AU-4 Alarm indication signal received
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Alarm identifier AU4cAIS
Information The receive signal contains AU-4-AIS, i.e. the entire VC-4 payload signal
including the AU-4 pointer has been replaced by an all-ones pattern.
AU-4-AIS indicates that a more severe incoming signal failure has been
detected in one of the network elements in the upstream direction.
Alarm category Transmission
ASAP sdhHOPath
Alarm severity
(default setting)
Information
Reporting state
(default setting)
Reported
Local indications –
Cause In the upstream equipment a defect has been detected, and as a consequent
action, AIS has been inserted in the downstream direction.
Actions Locally no actions need to be taken. Analyze the alarm state of the upstream
equipment and take appropriate measures.
Alarm messages
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Alcatel-Lucent - Proprietary
See notice on first page
365-312-803R7.2
Issue 4, May 2007
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