ADC HDSL4, H4TU-C-319 List 1 Line Unit Alarm Option for DLC Feed, Retiring System Alarms

Testing LTPH-UM-1031-03, Issue 3

Alarm Option for DLC Feed

To improve HDSL4 compatibility with the switch-to-protect features used in DLC feeder applications, the H4TU-C-319 has an Alarm Pattern (ALMP) option that allows you to select either an AIS or LOS DS1 output payload for the following alarms:

•LOSW on any loop

•LOS DS1

Retiring System Alarms

To retire a system alarm, press the SEL pushbutton to execute an Alarm Cutoff (ACO). An ACO turns the alarm off and replaces the ALRM message with an ACO message. The second part of the ALRM message, which defines the cause of the alarm, remains. Both parts of the message remain until the alarm condition clears or another higher priority alarm occurs.

44 September 12, 2003 H4TU-C-319 List 1