STM-4 MS Alarm indication signal received
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Alarm identifier
MS4cAIS
Information
When the Alarm Indication Signal (AIS) is received, then:
•
The STM-4 MS contains all 1s (alarm indication signal).
•
The upstream equipment has detected a defect and responded to it.
Alarm category
Transmission
ASAP
sdhMS
Alarm severity
(default setting)
Information
Reporting state
(default setting)
Reported
Local indications
In the upstream direction, “Multiplex Section - Remote Defect Indicator”
(MS-RDI) is inserted.
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.
Note(s)
There are no actions needed concerning the indicated network element; alarm
indication signal is only reported for information.
Alarm messages
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Alcatel-Lucent - Proprietary
See notice on first page
365-312-803R7.2
Issue 4, May 2007
Summary of Contents for 1643 AM
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