ADC H2TU-C-319 List 4E Manuel D’Utilisation

Once the H2TU-C is installed, verify that it is operating properly. To do this, monitor the following:

Status LED

Status messages reported by the front-panel display (

 lists the status messages).

If there is no H2TU-R remote unit installed:

Verify that the H2TU-C powers up. The front-panel display illuminates and reports status messages. (See 

 lists the messages.)

Verify that the H2TU-C attempts to communicate with a remote unit (status LED flashes red). Even if a 
remote unit is not present, the following events should occur:

The front-panel display reports various four-character status messages.

The H2TU-C again attempts communication with a remote unit until a remote unit is detected.

If an H2TU-R remote unit has been installed:

Verify that the H2TU-C powers up. (The front-panel display illuminates and reports various status messages.)

Verify that the H2TU-C attempts to communicate with the remote unit (status LED flashes red). One of the 
following occurs:

If the remote unit is successfully identified and the HDSL2 loop synchronizes, the H2TU-C status LED 
lights a steady green. The H2TU-C reports normal margin messages on the front-panel display.

If the remote unit is not identified, the H2TU-C reports four-character status messages. The H2TU-C 
attempts communication again and reports four-character status messages. The H2TU-C repeats this 
cycle until a remote unit is detected.

Verify that a valid DS1 signal has been applied to the H2TU-C and the H2TU-R.

If no DS1 signal is being applied to either the H2TU-C or the H2TU-R inputs, then the appropriate DS1 
alarms (LLOS or RLOS) display on the front panel and the status LED flashes red.

If a valid DS1 signal is being supplied to the H2TU-C and H2TU-R, then DS1 alarm indications should 
be absent and the status LED should be a steady green.