Vol. VI-B-54 Alcatel-Lucent
Signal Fail BER
BER exceeded the signal fail threshold (10
-3
). This is a critical alarm.
Probable Cause
Cable integrity, optical transceiver.
Recommended Actions
Check other alarms for an indication of a cable failure, a remote-end mux
malfunction, or local-end transceiver failure.
Additional Information
Alarm is based on B2 of the line overhead.
LOS
Loss of Signal (LOS) alarm detected in the regenerator. This is a critical alarm.
Probable Cause
A cable is disconnected or the pier equipment laser is off.
Recommended Actions
Check presence of other alarms to help determine if the problem is cable or
equipment based.
Check remote-end mux/regenerator operation.
Additional Information
Loss of signal is raised when the signal level drops below the threshold at which
a BER of 1 in 10-3 is predicted. Clears when two consecutive framing patterns
are received and no new LOS condition is detected.
LOF
Loss of Frame (LOF) alarm detected in the regenerator. This is a critical alarm.
Probable Cause
Pier equipment malfunction.
Recommended Actions
Check presence of other alarms to help determine if the problem is cable or
equipment based.
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