Alcatel-Lucent 1643 AMS - STM-4 Loss of input signal

STM-4 Loss of input signal
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Alarm identifier STM4cLOS
Information The power level of the received signal is below a defined level and LOF is
detected.
Alarm category Transmission
ASAP sdhPRS
Alarm severity
(default setting)
Prompt
Reporting state
(default setting)
Reported
Local indications
• The red fault LED is flashing.
• In the upstream direction, MS-RDI is inserted.
• In the assembly direction VC-4 path, AIS is inserted.
Cause Possible causes are:
• Cable rupture.
• Dirty optical connector(s).
• Equipment fault(s) in the upstream far-end station of the network element
that reported the alarm.
Actions Check operation of the transmitter in the far-end station.
Check for cable breaks or dirty connectors.
Note(s) In the upstream direction, “MS - 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
1-187