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)

 

 

 

 

 

 

 

LBK

SW1-5

Manual Code Select

Selects alternate mark inversion or binary 8 zero substitution codes.

 

 

 

 

 

 

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.

1If 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

Page 1
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ADTRAN HTU-C M, HTU-R quick start Practices, Htu-C M, SW1

HTU-C M, HTU-R specifications

ADTRAN HTU-C M and HTU-R are components integral to the digital subscriber line (DSL) technology that facilitates high-speed internet access over copper telephone lines. These devices are commonly used in deploying VDSL2 and ADSL2+ services, providing a reliable solution for connecting residential and business customers to broadband networks.

The HTU-C M, or High-Level Transceiver Unit - Central, serves as the DSL modem located at the service provider’s end. Its primary function is to convert the digital signals from the central office into formats compatible with the existing copper infrastructure. The unit supports various DSL protocols, including VDSL2 and ADSL2+, ensuring compatibility with a wide array of network configurations.

One of its standout features is its advanced spectral management capabilities. The HTU-C M employs sophisticated techniques to optimize signal transmission over different frequency bands, enhancing performance while mitigating interference. Additionally, it is equipped with power management options, allowing it to adjust its power consumption based on the network demand, which contributes to overall operational efficiency.

On the other hand, the HTU-R, or High-Level Transceiver Unit - Remote, operates at the customer premises and is responsible for the reception of data coming from the HTU-C M. This device converts the digital signals back into a format usable by end-user devices, such as routers and computers.

The HTU-R offers robust features, including support for multiple user data interfaces, making it versatile for various home or business setups. Its versatility extends to compatibility with several DSL standards, ensuring support for future upgrades and technologies.

Both units are designed with a focus on reliability and performance. They incorporate error correction technologies, such as Reed-Solomon coding, which helps maintain a stable connection by correcting transmission errors. This characteristic is particularly valuable in areas where the copper infrastructure may be subject to interference, ensuring consistent data rates and reduced latency.

In summary, the ADTRAN HTU-C M and HTU-R are pivotal elements in the delivery of high-speed DSL services. Their advanced features and technologies, such as spectral management and error correction, make them reliable choices for service providers looking to enhance their broadband offerings while ensuring customer satisfaction. With their versatility and robust performance, they play a crucial role in the ever-evolving landscape of digital communication.