ITU-T G.697 (06 2004) (英) Optical monitoring for DWDM systems

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1、INTERNATIONALTELECOMMUNICATIONUNIONITU-TG.697TELECOMMUNICATION(06/2004)STANDARDIZATIONSECTOROFITUSERIESG:TRANSMISSIONSYSTEMSANDMEDIA,DIGITALSYSTEMSANDNETWORKSTransmissionmediacharacteristics–CharacteristicsofopticalcomponentsandsubsystemsOpticalmonitoringforDWDMsystemsITU-TRecommendati

2、onG.697ITU-TG-SERIESRECOMMENDATIONSTRANSMISSIONSYSTEMSANDMEDIA,DIGITALSYSTEMSANDNETWORKSINTERNATIONALTELEPHONECONNECTIONSANDCIRCUITSG.100–G.199GENERALCHARACTERISTICSCOMMONTOALLANALOGUECARRIER-G.200–G.299TRANSMISSIONSYSTEMSINDIVIDUALCHARACTERISTICSOFINTERNATIONALCARRIERTELEPHONEG.300–G.

3、399SYSTEMSONMETALLICLINESGENERALCHARACTERISTICSOFINTERNATIONALCARRIERTELEPHONEG.400–G.449SYSTEMSONRADIO-RELAYORSATELLITELINKSANDINTERCONNECTIONWITHMETALLICLINESCOORDINATIONOFRADIOTELEPHONYANDLINETELEPHONYG.450–G.499RadiotelephonecircuitsG.450–G.469LinkswithmobilestationsG.470–G.499TEST

4、INGEQUIPMENTSG.500–G.599TRANSMISSIONMEDIACHARACTERISTICSG.600–G.699GeneralG.600–G.609SymmetriccablepairsG.610–G.619LandcoaxialcablepairsG.620–G.629SubmarinecablesG.630–G.649OpticalfibrecablesG.650–G.659CharacteristicsofopticalcomponentsandsubsystemsG.660–G.699DIGITALTERMINALEQUIPMENTSG

5、.700–G.799DIGITALNETWORKSG.800–G.899DIGITALSECTIONSANDDIGITALLINESYSTEMG.900–G.999QUALITYOFSERVICEANDPERFORMANCE-GENERICANDUSER-RELATEDG.1000–G.1999ASPECTSTRANSMISSIONMEDIACHARACTERISTICSG.6000–G.6999DIGITALTERMINALEQUIPMENTSG.7000–G.7999DIGITALNETWORKSG.8000–G.8999Forfurtherdetails,pl

6、easerefertothelistofITU-TRecommendations.ITU-TRecommendationG.697OpticalmonitoringforDWDMsystemsSummaryThisRecommendationdefinesOpticalMonitoring(OM)thatcanhelpinDWDMsystemstoperformthefollowingactivities:–Configurationmanagementforsystemandchannelactivation,additionofnewchannels,etc.;

7、–Faultmanagementtodetectandtoisolatefaults;–Degradationmanagementinordertokeepthesystemrunningandtodetectdegradationsbeforeafaultoccurs.DWDMtechnologyisimprovingatarapidpace,continuouslystretchingthechannelcount,channelspeedsandreachlimits.Longhaulmulti-spanDWDMsystemsarecapableoftak