ADC H4TU-C-231-L1 User Manual page 14

Front Panel
Front-Panel Feature
Front-panel display
MODE and SEL system option
buttons
Status LED
Off
Green
Red
Flashing red
Yellow
Flashing yellow
DSX-1 access jacks
BRG
LINE
Craft port (RS-232)
CLEI and ECI bar code label
List number
Retaining latch
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 buttons reactivates the display and restarts the
5-minute timer. Refer to Table 2 on page 5
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-231 List 1 Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC)
is in effect.
H4TU-C-231 List 1 is in an Armed (ARM) state.
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.
Provides the human-readable Common Language Equipment Identifier (CLEI) code number and
the Equipment Catalog Item (ECI) bar code number.
Identifies the list number of the H4TU-C-231.
Retains the card in the shelf when pulled up and extracts the card from the shelf when pulled
down.
September 12, 2003
LTPH-UM-1138-02, Issue 2
for a listing of the four-character messages.
H4TU-C-231 List 1