ADTRAN HTU-C M Manuel utilisateur

1Section 61245001L2-13, Issue 161245.001L2-13A

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R-UTH

noitcnuFnoitpircseD

MERkcabpooLetomeRC-C M

is not

in loopbackUTHehtfI ssing REM

activates

theerp,

k towards the customer. If the HTU-C M

in loopback,

cabpool

COLkcabpooLlacoLR-UTHehtfI

tonsi

MERgnisserp,kcabpoolni

setavitca

eht

k towards the customer. If the HTU-R

in loopback,cabpool

pressing REM

deactivates

the loopback.

pressing REM

deactivates

the loopback.

Please ensure you are properly grounded before setting any function switches.

HDSL Quick Start Guide

5th Gen HTU-C M, P/N 1245001L2

5th Gen HTU-R, P/N 1245021L1

PRACTICES

Switch Option Settings

(arrows indicate default settings)

HTU-C M

The HTU-C M transfers the local configuration to the HTU-R when circuit synchronization is

achieved. The HTU-R then sets its configuration to match the HTU-C M.

Rotary Switch

Used to select operation of the line build-out equalizer in series with the DSX-1 output.

If external line build-out is selected, the signal transmitted by the HTU-C M is a 12V p-p signal. This must be

considered when measuring the signal at the DSX EQ faceplate Bantam jack. The signal may appear hotter

than it should be.

Loopback timeout must be selected prior to initiating a loopback.

60 and 120 minutes is selectable from the craft interface.

noitcnuFnoitpircseD

TXE

331

662

993

335

tuo-dliubenillanretxestceleS

elbacMABAfoteef331-0morfhtgneleniL elbacMABAfoteef662-331morfhtgneleniL elbacMABAfoteef993-662morfhtgneleniL elbacMABAfoteef335-993morfhtgneleniL elbacMABAfoteef556-335morfhtgneleniL

HTU-R

1245021L2

LP1

LP2

DS1

ALM

AMI

LBK

ESF

B8ZS

MON

MLBK

(GRN)

(YEL)

HTU-C

1245001L2

LP1

LP2

DS1

ALM

LBK

B8ZS

FRM

ESF

NIU LB DIS

LBK TIMEOUT DIS

AMI

UFRM

DSX-1

LBO

533

399

266 133

EXT Line Build-Out

Rotary Switch

SW1

2 Section 61245001L2-13, Issue 1 61245.001L2-13A

ADTRAN PRACTICES 5th Gen HTU-C/HTU-R Quick Start guide

HDSL DEPLOYMENT GUIDELINES

TheADTRANHDSLsystemisdesignedtoprovideDS1

based services over loops designed to comply with

CarrierServiceArea(CSA)guidelines. CSAdeployment

guidelines are given below.

1. All loops are non-loaded only.

2. For loops with 26-AWG cable, the maximum

looplengthincludingbridgedtaplengthsis9kft.

3. For loops with 24-AWG cable, the maximum

loop length including bridged tap lengths is

12kft.

4. Any single bridged tap is limited to 2kft.

5. Total bridged tap length is limited to 2.5kft.

6. Thetotal lenghtofmulti-gaugecable containing

26-AWG cable must not exceed:

12 -{(3*L26)/9} - LBTAP (in kft)

L26 = Total length of 26-AWG cable excluding

bridged taps (in kft)

LBTAP = Total length of all bridged taps (in kft)

This deployment criteria is summarized in the chart

shown.

Recommendedmaximumlocalloop lossinformationfor

PICcableat70°F,135Ω,resistiveterminationislistedin

the provided table.

An approximation for maximum amount of wideband

nosieonaDSLlocalloopasmeasuredbya50kbpsfilter

is < 31dBrn.

Anapproximationformaximumamountofimpulsenoise

onaDSLlocalloopasmeasuredbya50kbpsfilteris<50dBrn.

These approximations are to be used as

guidelinesonlyandmayvaryslightlyondifferent

loops. Adheringtotheguidelinesshouldproduce

performance in excess of 10

-7

BER.

01234

WORKING LENGTH OF 26 GAUGE CABLE (KFT)

WORKING LENGTH OF 24 GAUGE (OR COARSER) CABLE (KFT)

56789

2.5

INVALID HDSL CABLE LENGTHS

2.0 1.5 1.0 0.5 0.0

TOTAL

BRIDGED

TAPLENGTH

(KFT)

VALID HDSL CABLE LENGTHS

Loop Insertion Loss

)zH(ycneuqerF)Bd(ssoLmumixaM

0003

000,01

000,05

000,001

000,051

000,002

0.21

0.51

5.52

0.03

57.23

52.53

ADTRAN Technical Support (800) 726-8663

Standard support hours, Monday-Friday, 7am-7pm CST

Emergency Support 7 days/week, 24 hours/day

When deployment requires the use of two HREs, the

HTU-CMcanbedeployedwithtwoLowVoltageT400

HREs (1244.041L2) and one Low Voltage HTU-R

(1245.021L1 or 1245.026L1).

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