TU-12 Loss of pointer
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Alarm identifier
TU12cLOP
Information
No valid tributary unit pointer interpretation obtained in received signal.
Alarm category
Transmission
ASAP
sdhLOPath
Alarm severity
(default setting)
Prompt
Reporting state
(default setting)
Reported
Local indications
–
Cause
Unit failure in the upstream node that generated the tributary unit pointer or in
the node that reported the alarm.
Actions
Check on the management system if unit failure is reported for the unit
generating the tributary unit pointer.
In that node, remove the unit and replace it with a new one.
Otherwise (i.e. when no unit failure is reported), loop the STM-1 signal at the
transmitting node and at the receiving node. In this condition, the node
reporting TU-12 Loss of pointer contains the faulty unit.
Note(s)
In the downstream direction, AIS is inserted
In the upstream direction, “VC-12 Remote Defect Indicator” is activated.
Alarm messages
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365-312-803R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
1-207
Summary of Contents for 1643 AM
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