PairGain HLU-431 User manual

HIGAIN LINE UNIT

QUICK INSTALLATION GUIDE

PAIRGAIN TECHNOLOGIES, INC.

ENGINEERING SERVICES

™350-431-116-01/¨

SECTION 350-431-116-01

Model List Number Part Number

HLU-431 1F 150-1504-16

350-431-116-01, Revision 01

ii January 8, 1999 HLU-431 List 1F

Revision History of This Practice

PairGain and HiGain are registered trademarks of PairGain Technologies, Inc.

Information containedin thisdocumentis company private to PairGainTechnologies, Inc.,

and shall not be modified, used, copied, reproduced or disclosed in whole or in part without

the written consent of PairGain.

Other product names mentioned in this practice are used for identification purposes only

and may be trademarks or registered trademarks of their respective companies.

Revision Release Date Revisions Made

01 January 8, 1999 Initial release

350-431-116-01, Revision 01 Using This Technical Practice

HLU-431 List 1F January 8, 1999 iii

USING THIS TECHNICAL PRACTICE

Two types of messages, identified by icons, appear in the text.

If you have comments or questions about this Technical Practice, you can

send email to technical_publications@pairgain.com. Type the productname

and section number of the document in the subject area of the email message.

INSPECTING SHIPMENT

Upon receipt of the equipment:

•Visually inspect it for any signs of shipping damage. Immediately report

any damage to the shipping agent.

•Check the packing list to ensure complete and accurate shipment of each

listed item. If the shipment is incomplete or inaccurate, contact PairGain

as described in the “Certification and Warranty” on page 25. If you must

store the equipment for a prolonged period, store the equipment in its

original container.

Notes contain information about special circumstances.

Cautions indicate the possibility of equipment damage or

the possibility of personal injury.

Table of Contents 350-431-116-01, Revision 01

iv January 8, 1999 HLU-431 List 1F

TABLE OF CONTENTS

Product Overview ________________________________________1

Features ....................................................................................1

Compatibility............................................................................1

Product Description..................................................................2

Installation ______________________________________________5

HDSL Line Voltage Operation______________________________6

Provisioning _____________________________________________6

Using the SEL and Mode Front Panel Buttons ........................6

Default Settings........................................................................7

Using the Craft port..................................................................7

System Options Settings...........................................................9

Testing_________________________________________________12

Doubler Applications .............................................................12

Alarms....................................................................................13

Loopbacks ..............................................................................14

Four-Character Diagnostic Messages.....................................16

Positron High-voltage Isolation Applications........................17

Appendix A: Specifications________________________________19

Appendix B: Service and Support __________________________20

Technical Support...................................................................20

BBS..........................................................................20

World Wide Web.....................................................21

Returns.....................................................................21

Appendix C: Abbreviations _______________________________23

Certification and Warranty __________________Inside back cover

350-431-116-01, Revision 01 Product Overview

HLU-431 List 1F January 8, 1999 1

PRODUCT OVERVIEW

The PairGain®HiGain®Line Unit Model HLU-431 List 1F is the Central

Office (CO) side of a repeaterless T1 transmission system and is used in

conjunction with the HiGain Remote Unit (HRU) to provide a complete

HiGain High-bit-rate Digital Subscriber Line (HDSL) system.

This guide addresses HLU-431 List 1Foperation when used with and without

doublers. For applications without doublers,the HLU-431 List 1F is directly

connected to the HRU by the two cable pairs. For doubler applications, one

doubler may be used in the HDSL loops between the HLU-431 List 1F and

the HRU.

Figure 1 on page 2 shows the front panel of the HLU-431 List 1F. Table 2 on

page 3 identifies front panel features.

FEATURES

•784 kbps full duplex 2BIQ HDSL transmission on two pairs

•Selectable DS-1 pre-equalizer

•Front panel HDSL S/N margin display

•Front panel status LED

•Selectable loopback voltage

•RS-232 Craft port

•Low voltage (140V) doubler application

•Shelf management interface

COMPATIBILITY

The HLU-431 mounts in the HiGain Remote Enclosure (HRE) or HiGain

Universal Enclosure (HUE) shelves listed below. The HLU-431 slot pins are

shown in Figure 2 on page 4.

•HRE-420, Single-slot indoor

•HRE-422, Dual-slot indoor

Product Overview 350-431-116-01, Revision 01

2 January 8, 1999 HLU-431 List 1F

•HRE-425, Twelve-slot indoor

•HRE-450, Single-slot outdoor

•HRE-454, Four-slot outdoor

•HUE-443, three-slot indoor

PRODUCT DESCRIPTION

Figure 1showsthe frontpanelofthe HLU-431List1F,and Table 2 on page 3

describes the various front panel functions. Table 2 on page 3 describes the

LED functions.

Figure 1. HLU-431 List 1F Front Panel

350-431-116-01, Revision 01 Product Overview

HLU-431 List 1F January 8, 1999 3

Table 1. Front Panel Features

Features Function

Front panel display Displays four-character status, provisioning, and alarm system

messages.

Systemoptionbuttons

(MODE and SEL) Permits the user options to be monitored and modified without

the need of a maintenance terminal. Used to initiate all HiGain

loopbacksandtodisplayDS-1lineparametersandlineunitidentity.

Status LED See Table 2 for status descriptions.

Receive and transmit jacks

SPAN Providessplittingjackaccessto(XMT)andfrom(RCV),theHDSL

span at the DSX-1 interface. Breaks the XMT and RCV paths to

permit test signal insertion and retrieval.

BRG Provides non-intrusive bridging jack access to (XMT) and from

(RCV), the HDSL span at the DSX-1 interface. Allows the two T1

payloads to be monitored.

Craft (RS-232) port Provides bidirectional communication between the unit and an

external terminal to allow configuration and performance

monitoring through the Maintenance terminal screens.

CLEI and ECI bar code

label Provides the human-readable Common Language Equipment

Identifier (CLEI) code number and the Equipment Catalog Item

(ECI) bar code number.

List Number Displays the version of the software that relates to the product.

Configuration Number Contains either a five or six-digit warranty configuration number

or a standalone two or three-digit configuration number as

follows:

Digit 1 = Last digit of shipment year

Digits 2 and 3 = Shipment month

Digits 4, 5, and 6 = Configuration number

Table 2. Status LED States

State Description

Green Normal Operation.

Flashing Green HDSL Acquisition.

Flashing Red Minor Alarm.

Red FUSE ALRM.

Yellow Self Test in progress or an HLU-431 List 1F loopback in effect

(CREM) or (NLOC).

Flashing Yellow The HLU-431 List 1F is in an ARMED (pre-loopback) state.

Product Overview 350-431-116-01, Revision 01

4 January 8, 1999 HLU-431 List 1F

Figure 2 shows the card-edge connector pinouts.

Figure 2. Card-edge Connector Pinouts

350-431-116-01, Revision 01 Installation

HLU-431 List 1F January 8, 1999 5

INSTALLATION

Figure 3. Installing the HLU-431 List 1F

To install the HLU-431 into a shelf:

1Slide the unit into the shelf card guides for the desired slot.

2Push the unit in until it touches the backplane card-edge connector and

the retaining latch on the front panel opens.

3Place your thumbs on theHLU-431 frontpanel and push the card into the

card-edge connector until the unit is within the card guides and properly

seated.

HDSL Line Voltage Operation 350-431-116-01, Revision 01

6 January 8, 1999 HLU-431 List 1F

HDSL LINE VOLTAGE OPERATION

The HDSL line voltage is set to 0V on Loop 2 and to -140V on Loop 1. This

setting keeps the HDSL cable pair voltage at or below ground potential,

thereby avoiding corrosion problems that may be caused by cable voltages

more positive than ground.

For both doubler and non-doubler applications, this setting also allows the

HLU-431 List 1F to power single doubler circuits without exceeding 140V

line voltage. This is required when, for example, the HLU-431 List1F is used

with Positron HDSL dc/ac convertor circuits to provide high voltage isolation

between the cable pairs and the HLU-431 List 1F. Such an application occurs

when HiGain is the transport system between utility company power

substations which must be isolated from the cable pair to avoid damage from

Ground Potential Rise (GPR) faults.

PROVISIONING

The HLU-431 List 1F contains a non-volatile RAM (NVRAM) which stores

the system option settings. Use the front panel MODE and SEL buttons or a

PC connected to the Craft port to set the system options. All system options

are retained if shelf power is lost or if the HLU-431 List 1F is unplugged.

Table 3 on page 9 lists the system options for the HLU-431 List 1F.

USING THE SEL AND MODE FRONT PANEL

BUTTONS

To provision the HLU-431 List 1F through the SEL and MODE front-panel

buttons:

1Press the MODE button for approximately 1 second. The message

displayed on thefrontpanelalternatesbetweenthefirstsystem parameter

and its current setting.

2Press the SEL button to step the display through all possible settings of

the parameter being displayed.

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