... /OTN Test ModuleOTM2500 series SDH/SONET/OTN test module could supply complete metro test functionalities with highly ... G.709 framesRound-trip delay measurementsIndependent transmitter and receiver testingOTN alarm generation and monitoringOTN overhead manipulation and ... PM, TCM1-6), Bit,FECcorrectable bit, FECcorrectable code word, FECuncorrectable code wordAlarm generationOTU:LOF,OOF ,LOM, OOM,AIS,SM ...