Alarm Option For Digital Loop Carrier (Dlc) Feed; Retiring System Alarms - ADC H4TU-C-231-L1 User Manual

LTPH-UM-1138-02, Issue 2

Alarm Option for Digital Loop Carrier (DLC) Feed

To improve compatibility with the switch-to-protect features used in DLC feeder applications, the H4TU-C-231
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 button 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.
H4TU-C-231 List 1 September 12, 2003
Testing
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