This section provide information on enhanced RCA cases for Signal Degrade and Transmit Ports.

Correlating aggregate SD (IsSignalDegrade detected) with downstream LOS, LOF, SD on non-aggregate (Transponder) ports.

SignalDegrade on network path will lead to SD, LOS or LOF on downstream Transponders, depending on severity of bend. Upstream/downstream model is extended to support SD correlated with downstream LOS, LoF or SD.

Transmission port (Output port) level failures in RCA correlation with respect to UpStream/DownStream failures.

OTM can now correlate aggregate TX port alarm (root cause) to downstream aggregate LOS (impacts).