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Front Panel
Front-Panel Feature
Front-panel display
List number
MODE and SEL pushbuttons
Status LED
Off
Green
Red
Flashing red
Yellow
Flashing yellow
Card handle
DSX-1 access jacks
BRG
LINE
Craft port (RS-232)
4
Table 1. Front-Panel Description
Function
Displays four-character status, provisioning, and alarm system messages. The front-panel display
illuminates when power is initially applied. To conserve power the display only remains on for
5 minutes. Using the MODE or SEL pushbuttons reactivates the display and restarts the 5-minute
timer. Refer to
Table 2 on page 5
Identifies the list number of the H4TU-C-319.
Permits user options to be monitored and modified without the need of a maintenance terminal.
Used to initiate all HDSL4 loopbacks and to display DSX-1 line parameters and line unit identity.
The status LED can report the following conditions:
Line power is off.
Normal operation.
Fuse alarm.
HDSL4 acquisition or system alarm.
An H4TU-C-319 Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC) is in
effect.
H4TU-C-319 is in an Armed (ARM) state.
Provides the human-readable Common Language Equipment Identifier (CLEI) code number and
the Equipment Catalog Item (ECI) bar code number.
Provides non-intrusive bridging 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 IN and OUT 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.
September 12, 2003
for a listing of the four-character messages.
LTPH-UM-1031-03, Issue 3
H4TU-C-319 List 1
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