Alcatel-Lucent 1643 AMS Operation Manual page 298

Alarm messages
VC-3 Virtual concatenated Loss of multiframe
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Alarm identifier
Information
Alarm category
ASAP
Alarm severity
(default setting)
Reporting state
(default setting)
Local indications
Cause
Actions
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1-278
VC3VcLOM
The receiver of the corresponding Ethernet port has detected an unexpected,
unsequential pattern in either the multiframe 1 (MF1) or multiframe 2 (MF2)
of at least one VC-3 in a Virtual Concatenation Group (VCG).
Transmission
sdhVCG
Prompt
Reported
In the reporting Network Element:
•
The red fault LED is lit.
•
In the downstream direction, the alarm indication signal is inserted into the
next function.
Unit failure in the upstream node that generated the H4 multiframe alignment
signal or in the node that reported the alarm.
Check on the management system if unit failure is reported for the unit
generating the multiframe alignment signal.
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 VC-3 Loss of multiframe contains the faulty unit.
Alcatel-Lucent - Proprietary
See notice on first page
365-312-803R7.2
Issue 4, May 2007