Overview
350-200-115-02, Issue 2
4
September 25, 1998
HLU-200 List 1E
C
OMPATIBILITY
The HLU-200 List 1E operates as a channel card within a DSC LITESPAN
2000 Channel Bank. The LITESPAN 2000 system consists of a CO bank that
is connected to a remote bank over an OC3 fiber link. Each bank has slots for
56 channel plug-ins. The HLU-200 List 1E is typically installed in the remote
bank where it is used to transmit a T1 payload to a remote HRU over two
unconditioned HDSL cable pairs, with or without doublers. It is the HDSL
equivalent to an AT1U channel card, which is used to transmit a T1 payload
to a remote location over conventional T1 spans.
The HLU-200 List 1E is compatible with software releases 7.1.x and 8.1.x
and above, of the LITESPAN 2000 system. The List 1E is not compatible
with the LITESPAN 2000 Management System and must be maintained,
provisioned, and monitored from its front panel RS-232 Craft port. The
HLU-200 List 2D (AHDSL) line unit provides integrated management and is
compatible with the LITESPAN 2000 TL1-based Network Management
System and the LITECRAFT Management System in Version 8.x.
The HLU-200 List 1E timing is not synchronized to the LITESPAN bank
timing but runs asynchronously with respect to it.
The HLU-200 List 1E can be cross-connected to another HLU-200 or another
asychronous T1 channel unit within its own channel bank or in the distant
channel bank. This is shown in
, where test access at either
the remote or local ends can be accomplished by use of ADS1U and AT1U
line cards. These point-to-point dedicated circuits are initiated by issuing the
standard TL1-based cross-connect commands to the Maintenance and Test
Interface (MTI) card that identifies the HLU-200 List 1E as an AHT1U plug.
