ADC H2TU-C-231 12

Front PanelLTPH-UM-1109-01, Issue 1

	Table 1. Front-Panel Description

Front-Panel Feature	Function

Front-panel display	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 for a listing of the four-character messages.

MODE and SEL pushbuttons	Permits the user options to be monitored and modified without the need of a maintenance
	terminal. Used to initiate all loopbacks and to display DSX-1 line parameters and line unit identity.

Status LED	The status LED can report the following conditions:
Off	Line power is off.
Green	Normal operation.
Red	Fuse alarm.
Flashing red	HDSL2 acquisition or system alarm.
Yellow	An H2TU-C-231 Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC) is in
	effect.
Flashing yellow	H2TU-C-231 is in an Armed (ARM) state.

DSX-1 access jacks
BRG	Provides non-intrusive bridging jack access to (IN) and from (OUT) the HDSL2 span at the 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 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 external terminal to allow configuration and performance monitoring through the maintenance terminal screens.

CLEI and ECI bar code label	Provides the human-readable Common 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-231.

Retaining latch	Retains the card in the shelf when pulled up and extracts the card from the shelf when pulled
	down.

January 9, 2002

H2TU-C-231 List 2