Vol. VI-B-56 Alcatel-Lucent
Probable Cause
Signal source for this container is not present.
Recommended Actions
Check for other alarms that may indicate a loss of signal or a weak/degraded
signal, such as LOS, OOF or Signal Degrade/Fail BER.
Check to see if alarms are present on the remote-end mux, which may indicate a
both-way cable-related fault. If one way (far-end Tx, local-end Rx), check/
replace the optical transceiver or complete mux card at each end.
Additional Information
LOP is raised when invalid STS-1 pointers are received for 8 consecutive frames
of 8 consecutive enabled NDFs were detected. It indicates loss of synchonization
and/or excessive jitter.
Container x LOM
Loss of Multi-frame (LOM) detected in container x. This is a minor alarm.
Probable Cause
The multi-frame indicator is missing or invalid.
Recommended Actions
Check for other alarms that may indicate receipt of an errored signal, such as
LOS for a weak signal and LOP for loss of sync through excessive jitter.
If all other indicators are OK, replace the DAC 155oM.
Additional Information
Alarm is raised for incorrect H4 value for 8 frames. The correct 4 frame sequence
was not detected for 8 frames.
Container x RDI
Remote degrade/defict indication (RDI) in container x. This is a minor alarm.
Probable Cause
There is a problem with the transmitted signal in this container.
Recommended Actions
Check for other higher-level alarms, such as RDI-in.
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