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HDSL Quick Start Guide

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

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

 

 

PRACTICES

 

 

 

 

 

 

 

 

 

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

HTU-C

 

 

 

 

Switch Option Settings

1 2 4 5 0 0 1 L 2

 

 

 

 

(arrows indicate default settings)

 

 

 

133

 

 

 

 

 

 

 

 

 

 

 

 

 

 

266

 

0 Line Build-Out

HTU-C M

 

 

 

 

399

 

 

 

DSX-1

 

 

EXT

Rotary Switch

 

 

LBO

 

 

 

 

 

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

 

 

533

 

 

 

 

 

B8ZS

 

AMI

 

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

 

 

FRM

 

UFRM

 

 

 

ESF

 

SF

SW1

 

 

 

NIU LB DIS

 

EN

Rotary Switch

 

LBK TIMEOUT DIS

 

EN

 

 

LP1

 

H

 

 

 

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

 

 

D

 

TX

 

LP2

 

S

 

 

 

L E

 

 

 

 

 

 

 

 

 

 

 

 

Function

Description

DS1

 

Q

 

 

 

 

 

 

 

RX

 

 

ALM

 

 

 

 

 

 

EXT

Selects external line build-out 1

LBK

 

 

 

 

 

 

 

 

 

 

 

 

 

0

Line length from 0-133 feet of ABAM cable

 

 

R

 

 

 

 

133

Line length from 133-266 feet of ABAM cable

 

 

S

 

 

 

 

266

Line length from 266-399 feet of ABAM cable

 

 

2

 

 

 

 

 

 

3

 

 

 

 

 

 

2

 

 

 

 

399

Line length from 399-533 feet of ABAM cable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

533

Line length from 533-655 feet of ABAM cable

 

 

 

 

 

 

SW1

 

 

 

 

 

 

 

 

SW1-1

Loopback Timeout

 

 

 

 

 

 

 

 

Enabled

With SW1-1 at EN, loopback timeout is enabled (20 minutes). 2, 3

 

 

 

 

 

 

 

Disabled

With SW1-1 at DIS, loopback timeout is disabled.

 

 

 

 

 

 

SW1-2

NIU Loopback

Programs the ADTRAN HDSL system to respond to traditional T1

H T U - R

 

 

 

 

Enabled

network interface unit (NIU) loop-up and loop-down codes.

1245021L2

 

 

 

Disabled

 

 

 

LP1

 

 

SW1-3

Manual Frame Select

Frame selection

 

 

LP2

 

 

 

SF

With SW1-3 at SF, superframe format is selected.

 

 

 

 

 

ESF

With SW1-3 at ESF, extended superframe format is selected.

 

 

 

 

 

 

 

 

 

DS1

 

 

 

 

 

 

 

ALM

 

 

SW1-4

T1 Framing

Selects the T1 framing mode

 

 

 

 

 

Unframed

With SW1-4 at UFRM, unframed operation is selected. SW1-3

(YEL)

 

(GRN)

 

 

 

 

 

 

 

 

setting is ignored.

ESF

 

SF

 

 

 

 

 

 

B8ZS

 

AMI

 

 

 

Framed

With SW1-4 at FRM, framed operation is selected.

(YEL)

 

(GRN)

 

 

SW1-5

Manual Code Select

Selects alternate mark inversion or binary 8 zero substitution codes.

 

 

LBK

 

 

 

 

 

 

 

 

 

R

 

 

L

 

 

 

AMI

With SW1-5 at AMI, alternate mark inversion is selected.

 

 

 

 

 

B8ZS

With SW1-5 at B8ZS, binary 8 zero substitution is selected.

E

 

 

O

 

 

 

M

LBK

C

 

 

 

 

 

 

 

 

 

 

 

 

TX

 

 

 

 

 

 

 

RX

 

 

 

 

HTU-R

 

 

 

 

 

 

 

 

 

 

 

MON

 

 

 

 

Function

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

REM

Remote Loopback

If the HTU-C M is not in loopback, pressing REM activates the

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

pressing REM deactivates the loopback.

LOC

Local Loopback

If the HTU-R is not in loopback, pressing REM activates the

 

 

loopback towards the customer. If the HTU-R is in loopback,

 

 

pressing REM deactivates the loopback.

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

2Loopback timeout must be selected prior to initiating a loopback.

360 and 120 minutes is selectable from the craft interface.

61245.001L2-13A

Section 61245001L2-13, Issue 1

 

1

ADTRAN PRACTICES

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

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} - 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.

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

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

An approximation for maximum amount of impulse noise onaDSLlocalloopasmeasuredbya50kbpsfilteris<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.

 

12

 

 

 

 

 

 

 

 

 

(KFT)

11

 

INVALID HDSL CABLE LENGTHS

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

CABLE

 

 

 

 

 

 

 

 

 

9

 

 

 

 

TOTAL

 

 

 

 

 

 

 

 

BRIDGED

 

 

COARSER)

 

 

 

 

 

 

 

 

 

 

2.5

 

 

 

 

 

 

 

TAP

 

 

8

 

 

 

2.0

 

 

 

 

 

 

1.5

 

LENGTH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.0

0.5

(KFT)

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

0.0

 

 

(OR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAUGE

6

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

OF 24

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

LENGTH

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WORKING

2

 

 

 

 

 

 

 

 

 

 

VALID HDSL CABLE LENGTHS

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

0

1

2

3

4

5

6

7

8

9

WORKING LENGTH OF 26 GAUGE CABLE (KFT)

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).

Loop Insertion Loss

Frequency (Hz)

Maximum Loss (dB)

3000

12.0

10,000

15.0

50,000

25.5

100,000

30.0

150,000

32.75

200,000

35.25

ADTRAN Technical Support (800) 726-8663 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