Description; Features - ADTRAN HTU-C NB Installation And Maintenance Practice

HTU-C using Narrowband/Wideband for Litespan Installation and Maintenance Practice

DESCRIPTION

The HTU-C NB/WB for Litespan is a DS1 interface unit that provides full T1 service over 4-wire
interface facilities. The HTU-C NB/WB for Litespan combines ADTRAN HDSL technology and
Alcatel-Lucent Litespan technology to provide an HDSL interface to a Litespan system.
The HTU-C NB/WB for Litespan is certified by Alcatel-Lucent to safely operate in Litespan
2000 and Starspan systems. The unit is licensed under the Asynchronous High-bit-rate
Digital Subscriber Line TI Interface Unit (AHT1U) channel unit type.

Features

• RS-232 maintenance port
• Lightning and power cross-protection, static discharge immunity, and local power bus
fusing for line card safety and protection
• 784 kbps dual duplex 2B1Q HDSL transmission over two wire pairs
• Front panel status LEDs
• Performance monitoring and alarm reporting
• Low power consumption
• –137 volt span powering capability of up to 1 HRE and 1 HTU-R
• Corrosion-preventive sealing current over both twisted copper pairs
• Troubleshooting functionality
Asynchronous counterparts to the HTU-C NB/WB for Litespan are the asynchronous DSX-1
interface unit (ADS1U) and the asynchronous T1 interface unit (AT1U). ADTRAN provides the
HTU-C NB/WB for Litespan for connection to narrowband and wideband service pairs. The
List 1 provides the most flexibility for installations where the narrowband/wideband service
connection is not known. It also provides flexibility of switching between narrowband and
wideband services without needing a different HTU-C.
If the List 1 is used in applications where narrowband and
wideband copper service wire pairs are connected simultaneously,
only one service pair may have terminating equipment connected
to the HTU-C NB/WB for Litespan. Also, copper service wire pairs
not in use are considered as bridge taps to the HDSL loops in
service and should be entered into the deployment calculations
listed in
taps presented by the unused loop violates the CSA guidelines, the
unused pair should be disconnected.
Each ADTRAN HTU-C NB/WB for Litespan provides a 1.544 Mbps data transport over two
unconditioned CSA copper pairs that are in accordance with TA-NWT-001210. These CSA
loops can range up to 12 kft of 24-AWG twisted pair wire. All comply with Bellcore GR1089-
CORE, UL1459, FCC Class A subpart J, and Alcatel-Lucent requirements for a generic
subscriber interface unit.
2
CAUTION
"HDSL Deployment Guidelines" on page 27. If the bridged
61247002L1-5A