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Corporate Office:
14402 Franklin Avenue
Tustin, CA 92780
Tel: 714.832.9922
FAX: 714.832.9924

For Technical Assistance: 
800.638.0031

Product Number: 150-1141-51 

HLU-388

List 5A Line Unit

Quick

Installation Guide

H G

I

AIN

5A

FCC Class A Compliance

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.

Limited Warranty

PairGain Technologies warrants this product to be free of defects and to be fully functional for a period of 
60 months from the date of original shipment, given correct customer installation and regular maintenance. 
PairGain will repair or replace at PairGain’s option any unit without cost during this period if the unit is found 
to be defective for any reason other than abuse or incorrect use or installation.

Do not try to repair the unit. If it fails, replace it with another unit and return the faulty unit to PairGain for 
repair. Any modifications of the unit by anyone other than an authorized PairGain representative voids the 
warranty.

If a unit needs repair, call PairGain for a Return Material Authorization (RMA) number and return the defective 
unit, freight prepaid, along with a brief description of the problem.

PairGain continues to repair faulty modules beyond the warranty program at a nominal charge. Contact your 
PairGain sales representative for details and pricing.

Modifications

Any changes or modifications made to this device that are not expressly approved by PairGain Technologies, 
Inc. may void the user's warranty.

All wiring external to the products should follow the provisions of the current edition of the National Electrical 
Code.

Standards Compliance

The HLU-388 List 5A has been tested and verified to comply with the applicable sections of the following 
standards.

GR 63-CORE - Network Equipment-Building System (NEBS) Requirements: Physical Protection

GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety

Trademark Information

PairGain and HiGain are registered trademarks of PairGain Technologies, Inc. All other product names 
mentioned in this installation guide are used for identification purposes only and may be trademarks or 
registered trademarks of their respective companies.

Copyright Information

© Copyright 1999 PairGain Technologies, Inc.

Information contained in this document is company private to PairGain Technologies, Inc., and shall not be 
modified, used, copied, reproduced or disclosed in whole or in part without the written consent of PairGain.

T

HE

 HLU-388 L

IST

 5A

The Pa

irGain

®

 HiGain

®

 Line Un

it HLU-388 

List 5A

 is

 the 

Central Office 

(CO) sid

of a repeat

erless

, T

1 t

ransm

issi

on sy

stem.

 Wh

en u

sed

 in

 co

nju

nct

io

n with

 a HiGai

Remo

te Uni

t (

HR

U),

 th

e syst

em pro

vid

es 1.54

4 Mbps

 tr

ansmi

ssi

on on

 tw

un

co

nditio

ned

 co

pp

er p

air

s over

 the 

full Ca

rrie

r Se

rvice

 Area (CSA) 

ran

ge.

 The C

SA 

incl

udes

 loo

ps up

 to 1

2,0

00

 fee

t of

 24

 (A

mer

ica

n Wir

e G

aug

e) A

WG

 or 9,

000 f

eet

 of 

26

 AWG wire

, in

clu

din

g brid

ged

 tap

s. Th

is line u

nit 

can

 be 

used

 in 

ap

plic

ati

on

s with

 

or withou

t HiGain Doub

ler Unit

s (HDUs).

F

EATUR

ES

S

PE

CIFIC

ATIONS

Fron

t pa

nel s

tat

us LED

, f

ou

r-cha

racte

r st

atus

 

disp

lay

Pay

loa

d (P

L) or

 HiGa

in

 (H

G) l

oop

bac

k s

our

ce 

iden

tifica

tio

n

Ultr

a-lo

w wand

er

Reduc

ed p

owe

r co

nsum

ptio

n

Five

-span

 ra

ng

e wit

h f

our dou

bler

(60 kf

t, 24 AWG

)

Lo

w line-po

wer op

tion

 (-140

 Vdc) f

or c

ircu

its

 

wit

h a

 singl

e d

ouble

r

Sel

ect

able

 pow

er 

fee

d mod

es

Bit E

rror R

ate

 (BER

) a

larm

 op

tion

s

Lo

ss of

 S

ign

al (LO

S)/

Alarm

 Indi

cato

r Sig

nal

 

(AIS

) payl

oad a

lar

m opt

io

n

Bipola

r Violation Tr

an

sp

are

ncy

 (BPVT) 

opti

ons

Ad

diti

onal

 scre

ens fo

r in

vent

ory a

nd

 

trou

bles

hooti

ng

Grou

nded l

oop d

ete

cti

on

Op

erat

in

g T

em

pe

rat

ure

-40 °

F t

o 14

9 °F (-40

 °C

 to

 +6

5°C)

Ope

ra

tin

g Hu

midit

y

5%

 to

 9

5% no

n-cond

ensi

ng

HD

SL Span

 Vo

ltage

-140 or

 ±

112 Vdc

Mou

nti

ng

DD

M+ hi

gh-den

sit

y shel

f

HD

SL Li

ne Code

784 kb

ps 2

B1Q

HD

SL Ou

tp

ut

+13.

5 dBm ±0.

5 dB, 135

 

Maxi

mum

 Pro

vis

ion

in

g L

oss

35

 dB at 1

96 kH

z, 1

35 

DS

1 Line R

ate

1.5

44 Mbps

 ±200 

bp

s

DS

1 Line Fo

rmat

Altern

ate M

ark I

nve

rsion (AM

I),

 Bipolar wit

8-Z

ero

 Su

bsti

tutio

n (

B8

ZS

), 

or 

Zer

o B

yte

 Time

 

Slot I

nte

rch

an

ge (Z

BTSI)

DS

1 Fram

e Forma

t

Ext

en

ded

 Supe

rFram

e (

ESF

), Sup

erF

ram

e (SF

), 

or Un

frame

d (

UNFR)

DSX-1

 Puls

e O

utp

ut

6 V 

pk-p

k

, pr

e-eq

ual

ized

 fo

r 0 to

 655

 fee

t o

f AB

AM 

cabl

e

DSX-1

 Inpu

t Lev

el

+1

.5 t

o -

7.5

 d

B DSX

I

NSTALLATI

ON

To e

nsu

re pro

per 

installa

tion

 of th

e HLU-38

8 List 5

A:

1

Lift u

p th

e e

nti

re fro

nt pan

el 

an

d align

 the HLU-38

8 List 5A

 with

 the s

hel

f rail

s.

2

Slide

 th

e u

nit in a

nd

 pre

ss th

e fro

nt pane

l down to s

ecu

re.

P

OWE

R

-

UP

 S

EQUENCE

When

 th

e HLU 

powe

rs up

, th

e fou

r-cha

ract

er d

ispla

y illu

mina

tes a

nd re

po

rts 

status 

messag

es. 

If th

e HLU i

s no

t co

mm

un

icatin

g with 

the n

ext 

span

 de

vic

e, th

e foll

owing 

occu

rs:

1

Alarm 

and 

diagn

ost

ic 

message

s d

ispl

ay

 (see t

he F

ron

t P

ane

l Al

arm Me

ssages a

nd

 

Fron

t P

ane

l Di

agno

stic

 M

ess

ages 

tab

les i

nsi

de),

 foll

ow

ed by

 th

e SE

LF

 TE

ST

 

messag

e.

2

The Sta

tu

s LED 

turns y

ell

ow, ind

ica

ting i

t h

as 

en

tere

d self-te

st 

mo

de.

If th

e HLU i

s co

mmuni

cati

ng

 with

 th

e next

 span

 devi

ce, t

he fol

lo

win

g oc

curs:

1

Th

e Stat

us LE

D f

la

shes

 red

 while

 acqui

ring

 each dev

ice

 in

 th

e syst

em, and

 tu

rns 

a stead

y gre

en wh

en th

e e

nti

re syst

em i

s o

perat

in

g with

out 

any al

arm

s.

2

The fo

ur-ch

aracter d

isp

lay rep

orts marg

in (sig

nal-t

o-n

oise ratio

) readin

gs an

inse

rtion

 loss.

3

If the s

tat

us LED is n

ot s

olid

 green

, the

 displa

y re

ports a

lar

m c

on

ditio

ns (see t

he 

Fron

t Pane

l Alar

m M

essa

ges tab

le in

side)

.

P

ROVI

SION

ING

1

Acc

ess

 th

e M

ain

ten

an

ce T

erm

in

al screens 

by pressi

ng 

 several

 times.

a

Set 

the d

ate

 an

d tim

e (se

lec

t Se

t Cloc

k from

 th

e M

ain

 Men

u). 

b

Set

 th

e circui

t IDs (sel

ect Vi

ew Sy

stem In

ventory).

2

Acce

ss the Sy

stem

s Settin

gs sele

ctio

n on

 the

 Main 

Menu

 to c

han

ge t

he d

efa

ult 

settin

gs of a

ny sy

stem

 pa

ram

ete

rs. 

3

Access t

he Vi

ew Trou

blesh

oo

tin

g screen t

o vi

ew a

 g

raph

ical

 analy

sis

 of any 

po

ten

tial sy

ste

m p

rob

lem

s.

4

Wh

en t

he HL

U is

 succe

ssfully

 in

stal

led

 and p

rov

isi

oned,

 clear S

pan

 S

tat

us, 

Performa

nce

 Da

ta, Perfo

rman

ce Hist

ory

, an

d Alarm Histo

ry

 screen

s to

 en

sure 

accurat

e d

ata

 and al

arm repo

rting.

Conti

nued

SPACE

BAR

Þ

Section Number: 350-388-151-02

December 7, 1999

Содержание HiGain Line Unit HLU-388

Страница 1: ...eaterless T1 transmission system When used in conjunction with a HiGain Remote Unit HRU the system provides 1 544 Mbps transmission on two unconditioned copper pairs over the full Carrier Service Area CSA range The CSA includes loops up to 12 000 feet of 24 American Wire Gauge AWG or 9 000 feet of 26 AWG wire including bridged taps This line unit can be used in applications with or without HiGain ...

Страница 2: ...peaterless T1 transmission system When used in conjunction with a HiGain Remote Unit HRU the system provides 1 544 Mbps transmission on two unconditioned copper pairs over the full Carrier Service Area CSA range The CSA includes loops up to 12 000 feet of 24 American Wire Gauge AWG or 9 000 feet of 26 AWG wire including bridged taps This line unit can be used in applications with or without HiGain...

Страница 3: ...peaterless T1 transmission system When used in conjunction with a HiGain Remote Unit HRU the system provides 1 544 Mbps transmission on two unconditioned copper pairs over the full Carrier Service Area CSA range The CSA includes loops up to 12 000 feet of 24 American Wire Gauge AWG or 9 000 feet of 26 AWG wire including bridged taps This line unit can be used in applications with or without HiGain...

Страница 4: ...over Loop 1 or Loop 2 of Span 1 AnL1 or AnL2 The multiplexers of the two devices on Span n are trying to establish synchronization with each other on Loop 1 or Loop 2 where n is the number of the span BAD RT The HLU is not receiving any response from the HRU DSO NONE no DSO channels blocked BLK some channels blocked FERR Framing bit error occurred at HLU DSX 1 input H1ES or H2ES HDSL Loop 1 or Loo...

Страница 5: ...ver Loop 1 or Loop 2 of Span 1 AnL1 or AnL2 The multiplexers of the two devices on Span n are trying to establish synchronization with each other on Loop 1 or Loop 2 where n is the number of the span BAD RT The HLU is not receiving any response from the HRU DSO NONE no DSO channels blocked BLK some channels blocked FERR Framing bit error occurred at HLU DSX 1 input H1ES or H2ES HDSL Loop 1 or Loop...

Страница 6: ...ver Loop 1 or Loop 2 of Span 1 AnL1 or AnL2 The multiplexers of the two devices on Span n are trying to establish synchronization with each other on Loop 1 or Loop 2 where n is the number of the span BAD RT The HLU is not receiving any response from the HRU DSO NONE no DSO channels blocked BLK some channels blocked FERR Framing bit error occurred at HLU DSX 1 input H1ES or H2ES HDSL Loop 1 or Loop...

Страница 7: ...eaterless T1 transmission system When used in conjunction with a HiGain Remote Unit HRU the system provides 1 544 Mbps transmission on two unconditioned copper pairs over the full Carrier Service Area CSA range The CSA includes loops up to 12 000 feet of 24 American Wire Gauge AWG or 9 000 feet of 26 AWG wire including bridged taps This line unit can be used in applications with or without HiGain ...

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