ADTRAN HTU-C M, HTU-R User Manual

PRACTICES

HDSL Quick Start Guide

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

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

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

HTU-C

1245001L2

266

DSX-1

399

LBO

B8ZS

FRM

ESF

NIU LB DIS

LBK TIMEOUT DIS

H

LP1

D
S

LP2

L

DS1

ALM

LBK

HTU-R

1245021L2

Switch Option Settings

133

0

Line Build-Out
Rotary Switch

EXT

533

AMI
UFRM
SF

SW1

EN
EN

TX

E
Q

RX

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.

noitcnuFnoitpircseD

TXE

0

R
S
2
3
2

331
662
993
335

1WS

1-1WStuoemiTkcabpooL

delbanE

delbasiD

2-1WSkcabpooLUIN

delbanE

delbasiD

(arrows indicate default settings)

1

tuo-dliubenillanretxestceleS

elbacMABAfoteef331-0morfhtgneleniL

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

3,2

.)setunim02(delbanesituoemitkcabpool,NEta1-1WShtiW

.delbasidsituoemitkcabpool,SIDta1-1WShtiW

1TlanoitidartotdnopserotmetsysLSDHNARTDAehtsmargorP

.sedocnwod-pooldnapu-pool)UIN(tinuecafretnikrowten

ESF

(YEL)
B8ZS

(YEL)

R
E
M

LP1

LP2

DS1

ALM

SF

(GRN)

AMI

(GRN)

LBK

L
O
C

LBK

TX

RX

MON

3-1WStceleSemarFlaunaM

FS

FSE

4-1WSgnimarF1T

demarfnU

demarF

5-1WStceleSedoClaunaM

IMA

SZ8B

R-UTH

noitcnuFnoitpircseD

MERkcabpooLetomeRC-C M

pressing REM

COLkcabpooLlacoLR-UTHehtfI

pressing REM

1

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

noitcelesemarF

.detcelessitamrofemarfrepus,FSta3-1WShtiW

edomgnimarf1TehtstceleS

.derongisignittes

.detcelessinoitarepodemarf,MRFta4-1WShtiW

is not

in loopback UTHehtfI ssing REM

k towards the customer. If the HTU-C M is in loopback,

cabpool

deactivates

the loopback.

tonsi

k towards the customer. If the HTU-R

deactivates

the loopback.

activates

MERgnisserp,kcabpoolni

is

in loopback,cabpool

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

2

Loopback timeout must be selected prior to initiating a loopback.

3

60 and 120 minutes is selectable from the craft interface.

.detcelessitamrofemarfrepusdednetxe,FSEta-31WShtiW

3-1WS.detcelessinoitarepodemarfnu,MRFUta4-1WShtiW

.sedocnoitutitsbusorez8yranibronoisrevnikrametanretlastceleS

.detcelessinoisrevnikrametanretla,IMAta5-1WShtiW

.detcelessinoitutitsbusorez8yranib,SZ8Bta5-1WShtiW

theerp,

setavitca

eht

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

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

0

12
11
10

9
8
7
6
5
4
3
2
1
0

1234

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

TAP

LENGTH

(KFT)

VALID HDSL CABLE LENGTHS

HDSL DEPLOYMENT GUIDELINES

The ADTRAN HDSL system is designed to provide DS1
based services over loops designed to comply with
Carrier Service Area (CSA) guidelines. CSA deployment
guidelines are given below.

1. All loops are non-loaded only.

2. For loops with 26-AWG cable, the maximum
loop length including bridged tap lengths is 9kft.

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. The total lenght of multi-gauge cable containing
26-AWG cable must not exceed:

12 -{(3*L26)/9} - L

BTAP

(in kft)

L26 = Total length of 26-AWG cable excluding
bridged taps (in kft)

BTAP

L

= Total length of all bridged taps (in kft)

This deployment criteria is summarized in the chart
shown.

Recommended maximum local loop loss information for
PIC cable at 70°F, 135Ω, resistive termination is listed in
the provided table.

When deployment requires the use of two HREs, the
HTU-C M can be deployed with two Low Voltage T400
HREs (1244.041L2) and one Low Voltage HTU-R
(1245.021L1 or 1245.026L1).

An approximation for maximum amount of wideband
nosie on a DSL local loop as measured by a 50kbps filter
is < 31dBrn.

Loop Insertion Loss

)zH(ycneuqerF)Bd(ssoLmumixaM

An approximation for maximum amount of impulse noise
on a DSL local loop as measured by a 50kbps filter is < 50dBrn.

These approximations are to be used as
guidelines only and may vary slightly on different
loops. Adhering to the guidelines should produce
performance in excess of 10

-7

BER.

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 [phone]

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

Emergency Support 7 days/week, 24 hours/day

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