supply.

Direct connection to –48 Vdc power supply. For use in a HotWire 7900 10-Slot Standalone Shelf only.

1-2

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7924-A2-GB20-30

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.

About HotWire Model 7924 Termination Units

PBX

DSX-1

DSX-1 Unit

Customer Premises

Multiplexer

DSX-1

DSX-1 Unit

Customer Premises

Cross-campus

2- or 4-wire

facility

Cross-campus

2- or 4-wire

facility

Figure 1-1. Campus Network Applications

PBX

DSX-1

DSX-1 Unit

Central Site

97-15295

Multiplexer

DSX-1

DSX-1 Unit

Central Site

97-15296

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1-3

About HotWire Model 7924 Termination Units

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

Router

Multiplexer

V.35

V.35 Unit

DSX-1

DSX-1 Unit

Telco 2- or 4-wire

customer premises

facilities to

Nest

Cards

7900 Nest

Central Site

Mgmt

Station

DCS

Customer Premises

Figure 1-2. T1 Extension to Customer Premises

97-15294

1-4

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7924-A2-GB20-30

About HotWire Model 7924 Termination Units

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.

DSX-1

Customer Premises

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)

Cell Site

DSX-1 Unit

Cell Site

DSX-1 Unit

Telco 2- or 4-wire

facilities

between Cell Sites

and MTSO

Mobile Telephone

Switching Office (MTSO)

Nest

Cards

7900 Nest

Central Site

Mgmt

Station

DSX-1

Switch

97-15297

7924-A2-GB20-30

 Front Panel LED status indicators (see Chapter 6)

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1-5

Installing the Unit

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

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

Product-Related

7924-A2-GB20-30

October 1997

2-1

Installing the Unit

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:

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

V.35

HDSL

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.

2-2

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Using Terminal and Switchpack Modes

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.

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3-1

Using Terminal and Switchpack Modes

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,

Assignments

Make sure the terminal parameters on your terminal or PC are set to:

H 9600 Kbps H 8 bit character H No parity bit H 1 stop bit H No 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.

Cable Pin

, for the correct cable pinouts.

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, 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.

Switchpacks and Jumpers

, for jumper locations on your

3-2

If you are enabling Switchpack Mode:

4. jumpers to your desired configuration. Refer to Appendix C,

Jumpers

5. Replace the cover and screws.

6. Power up the board to reset and enable the new configuration.

October 1997

You must set the switchpacks and

Switchpacks and

7924-A2-GB20-30

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