PairGain HiGain HDU-451 Manuale utente

HIGAIN DOUBLER UNIT

PAIRGAIN TECHNOLOGIES, INC.

ENGINEERING SERVICES TECHNICAL PRACTICE

™150-451-142-03G¨

SECTION 150-451-142-04

Model List Number Part Number CLEI Code

HDU-451 4B 150-1143-42 T1R5A5HEAA

LISS1

RS 232

TELEPHONE CO PROPERTY

PairGain

LOOPBACK

HDU 451

HiGain DOUBLER

UNIT

HDSL IN

HDSL OUT

150-451-142-04, Revision 04

ii October 8, 1998 HDU-451 List 4B

Revision History of This Practice

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

Information contained in thisdocumentis companyprivate toPairGain Technologies, Inc.,

and shall notbe modified, used, copied, reproduced or disclosedin whole orin 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 October 3, 1997 Initial release

02 November 11, 1997 Minor modifications

03 September 15, 1998 Reformat

04 October 8, 1998 Modify cover information

150-451-142-04, Revision 04 Using This Manual

HDU-451 List 4B October 8, 1998 iii

USING THIS MANUAL

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

See “Abbreviations” on page 32 for a list of abbreviations used throughout

this technical practice.

Notes contain information about special circumstances.

Cautions indicate the possibility of equipment damage or the

possibility of personal injury.

Using This Manual 150-451-142-04, Revision 04

iv October 8, 1998 HDU-451 List 4B

150-451-142-04, Revision 04 Table of Contents

HDU-451 List 4B October 8, 1998 v

TABLE OF CONTENTS

Product Overview________________________________________ 1

Description and Features.......................................................... 1

Applications ............................................................................. 2

Functional Description____________________________________ 4

Outside Enclosure Deployment Rules ..................................... 4

Front Panel............................................................................... 8

Loopback Design Description................................................ 10

Installation ____________________________________________ 11

Inspecting Your Shipment ..................................................... 11

Installing the HDU-451 List 4B............................................. 11

Troubleshooting.....................................................................12

Isolating a Problem.................................................. 12

Solutions to Common Problems.............................. 13

Line Unit Status Menu Messages............................ 14

Monitoring the HDSL System_____________________________ 16

Connecting to the Terminal ................................................... 17

Logging On and Using the Terminal Menus .........................17

Navigating the Terminal Menus ............................................ 18

The Main Menu...................................................................... 19

View Span Status................................................................... 21

View System Settings ............................................................ 23

View Performance Data......................................................... 26

View Performance History .................................................... 27

View Alarm History............................................................... 28

Table of Contents 150-451-142-04, Revision 04

vi October 8, 1998 HDU-451 List 4B

Technical Specifications __________________________________30

Pinouts_________________________________________________31

Abbreviations___________________________________________32

Product Support_________________________________________35

Technical Support...................................................................35

Warranty.................................................................................36

FCC Compliance ....................................................................37

Modifications..........................................................................37

150-451-142-04, Revision 04 List of Figures

HDU-451 List 4B October 8, 1998 vii

LIST OF FIGURES

Figure 1. HiGain Installation with Two Doublers.................................. 3

Figure 2. HDU-451 Block Diagram.......................................................5

Figure 3. The HDU-451 List 4B Front Panel......................................... 8

Figure 4. HiGain Loopbacks. ............................................................... 10

Figure 5. Doubler Log On Screen ........................................................ 18

Figure 6. HDU-451 Main Menu........................................................... 19

Figure 7. Span 1 Status screen.............................................................. 21

Figure 8. System Settings Screen......................................................... 24

Figure 9. Performance Data Span 1 (1 or 2 Doublers).........................26

Figure 10. Performance Data History Span 1 (1 or 2 Doublers)..........27

Figure 11. HLU Alarm History Span 1 (1 or 2 Doublers) ................... 28

Figure 12. HDU-451 List 4B Pin-Outs (active pins are black)............ 31

Figure 13. HDU-451 DB-9 Pin Outs.................................................... 32

List of Tables 150-451-142-04, Revision 04

viii October 8, 1998 HDU-451 List 4B

LIST OF TABLES

Table 1. HDSL Loss Over Cables .........................................................3

Table 2. Deployment Rules for the HRE-423 and HRE-450

Enclosures .......................................................................................6

Table 3. Deployment Rules for the HRE-454 Enclosure .......................7

Table 4. The Features of the HDU-451 Front Panel ..............................9

Table 5. HLU-451 Status Menu Messages ..........................................14

Table 6. Terminal Navigational Keys ..................................................19

Table 7. Main Menu Options ...............................................................20

Table 8. Span Status Screen Fields ......................................................22

Table 9. System Settings Screen Fields ...............................................24

Table 10. Alarm History Fields ...........................................................29

150-451-142-04, Revision 04 Product Overview

HDU-451 List 4B October 8, 1998 1

PRODUCT OVERVIEW

PairGain’s HiGain Model HDU-451 List 4B low power Doubler Unit

(Figure 3 on page 8) extends the range of the HiGain repeaterless T1

transmission system. When installed between a HiGain Line Unit with

doubler-powering capability, and an HRU-412 HiGain Remote Unit, the

HDU-451 enables 1.544Mbps transmissionover an extended Carrier Serving

Area (CSA) range of approximately 24,000 feet of 24 AWG or 18,000 feet of

26 AWG wire. Customers can use two doublers in series to triple the normal

CSA range (36,000 feet on 24 AWG).

The HDU-451mounts in a single slot ofany industry standard 400 mechanics

shelf or in equivalentenclosures manufactured byPairGainTechnologies.All

HiGain modules comply with the applicable requirements of

TR-TSY-000063 (Network Equipment Building System (NEBS) Generic

Equipment requirements) and TR-TSY-000499 (Transport System Generic

Requirements - TSGR).

DESCRIPTION AND FEATURES

HDU-451 List 4B, HiGain Doubler Unit features:

•Powered by the HLU List 6D - no local power required

•Front Panel HDSL Status Display

•Front panel jacks for test access

•Lightning and power cross protection on the HDSL interfaces (both

sides)

•Front Panel Doubler loopback LED indicator

•Low power dissipation

The HDU-451 List 4B unit is compatible with any HiGain Line Unit that

supports doublers.

The HDU-451 List 4B is identical to the List 3B, except that it is compatible

with bothmetallicsealing currents and thesimplexedsealingcurrentsthatare

found in HiGain remote units.

Product Overview 150-451-142-04, Revision 04

2 October 8, 1998 HDU-451 List 4B

In line with PairGain's continuing efforts to provide equipment that fully

complies with new industrystandards, the List 4Bdoubler hasbeen enhanced

with a special ground fault-detecting circuit described in Paragraph R7-1,

Section 7.2.1 of GR-1089-CORE, Issue 1, Revision 1, December, 1996.

When used with HiGain line units, ground faults occurring at any point along

anyspan on any wire areimmediately detected. This condition shuts down the

HiGain circuit. The line unit will periodically try to apply power to the first

span to determine whether the fault condition is still present. As long as the

fault condition exists, the power cycling and ground fault protection

continues.

Circuits containing both the new List B and older doublers also support this

new ground fault detecting feature, provided the doubler nearest the HLU is

a List B unit. The presence of this new circuit causes the HDSL

span-powering voltage levels to beshifted up to 100 volts more positive than

what they are in non-List B doubler circuits. The actual shift depends on loop

length, number of doublers, HRU powering option, and the setting of the

HLUBipolar/UnipolarSwitch.TheList Bdoublersarebackward-compatible

with all versions of HiGain line units.

APPLICATIONS

The primary application of the HDU-451 HiGain Doubler is to extend the

delivery of T1 High Capacity Digital Service (HCDS) to customers over

metallic cable pairs, up to 24,000 or 36,000 feet (24 AWG). A doubler

application is shown in Figure 1 on page 3. A maximum of two HDU-451

units can be used in tandem on the same circuit.

Table 1 on page 3 provides a guide for the loss of various cable gauges at

196 kHz and 135 ohms. The table applies to the HDSL cable pairs between

the HLU and the HDU-451 as well as between the HDU-451 and a second

HDU-451 or the HRU-412. Add 3 dB for each bridged tap and 1 dB for each

cable gauge change.

The operation of the ground fault circuit requires that the

doubler enclosure be connected to earth ground.

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