Alcatel-Lucent 1643 AMS Operation Manual page 208

Alarm messages
STM-4 MS Alarm indication signal received
...................................................................................................................................................................................................................................
Alarm identifier
Information
Alarm category
ASAP
Alarm severity
(default setting)
Reporting state
(default setting)
Local indications
Cause
Actions
Note(s)
...................................................................................................................................................................................................................................
1-188
MS4cAIS
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.
Transmission
sdhMS
Information
Reported
In the upstream direction, "Multiplex Section - Remote Defect Indicator"
(MS-RDI) is inserted.
In the upstream equipment a defect has been detected, and as a consequent
action, AIS has been inserted in the downstream direction.
Locally no actions need to be taken. Analyze the alarm state of the upstream
equipment and take appropriate measures.
There are no actions needed concerning the indicated network element; alarm
indication signal is only reported for information.
Alcatel-Lucent - Proprietary
See notice on first page
365-312-803R7.2
Issue 4, May 2007