Zte ZXMW NR8120A - 3.2 Checking the Ethernet OAM Function

Chapter3FaultLocatingMethods
Figure3-2TDMLoopbackSettingPane
4.Selectaslotnumber,setLoopbackTimeandLoopbackType.
FordetailedinformationoftheloopbacktypessupportedbyTDMports,refertoT able
3-1.
Table3-1LoopbackTypesSupportedbyTDMPorts
PortTypeLoopbackTypeDescription
E1electrical
port
lLoopbackoff
lInnerloopback
lOuterloopback
InnerLoopback:Theloopbacktestisimplementedat
theremoteelectricalport.Thisloopbacktypeisused
tocheckwhethertheE1servicetowardstheremote
serviceboardisnormal.Italsohelpscheckwhether
thecablesconnectedtotheremoteserviceboardare
normal.
OuterLoopback:Theloopbacktestisimplemented
atthelocalelectricalport.Thisloopbacktypeisused
tocheckwhethertheE1serviceenteringthelocal
serviceboardisnormal.Italsohelpscheckwhether
thecablesconnectedtothelocalserviceboardare
normal.
5.ClicktheApplybutton,andverifythattheBERiszero.
3.2CheckingtheEthernetOAMFunction
EthernetOperation,AdministrationandMaintenance(OAM)involvesfaultmanagement
andperformancemanagement.Whenafaultoccursinthenetwork,OAMhelps
maintenancepersonnelrapidlylocatethefaultandndoutthefaultcause.Performance
3-3
SJ-20150804150350-006|2015-09-17(R1.0)ZTEProprietaryandCondential