Paradyne 7924 User Manual

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Page 1

HOTWIRE

MODEL 7924 STANDALONE

T1 HDSL TERMINATION UNIT

USER’S GUIDE

Document No. 7924-A2-GB20-30

October 1997

Page 2

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

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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.

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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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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

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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

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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

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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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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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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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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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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

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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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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

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Customizing DSX-1-Compatible Units

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)

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Customizing DSX-1-Compatible Units

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

To access the Board Configuration menu, enter 3 at the Main Menu Command prompt.

on page 4-5.

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

–––––––––––––––––––––––––––––––––––––––––––––––––––––––

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.

4-2

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Customizing DSX-1-Compatible Units

Table 4-1. DSX-1-Compatible Units Configuration Options (1 of 2)

1) HDSL Card Type

Possible Settings: CP, CO Default Setting: CP

Indicates the placement of the unit in the network configuration. To toggle the card type, enter 1 at the Config prompt.

CP – Unit is on the customer premises (remote) side of the HDSL connection. CO – Unit is on the central office (or central site) side of the HDSL connection.

2) Loops Enabled

Possible Settings: Single, Dual Default Setting: Dual

Specifies which loops on the HDSL line are to be used in the connection. To change the loops that are enabled, enter 2 at the Config prompt. The system then prompts you to specify either (S)ingle or (D)ual Loops.

Dual – Loops A and B are enabled. Single – Only Loop A is enabled.

3) T1 Line Encode

Possible Settings: B8ZS, AMI Default Setting: B8ZS

Specifies the type of line encoding used to ensure ones density in the transmission signal. To toggle the encoding method, enter 3 at the Config prompt.

B8ZS – Binary 8 Zero Substitution. AMI – Alternate Mark Inversion.

4) Framing

Possible Settings: D4, Extended Superframe, Unframed Default Setting: D4

Specifies the type of framing to be used. To toggle the framing method, enter 4 at the Config prompt.

D4 – Commonly used framing method on T1 circuits, consisting of 12 frames of 192 bits with the 193rd bit used for error checking and other functions. Also called Super Framing.

Extended Superframe – Framing method consisting of 24 frames of 192 bits each, with the 193rd bit providing timing and other functions. An enhanced version of D4.

Unframed – Framing is disabled.

NOTE: When connecting to a V.35-compatible unit, refer to page A-4 for more

information before selecting this option.

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Customizing DSX-1-Compatible Units

Table 4-1. DSX-1-Compatible Units Configuration Options (2 of 2)

5) Line Build Out

Possible Settings: 0 to 133 ft, 133 to 266 ft, 266 to 399 ft, 399 to 533 ft, 533 to 655 ft Default Setting: 0 to 133 ft

To change the line build-out length, enter 5 at the Config command prompt. Y ou will then be prompted to select from the following options:

1) 0 to 133 ft

2) 133 to 266 ft

3) 266 to 399 ft

4) 399 to 533 ft

5) 533 to 655 ft N) No change

NOTE: Additional options may be displayed on your terminal. These other options

(for –7.5, –15, and –22.5 dB) are not for use with this product. Use of these options will cause a weak signal and degrade performance. Select from options 1 through 5 only .

You must reset the board for changes to the card type or loops enabled (options 1 or 2) to take effect. A system message is displayed on the terminal to remind you to reset the board. To reset the board, choose option 4 from the Main Menu or cycle the power to the board.

All configuration settings are stored in nonvolatile memory and are not affected by the reset.

The HDSL rate type, firmware revision numbers, and the serial number displayed on the Board Configuration screen cannot be changed.

4-4

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Making Changes in Switchpack Mode

When operating in Switchpack Mode, you can change configuration options by moving switches on the board hardware.

Customizing DSX-1-Compatible Units

To enable Switchpack Mode, refer to

Switchpack Modes

 Procedure

Use electrostatic discharge (ESD) protection when handling the circuit board. To open the unit and make changes while in Switchpack 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. Refer to the board layout illustration in Appendix C,

Jumpers

, to locate switchpack S1.

3. Place the switchpack in the correct position for each desired configuration option. Definitions of switchpack positions are provided in Appendix C,

Switchpacks and Jumpers

For example, to change a unit’s card type from CO to CP, move switch 1 on switchpack S1 to the OFF position.

4. Replace the cover and screws.

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

Displaying Switchpack Definitions

in Chapter 3,

Switching Between Terminal and

Using Terminal and Switchpack Modes.

Switchpacks and

Enter 6 at the Config prompt to display the definition of each position in the switchpack. Switchpack definitions are also listed in Appendix C,

and Jumpers

Config→ 6

Switch pack definition: (OFF=0, ON=1)

1 – CO/CP OFF=CP, ON=CO 2 – B8ZS OFF/ON 3 – Dual/Single Loop Mode OFF=Dual, ON=Single 4 – Line Build Out Bit 0 5 – Line Build Out Bit 1 6 – Line Build Out Bit 2 7,8 – 00=Unframed, 01=D4

Config→

11=ESF

Switchpacks

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Customizing DSX-1-Compatible Units

Displaying Line Build-Out Definitions

Enter 7 at the Config prompt to display the switchpack and board settings for line build-out. Use this information to change the line build-out parameter manually. (Switchpack definitions are also listed in Appendix C,

Config→ 7

***** SWITCHPACK SETTINGS FOR LINE BUILD OUT *******

Switchpack Settings ––––––––––––––––––––––––––––––––––– Position #4 – Bit 0 OFF=0, ON=1 Position #5 – Bit 1 OFF=0, ON=1 Position #6 – Bit 2 OFF=0, ON=1

************ Switchpack Definitions ************ Bit 2 Bit 1 Bit 0 Application ––––––––––––––––––––––––––––––––––––––––––––––– 0 0 0 0 to 133 feet – 0dB 0 0 1 133 to 266 feet 0 1 0 266 to 399 feet 0 1 1 399 to 533 feet 1 0 0 533 to 655 feet 1 0 1 -7.5 dB 1 1 0 -15 dB 1 1 1 -22.5 dB

Switchpacks and Jumpers

Config→

For example, to change the line build-out to 399 to 533 feet, while in Switchpack Mode, set position 6 OFF and positions 4 and 5 ON.

NOTE:

The switch combinations for –7.5, –15, and –22.5 dB line build-out are not for use with this product. Use of these settings will cause a weak signal and degrade performance.

4-6

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Customizing V.35-Compatible Units

Accessing Configuration Options

This chapter explains how to change configuration options for HotWire 7924-A1 models that are V.35-compatible. Chapter 4 provides similar information for DSX-1-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 V.35-compatible unit on the customer premises (CP) side appears as follows:

Command→ G123

ATTX – CP – T1 – LOOP AB V.35 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→

This guide depicts the system terminal menus as they appear from a CP unit. This is the default configuration for Model 7924 standalone units.

The G123 code denotes a successful startup

CP units are HDSL Termination Units – Remote (HTUR) CO units are HDSL Termination Units – Central Office (HTUC)

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Customizing V.35-Compatible 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

To access the Board Configuration menu, enter 3 at the Main Menu Command prompt.

Command→ 3

on page 5-4.

Board Configuration:

1) HDSL Card Type – CP HDSL Interface/Rate – V.35 T1

2) Loops Enabled – Dual Loop (Loops A and B)

3) Payload Rate – 1536 Kbps (24x64) Transmit Timing – Loop HDSL FW Rev – 03 AT+T FW Rev – 1.17 CP Serial # – 85649

–––––––––––––––––––––––––––––––––––––––––––––

1–3) Board Configuration

4) Switch pack Definitions ?) Redisplays this menu Q) Quit

Config→

5-2

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Customizing V.35-Compatible Units

Possible values for each parameter are listed in Table 5-1. See Appendix A,

Worksheets

, for help in selecting the appropriate configuration options for your

application.

Table 5-1. V.35-Compatible Units Configuration Options

1) HDSL Card Type

Possible Settings: CP, CO Default Setting: CP

Indicates the placement of the unit in the network configuration. To toggle the card type, enter 1 at the Config prompt.

CP – Unit is on the customer premises side of the HDSL connection. CO – Unit is on the central office (or central site) side of the HDSL connection.

2) Loops Enabled

Possible Settings: Single, Dual Default Setting: Dual

Dual – Loops A and B are enabled. Single – Only Loop A is enabled.

3) Payload Rate

Possible Settings: 1 through 9 (for 64 through 1536 kbps) Default Setting: 9 (1536 kbps)

Specifies the desired payload rate.

1 – 1 x 64 (64 kbps) 6 – 8 x 64 (512 kbps) 2 – 2 x 64 (128 kbps) 7 – 12 x 64 (768 kbps) 3 – 3 x 64 (192 kbps) 8 – 16 x 64 (1024 kbps) 4 – 4 x 64 (256 kbps) 9 – 24 x 64 (1536 kbps) 5 – 6 x 64 (384 kbps) N – No change to rate

Options 8 and 9 (1024 and 1536 kbps) are only available when Loops A and B are enabled. If only Loop A is enabled, the maximum payload rate is 768 kbps (option 7).

You must reset the board for changes to the card type or loops enabled (options 1 or 2) parameters to take effect. A system message is displayed on the terminal to remind you to reset the board. To reset the board, choose option 4 from the Main Menu or cycle the power on the board.

All configuration settings are stored in nonvolatile memory and are not affected by the reset.

The transmit timing, HDSL interface/rate, firmware revision numbers, and serial number displayed on the Board Configuration screen cannot be changed.

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Customizing V.35-Compatible Units

Making Changes in Switchpack Mode

When operating in Switchpack Mode, you can change configuration options by moving switches on the board hardware.

To enable Switchpack Mode, refer to

Switchpack Modes

in Chapter 3,

Switching Between Terminal and

Using Terminal and Switchpack Modes.

 Procedure

Use electrostatic discharge (ESD) protection when handling the circuit board. To open the unit and make changes while in Switchpack Mode:

1. Power down the unit and remove the enclosure cover, exposing the circuit board.

2. Find the switchpack for the configuration options you wish to change. Switchpack positions are defined in Appendix C,

3. Place the switchpacks in the correct position for each desired configuration option. The switchpacks are not preconfigured.

For example, to change a unit’s card type from CO to CP, move switch 1 on switchpack S1 to the OFF position.

4. Verify that switches 4 and 5 on switchpack S1 are set to ON and OFF, respectively.

5. Replace the cover and screws.

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

Switchpacks and Jumpers

5-4

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Displaying Switchpack Definitions

Enter 4 at the Config prompt to display the definition of each position in the two switchpacks. Switchpack definitions are also listed in Appendix C,

and Jumpers

Config→ 4

Switch pack 1 definition:

1 – CO/CP OFF=CP, ON=CO 2 – Dual/Single Loop Mode OFF=Dual, ON=Single 3 – Not Used 4,5 – 00, 11 Invalid

6–8 – Not Used

Switch pack 2 definition:

1 – 64 Kbps (1x64) OFF=0, ON=1 2 – 128 Kbps (2x64) OFF=0, ON=1 3 – 192 Kbps (3x64) OFF=0, ON=1 4 – 256 Kbps (4x64) OFF=0, ON=1 5 – 384 Kbps (6x64) OFF=0, ON=1 6 – 512 Kbps (8x64) OFF=0, ON=1 7 – 768 Kbps (12x64) OFF=0, ON=1 8 – 1024 Kbps (16x64) OFF=0, ON=1 All switches off = 1536 Kbps (24x64)

Customizing V.35-Compatible Units

Switchpacks

01 = Invalid, 10 = Loop Timing

Config→

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Monitoring the Unit

What to Monitor

This chapter presents information on how to access and monitor status and performance statistics for the unit and its network connection. You can monitor operations by viewing the:

 Board Status option from the Main Menu  Performance Monitor option from the Main Menu

 Board Status and Performance Monitor options from the HTUC (or HTUR)

menu (for displaying information about the unit on the other end of the connection)

 Front Panel LEDs

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Monitoring the Unit

Board Status

Board Status option from the Main Menu displays HDSL circuit operational status. Enter 1 at the Main Menu Command prompt to display board status.

Command→ 1

T1 STATUS: Network is UP

LOOPBACK STATUS: OFF

HDSL STATUS: LOOP A is UP, LOOP B is UP

S/N RATIO: Loop A = 44.0 dB, Loop B = 43.5 dB

Command→

Board Status for DSX-1-Compatible Unit

Command→ 1

DTR: ACTIVE DSR: ACTIVE

LOOPBACK STATUS: OFF

HDSL STATUS: LOOP A is UP, LOOP B is UP

S/N RATIO: Loop A = 44.0 dB, Loop B = 43.5 dB.

Command→

Board Status for V.35-Compatible Unit

 T1 STATUS displays one of the following:

— Network is Up — Receive Carrier Loss — Receive Remote Alarm — Receive Unframed All 1’s.

 DTR and DSR are either ACTIVE or INACTIVE. DSR becomes active in

response to DTR (with HDSL loops up and data transmission possible).

6-2

 LOOPBACK ST ATUS is either ON or OFF.  HDSL ST ATUS displays whether each loop is UP, DOWN, or DISABLED.  S/N (Signal-to-Noise) RATIO is not displayed if loops are down or disabled.

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Performance Statistics

Performance monitoring allows detailed observations of error conditions detected on the circuits. Performance Monitor statistics can be displayed in defined time periods from the previous minute to the previous 24 hours, plus a running total. These statistics can be cleared and restarted at any time.

Performance statistics are updated every second. Enter 2 at the Main Menu Command prompt to display the Performance Monitor

menu.

Command→ 2

Time Since Board Power–Up or Reset: 0000d 00h 00m 00s 1 – 1 minute stats. 2 – 15 minute stats. 3 – 1 hour stats. 4 – 12 hour stats. 5 – 24 hour stats. 6 – Running total. 7 – Clear Statistics. Q – Quit

Monitoring the Unit

stats→

Select a time frame from the list to display statistics for a specified time period. Accumulated performance statistics may be cleared and restarted by selecting

option 7 on the Performance Monitor menu.

NOTE:

Be sure you want to clear all statistics before pressing 7. There is no verification dialog.

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Monitoring the Unit

stats→ 1

Current 1 minute: HDSL Errors: T1 Errors:

FAW LoopA – 0 BPV – 0 FAW LoopB – 0 CRC – 0 CRC LoopA – 0 MOS – 0 CRC LoopB – 0 FEBE LoopA – 0 FEBE LoopB – 0

Previous 1 minute:

FAW LoopA – 0 BPV – 0 FAW LoopB – 0 CRC – 0 CRC LoopA – 0 MOS – 0 CRC LoopB – 0 FEBE LoopA – 0 FEBE LoopB – 0

stats→

Performance Statistics for DSX-1-Compatible Unit

stats→ 1

Current 1 minute: HDSL Errors: FAW LoopA 0 FAW LoopB 0 CRC LoopA 0 CRC LoopB 0 FEBE LoopA 0 FEBE LoopB 0

Previous 1 minute HDSL Errors: FAW LoopA 0 FAW LoopB 0 CRC LoopA 0 CRC LoopB 0 FEBE LoopA 0 FEBE LoopB 0

stats→

6-4

Performance Statistics for V.35-Compatible Unit

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Monitoring the Unit

The type of statistics displayed under the T1 Errors column depends on the type of framing selected. When the unit is configured for D4 framing, FAS (Frame Alignment Signal) errors are reported. When the unit is configured for ESF framing, CRC (Cyclic Redundancy Check) errors are reported.

Refer to the

Glossary

Remote Unit Information

The same type of information provided for the locally attached unit can also be displayed (but not changed) for the unit on the other side of the connection.

You can display information about the CO unit by using the HTUC menu options from a terminal attached to the CP unit, and you can display information about the CP unit by using the HTUR menu options from a terminal attached to the CO unit.

To access the HTUC or HTUR menu, enter 7 at the Main Menu Command prompt.

***** HTUC Menu *****

1) Board Status

2) Performance Monitor

3) Board Configuration

4) Line Build Out Configuration Help ?) Redisplays this Menu Q) Quit

HTUC Command→

for definitions of the errors reported.

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Monitoring the Unit

Front Panel LEDs

DSX-1-Compatible Unit

Upon power up, the first three LEDs blink in sequence, indicating a successful start configuration. The green PWR LED lights whenever power is applied to the board. Loop LEDs blink until the loop has been synchronized and then remain off.

T1 HDSL

TERMINAL

NETWORK SYSTEM HDSL

Local

Remote

Loop Bk

PWR

FAIL

Loop A

Loop B

7900

97-15312

LED Meaning

Local ON: The local T1 interface has a loss of signal. Remote ON: The remote T1 interface has a loss of signal. Loop Bk ON: A loopback has been initiated for testing the equipment connected to

Testing

this unit. Refer to Chapter 7, PWR ON: Power is applied to the unit. FAIL ON: The processor has halted and repairs are required. Loop A ON: HDSL Loop A has failed.

Blinking: HDSL Loop A is synchronizing with the far-end unit (such as

when the units are coming up after a reset). If the LED blinks for more

than 60 seconds, loss of signal has occurred.

Off: Loop A is enabled and synchronized.

, for more information.

6-6

Loop B ON: HDSL Loop B has been disabled (only Loop A is in use) or has

failed.

Blinking: HDSL Loop B is synchronizing with the far-end unit (such as

when the units are coming up after a reset). If the LED blinks for more

than 60 seconds, loss of signal has occurred.

Off: Loop B is enabled and synchronized.

October 1997

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V.35-Compatible Unit

Monitoring the Unit

The green PWR LED lights whenever power is applied to the board. Loop LEDs blink until the loop has been synchronized and then remain off.

T1 HDSL

TERMINAL

DTR

DSR

CTS

RTS

RXD

TXD

Loop Bk

PWR

FAIL

Loop A

Loop B

7900

97-15313

LED Meaning

Loop Bk ON: A loopback has been initiated for testing the equipment connected to

Testing

this unit. Refer to Chapter 7, PWR ON: Power is applied to the unit.

, for more information.

FAIL ON: The processor has halted and repairs are required. Loop A ON: HDSL Loop A has failed.

Blinking: HDSL Loop A is synchronizing with the far-end unit (such as

when the units are coming up after a reset). If the LED blinks for more

than 60 seconds, loss of signal has occurred.

Off: Loop A is enabled and synchronized. Loop B ON: HDSL Loop B has been disabled (only Loop A is in use) or has

failed.

Blinking: HDSL Loop B is synchronizing with the far-end unit (such as

when the units are coming up after a reset). If the LED blinks for more

than 60 seconds, loss of signal has occurred.

Off: Loop B is enabled and synchronized.

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Testing

Detecting a Problem

The unit can detect and report problem conditions and perform diagnostic tests. The unit offers a number of indicators to alert you to possible problems, as described in Chapter 6,

 Front Panel LEDs  Board status and performance statistics

Monitoring the Unit

 Remote unit board status and performance statistics

Understanding Loopback Tests

Loopback is a diagnostic function that enables a technician to isolate equipment on the HDSL circuit to determine where on the circuit trouble may be occurring. Loopback takes the system off-line. Data received from the DTE (T1 or V.35 application equipment) is looped back, as depicted in Figures 7-1 through 7-4.

“Local” and “remote” refer to the point at which the data is looped back. In a local loopback the data is reflected back by the local unit (the unit that initiated the loopback). In a remote loopback, the data is passed on to the remote (far-end) unit and then reflected back.

Loopback tests are initiated through the terminal interface from either the CO or CP side of the HDSL connection.

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Testing

Local Loopbacks

 When a local loopback is enabled, the red Loop Bk LED on the front panel of

the initiating unit lights up and remains lit until the loopback is disabled.

 The data flow is indicated by the bold thick arrows in Figures 7-1 and 7-2.  When the CO initiates a local loopback, an Alarm Indication Signal (AIS) is

received at the CP end (only if the CP end is G.703-compatible). (AIS is not received at V.35-compatible CP units.)

CO CP

Diagnostic Equipment

E1 HDSL

7900

Terminal

Loop Bk

LED lights

E1 HDSL

AIS = Alarm Indication Signal

Figure 7-1. Local Loopback, Initiated at the CO Unit

CO CP

Diagnostic Equipment

E1 HDSL

7900

E1 HDSL

AIS

Diagnostic

7900

Equipment

97-15514-01

Diagnostic

7900

Equipment

Loop Bk

LED lights

7-2

Figure 7-2. Local Loopback, Initiated at the CP Unit

October 1997

Terminal

97-15518-01

7924-A2-GB20-30

Page 39

Remote Loopbacks

Testing

 When a remote loopback is enabled, the red Loop Bk LED on the front panel

of the remote-end unit (CO or CP) lights up and remains lit until the loopback is disabled. The loopback LED on the initiating unit does not light.

 A message appears on the remote-end unit reporting that it has been put into

loopback.

 The data flow is indicated by the bold thick arrows in Figures 7-3 and 7-4.  When the CO initiates a remote loopback, an Alarm Indication Signal (AIS) is

received at the CP end (only if the CP end is G.703-compatible). (AIS is not received at V.35-compatible CP units.)

CO CP

Diagnostic Equipment

E1 HDSL

7900

Terminal

E1 HDSL

Loop Bk

LED lights

AIS = Alarm Indication Signal

Figure 7-3. Remote Loopback, Initiated at the CO Unit

CO CP

Diagnostic Equipment

E1 HDSL

7900

Loop Bk

LED lights

E1 HDSL

AIS

Diagnostic

7900

Equipment

97-15515-01

Diagnostic

7900

Equipment

7924-A2-GB20-30

Terminal

Figure 7-4. Remote Loopback, Initiated at the CP Unit

October 1997

97-15517-01

7-3

Page 40

Testing

Starting and Stopping Loopbacks

To start or stop a local loopback test, enter 5 at the Main Menu Command prompt.

Command→ 5

Local Loopback is Enabled! Command→ 5

Local Loopback is Disabled!

To start or stop a remote loopback test, enter 6 at the Main Menu Command prompt.

Command→ 6

Remote Loopback is Enabled! Command→ 6

Remote Loopback is Disabled!

 When you stop a loopback test (local or remote), both units automatically

reset themselves in order to return to normal operation.

 A loopback may not be started on units that have just been reset. After a

reset, the units require approximately one minute for the circuit (HDSL connection) to stabilize. If you attempt to start a loopback during this time, the following error message appears: “PLEASE WAIT! Circuit is stabilizing.”

 Only one loopback may be run at a time. If a loopback is already enabled, the

following error message appears and no other loopback may be started until the first loopback is disabled: “CANNOT EXECUTE COMMAND! Current loopbacks must be removed first.”

7-4

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Page 41

Resetting the Unit

To reset the board, enter 4 at the Main Menu Command prompt. This is equivalent to cycling the power.

If “y” is selected, the Main Menu reappears, the loops go down, and the FAIL (reset) LED lights up.

Pressing any key other than “y” is interpreted as an “n”.

Testing

Command→ 4

Reset will bring the loops down. Are you sure? (y/n) Command→

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Page 42

Worksheets

Overview

The worksheets in this appendix show the correct configuration settings based on the types of units (DSX-1-compatible or V.35-compatible) on either end of the HDSL connection. There are two combinations of the two types of units:

 DSX-1-compatible units on both ends  V.35-compatible unit on the CP end, DSX-1-compatible unit on the CO end

NOTE:

HotWire 7924 V.35-compatible units are not designed for use at an HDSL connection. If your application requires V.35 equipment at both ends of an HDSL connection, consider using two Hotwire 7925 E1 HDSL termination units. Contact your sales representative for more information.

both

ends of

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Page 43

Worksheets

DSX-1-to-DSX-1 Configuration

Multiplexer

DSX-1

DSX-1 Unit

Customer Premises

Cross-campus

2- or 4-wire

facility

Multiplexer

DSX-1

DSX-1 Unit

Central Site

97-15296

To connect two DSX-1-compatible units, configure the units as follows. Terminal mode factory defaults are in bold (for Switchpack mode defaults, see Appendix C,

Switchpacks and Jumpers

Configuration Option

Card Type CP (default) CO Loops Enabled Dual (Loops A & B) or

T1 Line Encode B8ZS or AMI Must be same as CP side Framing D4, Extended Superframe,

Line Build-Out Enter 5 at the Config

DSX-1-Compatible Unit (Customer Premises)

Single (Loop A)

or Unframed

command prompt. Select from the following options:

1) 0 to 133 ft

2) 133 to 266 ft

3) 266 to 399 ft

4) 399 to 533 ft

5) 533 to 655 ft

DSX-1-Compatible Unit (Central Site)

Must be same as CP side

Enter 5 at the Config command prompt. Select from the following options:

1) 0 to 133 ft

2) 133 to 266 ft

3) 266 to 399 ft

4) 399 to 533 ft

5) 533 to 655 ft

A-2

7924-A2-GB20-30October 1997

Page 44

DSX-1-to-V.35 Configuration

Worksheets

LAN

Router

Customer Premises

V.35

V.35 Unit

Cross-campus

2- or 4-wire

facility

Multiplexer

DSX-1

Central Site

97-15420

To connect a V.35-compatible unit on the CP side and a DSX-1-compatible unit on the CO side, configure the units as follows. Terminal mode factory defaults are in bold (for Switchpack mode defaults, see Appendix C,

Jumpers

Configuration Option

Card Type CP CO Loops Enabled Dual (Loops A & B) or

Payload Rate 1 – 9 (64 – 1536 kbps)

V.35-Compatible Unit (Customer Premises)

Single (Loop A)

Options 8 (1024 kbps) and 9 (1536 kbps) are only available if both Loops A & B are enabled.

DSX-1-Compatible Unit (Central Site)

Must be same as CP side

N/A

Switchpacks and

Framing N/A Use D4, Extended Superframe, or

Unframed. See

Operation

selecting Unframed. T1 Line Encode N/A B8ZS or AMI Line Build-Out N/A Enter 5 at the Config command

prompt. Select from the following

options:

1) 0 to 133 ft

2) 133 to 266 ft

3) 266 to 399 ft

4) 399 to 533 ft

5) 533 to 655 ft

Unframed

on page A-4 before

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Page 45

Worksheets

Unframed Operation

Some units do not support unframed operation. To determine whether or not your DSX-1-compatible unit supports unframed operation when connected to a V.35-compatible unit, all three of the following conditions must be true:

1. The DSX-1-compatible unit must have a firmware revision number of seven

(07) or higher. If you have a DSX-1-compatible

standalone

unit, display the HDSL FW

(firmware) revision number by selecting the Board Configuration option (3) from the Main Menu (a system terminal is required).

If you have a DSX-1-compatible

nest-mounted

unit, refer to the

HotWire

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

Guide

2. The V.35-compatible unit must have an HDSL firmware revision number of

three (03) or higher. To display the HDSL FW (firmware) revision number, select the Board

Configuration option (3) from the Main Menu (a system terminal is required).

3. The V.35-compatible unit must have a hardware revision number of five (05)

or higher. To determine the hardware revision number, look at the label on the bottom of

the standalone unit that has the “CE” and “CSA” logos. The second row of numbers on this label should be “900P005705” or higher. The last two digits of this number (05) indicate the hardware revision number.

Time Slot (DS0) Assignments

When the V.35 payload rate is set for less than 1536 kbps, that payload rate determines which T1 DS0s are used, as follows:

V.35 Payload Rate

1 (64 kbps) 1 2 (128 kbps) 1, 2 3 (192 kbps) 1 – 3 4 (256 kbps) 1 – 4 5 (384 kbps) 1 – 6 6 (512 kbps) 1 – 8 7 (768 kbps) 1 – 12 8 (1024 kbps) 1 – 16

DSX-1 T1 DS0s Used

A-4

7924-A2-GB20-30October 1997

Page 46

DSX-1-Compatible Units Configuration Worksheet

Board Configuration

Worksheets

Configuration Option Settings

Card Type CP, CO Loops Enabled Dual, Single T1 Line Encode B8ZS, AMI Framing D4, Extended Superframe, Unframed Line Build Out 1) 0 to 133 feet – 0 dB

2) 133 to 266 feet

3) 266 to 399 feet

4) 399 to 533 feet

5) 533 to 655 feet

V.35-Compatible Units Configuration Worksheet

Board Configuration

Configuration Option Settings

Card Type CP, CO Loops Enabled Dual, Single

Default in Bold

Payload Rate 1 – 1 x 64 (64 kbps)

2 – 2 x 64 (128 kbps) 3 – 3 x 64 (192 kbps) 4 – 4 x 64 (256 kbps) 5 – 6 x 64 (384 kbps) 6 – 8 x 64 (512 kbps) 7 – 12 x 64 (768 kbps) 8 – 16 x 64 (1024 kbps)

9 – 24 x 64 (1536 kbps)

N – No change to rate

Options 8 and 9 require Loops A and B.

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A-5

Page 47

Cable Pin Assignments

Terminal Connection Cable Pin Assignments

This section defines the pin assignments for the terminal cable from the front panel modular jack to your PC’s COM port.

If your PC’s COM port requires a 9-pin D-shell connector, the cable must use the following pin assignments.

RXD

TXD

GND

Modular

1 4 5 7 8

9-Pin

D-Shell Pin

2 5 1 4 6 7 8

TXD

RXD GND DCD DTR DSR RTS CTS

97-15268-0

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October 1997

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Page 48

Cable Pin Assignments

If your PC’s COM port requires a 25-pin D-shell connector, the cable must use the following pin assignments.

RXD

TXD

GND

Modular

1 4 5 7 8

25-Pin

D-Shell Pin

TXD

RXD

GND

DSR

DCD

DTR

RTS

CTS

97-15442-0

HDSL Loop Connection Cable Pin Assignments

The HDSL modular connector that plugs into the rear panel of the unit has the following pin assignments.

Signal

1 Loop A Tip 2 Loop A Ring 3 Loop B Tip 4 Loop B Ring 5 – 8 open

NOTE:

Pin 1 is on the left when viewing the jack from its inserted position.

B-2

7924-A2-GB20-30October 1997

Page 49

T1 Network Connection Cable Pin Assignments

The modular connector that plugs into the rear panel of DSX-1-compatible units has the following pin assignments.

Cable Pin Assignments

1 Tx Ring 2 Tx Tip 3 open 4 Rx Ring 5 Rx Tip 6 – 8 open

Signal

NOTE:

Pin 1 is on the left when viewing the jack from its inserted position.

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October 1997

B-3

Page 50

Cable Pin Assignments

V.35 Connection Cable Pin Assignments

The connector that plugs into the rear panel of V.35-compatible units has the following pin assignments.

CCITT Code

101 A PG Protective Ground Machine ground 102 B SG Signal Ground Ground reference for all circuits 105 C RTS ← Request to Send DTE has message to send 106 D CTS → Clear to Send DCE is ready to accept and transmit DTE data 107 E DSR → Data Set Ready DCE is ready to operate 109 F RLSD → Data Channel

108 H DTR ← Data Receiver Ready DTE is ready to operate 141 L LL ← Local Loopback Local loopback 140 N RDL ← Loopback/MaintenanceRemote loopback

103 P TXD ← Transmit Data (A) Data generated by DTE 104 R/D RXD → Received Data (A) Data received by DTE 103 S TXD ← Transmitted Data (B) Data generated by DTE 104 R RXD → Received Data (B) Data received by DTE

Pin Name

Direction DCE DTE

Function Description

DCE is receiving a carrier signal Received Line Signal Detector

113 U EXT

CLK

115 V RSET → Receiver Signal

113 W EXT

CLK

115 X RSET → Receiver Signal

114 Y TSET → Transmit Signal

114 a TSET → Transmit Signal

142 n TST → Test Indicator Reserved for test

← Transmitter Signal

Element Time (A)

Element Timing (A)

← Transmitter Signal

Element Timing (B)

Element Timing (A)

Element Timing (B)

To help detect center of signaling element on BA

To help detect center of signaling element on BB

To help detect center of signaling element on BA

To help detect center of signaling element on BB

To help detect center of signaling element on BA

To help detect center of signaling element on BB

B-4

7924-A2-GB20-30October 1997

Page 51

Switchpacks and Jumpers

DSX-1-Compatible Units

Use Figure C-1 to assist you in locating the switchpacks and jumpers on the board.

The jumper and switchpack detailed in Figure C-1 are used to change configuration options. All other jumpers (listed below) must remain as positioned at the factory.

Jumper

P1 2–3 P3 No Jumper P8 2–3 P9 2–3 P10 1–2 P11 1–2 P12 1–2

Pins (Factory-Setting)

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October 1997

C-1

Page 52

Switchpacks and Jumpers

VT100 Terminal

Modular Jack

Switchpack S1

Position

4, 5, 6

7, 8

678

12345

Settings*

OFF = CP

ON = CO

OFF = AMI line encoding

ON = B8ZS line encoding

OFF = Loops A and B

ON = Loop A 000 = 0–133 ft

100 = 133–266 ft 010 = 266–399 ft 110 = 399–533 ft 001 = 533–655 ft

00 = Unframed 01 = D4

11 = ESF

123 123

P10

123

321

Jumper P11

123

P12

P11

Pins* 1-2

2-3

97-15379-02

Settings* Terminal Mode

Switchpack Mode

* Default in bold

HDSL Line Jack

Figure C-1. DSX-1-Compatible Unit Switchpack and Jumper Locations

 Pin 1 on jumpers is labeled on the board.  The ON position is labeled on the switchpack.  Positions 4, 5, and 6 on Switchpack S1 work as a group. Set position 4 to the

first digit, position 5 to the second digit, and position 6 to the last digit. For example, set 4 and 5 ON and 6 OFF for 399–533 ft.

 Positions 7 and 8 on Switchpack S1 work as a pair. Set position 7 to the first

digit and position 8 to the second digit. For example, set 7 OFF and 8 ON for D4 framing.

C-2

7924-A2-GB20-30October 1997

Page 53

V.35-Compatible Units

Use Figure C-2 to assist you in locating the switchpacks and jumpers on the board.

The jumper and switchpacks detailed in Figure C-2 are used to change configuration options. All other jumpers (listed below) must remain as positioned at the factory.

Switchpacks and Jumpers

Jumper

P1 1–2 P2 1–2 P4 2–3 P5 No Jumper P8 1–2 P9 2–3 P10 2–3 P11 1–2

Pins (Factory-Setting)

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October 1997

C-3

Page 54

Switchpacks and Jumpers

VT100 Terminal

Modular Jack

Switchpack S1

12345

Position

3 4, 5 6, 7, 8

* Default in bold

Settings*

OFF = CP

ON = CO

OFF = Loops A and B

ON = Loop A

unused

10 = Loop Clock

unused

678

P1 P2

123 321

HDSL Line Jack

123

Switchpack S2

123

321

P10

123

P11

V.35

12345

Position

1 2 3 4 5 6 7 8

Jumper P8

Pins* 1-2

2-3

678

Settings*

ON = 64 kbps ON = 128 kbps ON = 192 kbps ON = 256 kbps ON = 384 kbps ON = 512 kbps ON = 768 kbps ON = 1024 kbps

All ON = 64 kbps

All OFF = 1536 kbps

Settings* Terminal Mode

Switchpack Mode

97-15524-0

C-4

Figure C-2. V.35-Compatible Unit Switchpack and Jumper Locations

 Pin 1 on the jumper is labeled on the board.  The ON position is labeled on the switchpacks.  Positions 4 and 5 on Switchpack S1 work as a pair. Position 4 should be ON

and position 5 should be OFF. No other combinations are valid.

7924-A2-GB20-30October 1997

Page 55

Glossary

AMI BPV

B8ZS

COM port

CP CPE

CRC CTS

CV DCE

Alternate Mark Inversion coding format. Bipolar Violation. A type of error detected by using a modified bipolar signaling method in

which a control code is inserted. Used with AMI coding format. Bipolar with eights and Zeroes Substitution. An encoding scheme for transmitting clear

channel signals over a T1 line. Carrier Detect. A signal indicating that energy exists on the transmission circuit.

Associated with Pin 8 on an EIA-232 interface. Central Office. As used in this manual, CO denotes any central site as distinguished from

the Customer Premises site. Communications port. A computer’s serial communications port used to transmit to and

receive data from a DCE. The DCE connects directly to this port. Customer Premises. Customer Premises Equipment. Terminating equipment supplied by either the customer or

some other supplier that is connected to the telecommunications network (e.g., DSUs, terminals, phones, routers, modems).

Cyclic Redundancy Check. A commonly used method of error detection. Clear to Send. An EIA-lead standard for V.24 circuit CT 106; an output signal

(DCE-to-DTE). Code Violation. This is equivalent to a BPV. Used with HDB3 coding format. Data Communications Equipment. The equipment that provides the functions required to

establish, maintain, and end a connection. It also provides the signal conversion required for communication between the DTE and the network.

DSR

DSX-1 DS1 DTE

DTR

factory defaults FAS FAW

7924-A2-GB20-30

Data Set Ready . An EIA-lead standard for V.24 circuit CT 107; an output signal (DCE-to-DTE).

Digital Signal cross-connection (of network equipment) at T1 rates. Digital Signal level 1. A framing specification for T1 circuits. Data Terminal Equipment. The equipment, such as computers, printers, and routers, that

provide or create data. Data Terminal Ready. An EIA-lead standard for V.24 circuit CT 108; an input signal

(DTE-to-DCE). A data signaling rate common outside the United States. A wideband interface operating at

2.048 Mbps defined by CCITT standards G.703 and G.704. A predetermined set of configuration options for general operation. Frame Alignment Signal. A loss of signal (LOS) error detection. Frame Alignment Word. A loss of synchronization error detection.

October 1997

GL-1

Page 56

Glossary

FCC

FEBE HDB3 HDSL

HTU HTU-C

HTU-M

HTU-R

LED

loopback

MOS

Federal Communications Commission. Board of Commissioners that regulates all U.S. interstate, intrastate, and foreign electrical communication systems that originate from the United States.

Far End Bit Error. Number of errors reported by the remote equipment. High Density Bipolar 3 coding format. High-bit-rate Digital Subscriber Loop. Provides high bandwidth, bi-directional transmission

over copper wire for both T1 and E1 services. Host Termination Unit. A generic reference to either an HTU-C or HTU-R module. Host Termination Unit – Central. The module at the CO (central office) or central site end

of an HDSL connection. Also known as a Network Termination Unit (NTU). Host Termination Unit – Maintenance. A carrier–mounted module used to perform

maintenance operations on one or more HTU-R and HTU-C modules. Host Termination Unit – Remote. The module at the CP (customer premises) end of an

HDSL connection. Also known as a Line Termination Unit (LTU). Light Emitting Diode. A status indicator that responds to the presence of a certain

conditions. Used to test various portions of a data link in order to isolate an equipment or data line

problem. A diagnostic procedure that sends a test message back to its origination point. Multiframes Out of Sync. A performance statistic that counts the number of multiframes

received out of sync.

OOF

reset RTS

RXD

TXD

V.35

Out Of Frame. An error condition in which frame synchronization bits are in error. A network-reported condition.

A reinitialization of the device that occurs at power-up or in response to a reset command. Request to Send. An EIA-lead standard for V.24 circuit CT 105; an input signal

(DTE-to-DCE). Received Data. An EIA-lead standard for V.24 circuit CT 104; an output signal

(DCE-to-DTE). A data signaling rate common in the United States. A term for a digital carrier facility used

to transmit a DS1 formatted signal of 1.544 Mbps. Transmit Data. An EIA-lead standard for V.24 circuit CT 103; an input signal

(DTE-to-DCE). ITU-T standard for a high-speed, 34-pin, DCE/DTE interface.

GL-2

October 1997

7924-A2-GB20-30

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Index

AIS (alarm indication signal), 7-2, 7-3 AMI line encoding, 4-3

B8ZS line encoding, 4-3 board layout

DSX1 compatible unit, C-2 V.35 compatible unit, C-4

board status, 6-2

for remote unit, 6-5

cables

connecting power, 2-2 DSX-1 connection, 2-2 HDSL loop connection pin assignments, B-2 network connection, 2-2 system terminal connection, 3-2 T1 network connection pin assignments, B-3 terminal connection pin assignments, B-1 V.35 connection, 2-2 V.35 connector pin assignments, B-4

card type

DSX-1 compatible units, 4-3 V.35 compatible units, 5-3

changing dip switches and jumpers

DSX-1 compatible units, 4-5

V.35 compatible units, 5-4 COM port settings, 3-2 configuration options

changing in switchpack mode, 4-5, 5-4

changing in terminal mode, 4-2, 5-2

DSX-1 compatible units, 4-3

V.35 compatible units, 5-3

configuration worksheets

DSX1 compatible unit, A-5 V.35 compatible unit, A-5– A-7

configurations

campus network, 1-3 cellular network, 1-5 CO to customer premises, 1-4

customer service, A

D4 framing, 4-3 data rate for V.35 compatible units, 5-3 DS0 assignments, A-4 DSX-1 to DSX-1 configuration, A-2 DSX-1 to V.35 configuration, A-3

extended superframe, 4-3

features, 1-1 firmware revision, A-4 framing options, 4-3 front panel

DSX-1 compatible units, 6-6 V.35 compatible units, 6-7

hardware revision, A-4 HDSL network connection, 2-2 HTUC and HTUR Menus, 6-5

installation, 2-1 interfaces

choosing, 3-1 user, 1-5

7924-A2-GB20-30 October 1997

IN-1

Page 58

Index

jumpers

DSX-1 compatible unit, C-1

procedure for setting, 3-2

V.35 compatible unit, C-3

LEDs, 6-6

DSX-1 compatible unit, 6-6

V.35 compatible unit, 6-7 line build out

how to display , 4-6

options, 4-4 line encoding options, 4-3 local loopback test, 7-2 loopback tests, 7-1

local, 7-2

remote, 7-3

starting and stopping, 7-4 loops enabled

DSX-1 compatible units, 4-3

V.35 compatible units, 5-3

Main Menu

DSX-1 compatible units, 4-1

V.35 compatible units, 5-1 model numbers, 1-2 monitoring

board status, 6-2

performance statistics, 6-3

remote unit, 6-5

rear panel diagram, 2-2 related documents, vi remote loopback test, 7-3 remote unit, accessing menu of, 6-5 resetting the unit, 4-4, 5-3, 7-5

service information, A statistics, performance monitoring, 6-3 switchpack mode

changing to, 3-2 described, 3-1 DSX-1 compatible units, 4-5 V.35 compatible units, 5-4

switchpacks

DSX-1 compatible unit, C-1 V.35 compatible unit, C-3 how to display , 4-5, 5-5

terminal cable pin assignments, B-1 terminal interface, 3-1 terminal mode

changing to, 3-2 connecting terminal for, 3-1 described, 3-1

testing, 7-1

local loopback, 7-2 remote loopback, 7-3 starting and stopping, 7-4

time slot assignments, A-4

network performance statistics, 6-3

parts list, 2-1 payload rate options, 5-3 PC requirements, 3-2 performance statistics, 6-3 pin assignments, B-1 power cord installation, 2-2

IN-2

unframed, 4-3

user interface, 1-5, 3-1

V.35 to DSX-1 configuration, A-3 VT100 interface, 3-1

warranty telephone number, A worksheets, A-1

October 1997

restrictions on use, A-4

7924-A2-GB20-30