EPL service was configured b/w two sites using L4G board
Site-A reports R-LOF alarm ,
Site-B reports ODU5G_PS_AIS,OTU5G_LOF,Link Error
Parameter of EPL service was checked on both sites and found services configuration is same on both sites. Optical power from Site-A........Site-B is check and found normal.
Then trouble shoot the parameter of L4G board on both sites and found that on Site-A L4G board service mode is set to SDH and at Site-B board service mode is set to OTN.
So both sites has different Service mode, it must be same on both sites, SDH or OTN on both Sites.
Changing the service mode of L4G board at Site-A, SDH to OTN problem was resolved b/w two sites.
Attached snap shots for reference.
Both Sites L4G boards reports alarms mention above, so services were not working normally.
Internal Fiber was checked and found normal. Optical power is normal b/w Two NE’s different section.
Service Mode of L4G board is set to SDH or OTN, both sites contain same service mode.