In the non-converged OTU processing SDH standard signal scenario, both A and B are WDM sites. The client side of the OTU at station A detects an RLOS alarm. The client side of the station detects…

In the non-converged OTU processing SDH standard signal scenario, both A and B are WDM sites. The client side of the OTU at station A detects an RLOS alarm. The client side of the station detects and reports the REM_SF alarm, and station B transmits the signal to its downstream client device, and reports the R_LOS alarm to the client device.