ADTRAN AHT1U User Manual

The ADTRAN Low Voltage Asynchronous Litespan HDSL Transceiver Unit for the central office (HTU-C) is a DS1 interface unit that provides T1 service over four-wire interface facilities. The Low Voltage Litespan HTU-C combine ADTRAN HDSL technology and DSC Litespan technology to provide an HDSL interface to a Litespan system.

ADTRAN’s Low Voltage Litespan HTU-C is Licensed by DSC to safely operate in Litespan 2000 and Starspan systems. The unit is licensed under the Asynchronous High bit-rate Digital Subscriber Line T1 Interface Unit (AHT1U) channel unit type.

The Low Voltage Litespan HTU-C can be used in Litespan 2000, Litespan 2012, and Litespan ONU channel bank assembly systems containing Litespan system software versions of 7.1.3 or higher.

The ADTRAN provides the HTU-C products for narrowband and wideband connections. The Litespan HTU-C is compatible with all ADTRAN HDSL transceivers for remote sites (HTU-R) and the HDSL Range Extension (HRE).

PRODUCT FEATURES

■ RS-232 maintenance port

■ 784 kbps dual duplex 2B1Q

HDSL transmission over two wire pairs

■ Front panel status LEDs

conforming to the appearance and function of typical Litespan line cards

■ Performance monitoring and

alarm reporting

■ Low power consumption

■ –135 volt span powering

capability of the Low Voltage HDSL Range Extender (HRE) and HDSL Transceiver Unit, Remote (HTU-R)

■ Troubleshooting functionality

■ Licensed by the DSC Corporation

■ Supports DSC Litespan software

release 7.1.3 or later

■ Can be used in Litespan 2000,

Litespan 2012, and Litespan ONU channel banks

AHT1U

LOW VOLTAGE ASYNCHRONOUS HTU-C LINE CARD

Product Specifications

LOOP INTERFACE

■

Modulation Type:

2B1Q

■

Mode:

Full duplex, echo cancelling

■

Number of pairs:

Two

■

Bit Rate:

784 kbps per pair

■

Baud Rate:

392 kbps per pair

■

Service Range:

Defined by CSA guidelines

■

Loop Loss:

36 dB maximum @ 200kHz

■

Bridged Taps:

Single Taps <2 kft, total taps

≤ 2.5 kft

■

Performance:

Compliant with Bellcore

TA-NWT-001210

■

HDSL Tx Signal Level:

13.5 dBm

■

Imput Impedance:

135Ω

■

Return Loss:

20 dB (40 kHz to 200 kHz)

DIAGNOSTICS

■ Local loopback (HTU-C)

■ Remote loopback (HTU-R)

■ Troubleshooting screen

MOUNTING

■ Litespan 2000 DBA, Litespan 2012 CBA, or

an ONU CBA

ENVIRONMENT

■

Operating (standard):

–40° to 70°C

■

Storage Temperature:

–40° to 85°C

PHYSICAL

■

Dimensions:

4.42" H, 0.84" W, 10.4" D

■

Weight:

Less than one pound

■

Humidity:

Up to 95% non-condensing

POWER

■

Max Power Dissipation HTU-C and HTU-R:

< 4 watts

■

Span Power:

–135 VDC internally

generated from the –48 VDC

Ordering Information

EQUIPMENT PART #

AHT1U HTU-C for DSC Litespan

AHT1U Narrowband

Wideband Wiring................................1245002L6

Call for individual module information.

Specifications subject to change without notice.

CORPORATE OFFICE

901 Explorer Boulevard

Huntsville, AL 35806

800 9ADTRAN

Local: 256 963-8000

Fax: 256 963-8699

Fax Back: 256 963-8200

http://www.adtran.com

email: info@adtran.com

TELCO TECHNICAL

SUPPORT

800 726-8663

REGIONAL OFFICES

Irvine, CA

800 788-5408

Denver, CO

800 471-8651

Atlanta, GA

800 332-6945

Kansas City, KS

800 471-8649

Philadelphia, PA

800 471-8656

Dallas, TX

800 471-8648

Canada

800 232-6811

ADTRAN is an ISO 9001

registered company.

Printed in U.S.A. on recycled paper

61245.002L6-8A May 1998