Front Panel LTPH-UM-1049-02, Issue 2
4 January 9, 2002 H2TU-C-319 List 4E
Table 1. Front-Panel Description
Front-Panel Feature Function
Front-panel display Displays four-character status, provisioning, and alarm system messages. The front-panel displ ay
illuminates when power is initially applied. To conserve power the display only remains on for
5minut es. Using the MODE or LBK pushbuttons reactivates the display and restarts the 5-minute
timer. Refer to Table2 on pa ge 5 for a listing of the four-character messages.
MODE and LBK system
option pushbuttons Permits user options to be mon itored and modified without the need of a main tenance terminal. Used
to initiate all HiGain loopbacks and test states as well as to display DSX-1 line parame ters and line
unit identity.
Status LED The status LED can report the following conditions:
Off Line power is off.
Green Normal operation.
Flashing green HDSL2 acquisition.
Red Fuse alarm.
Flashing red System alarm.
Yellow An H2TU-C Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC) is in effect.
Flashing yellow H2TU-C is in an Armed state.
DSX-1 access jacks
BRG Provides non-intrusive bridging jack access to (IN) and from (OUT) the HDSL2 span at the
MUX DSX-1 interface. Allows the two DS1 payloads to be monitored.
LINE Provides splitting jack access to (IN) and from (OUT) the HDSL2 span at the MUX DSX-1 interface.
Breaks the IN and OUT paths to permit test signal insertion and retrieval.
Craft port (RS-232) Provides bidirectional communication between the unit and an externa l terminal to allow
configuration and performance monitoring through the maintenance terminal screens.
CLEI and ECI bar code label Provides the human-readable Comm on Language Equipment Identifier (CLEI) code number and the
Equipment Catalog Item (ECI) bar code number.
List number Identifies the list number of the H2TU-C.