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Front Panel
Front-Panel Feature
List number
Front-panel LEDs
DSX-1 access jacks
MON
LINE
DB-9 craft port
(RS-232 DCE connector)
CLEI and ECI bar code label
Retaining latch
4
Table 1. Front-Panel Description
Function
List number identifies the list number of the H4TU-C.
Display HDSL4 and DS1 Line, provisioning, and alarm status through front-panel LEDs. Refer to
Table 2 on page 5
for a listing of the front-panel LEDs and their functions.
Provides non-intrusive monitoring jack access to (IN) and from (OUT) the HDSL4 span at the
DSX-1 interface. Allows the two DS1 payloads to be monitored.
Provides splitting jack access to (IN) and from (OUT) the HDSL4 span at the DSX-1 interface. Breaks
the OUT and IN paths to permit test signal insertion and retrieval.
Provides bidirectional communication between the unit and an external terminal to allow
configuration and performance monitoring through the maintenance terminal screens.
Provides the human-readable Common Language Equipment Identifier (CLEI) code number and the
Equipment Catalog Item (ECI) bar code number.
Retains the H4TU-C when in the upright position and releases the H4TU-C when depressed.
October 15, 2003
LTPH-UM-1253-01
H4TU-C-231 List 5A
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