A.The PM_BIP8_SD alarm indicates the PM segment signal degradation alarm in the OTU layer.

B.The PM_BIP8_DEG alarm indicates the PM segment signal degradation alarm in the ODU layer.

C.The PM_BIP8_OVER alarm indicates that PM error amount has exceeded in the ODU layer.

A.For the inbound port of the Tag Aware attribute, if the input data carries the VLAN ID, transparently receive the data.

B.For the ingress port of the Tag Aware attribute, if the input data does not carry the VLAN ID, discard.

C.For the ingress port of the Access attribute, if the input data does not carry the VLAN ID, it is directly transparent.

D.For the ingress port for the Access attribute, if the input data carries the VLAN ID, discard.

A.In order to extend the life of the laser of the board

B.To avoid nonlinear effects

C.In order to protect the cable

D.In order to maintain the personal safety of personnel

A.TPS

B.PW APS

C.Tunnel APS

D.LAG

A.The SCC board at the downstream site of the fault reports the alarm to the power detection unit (OA) of the first node through DCN communication, and reports the alarm to the SOM on the SC of the first node.

B.The downstream power detection unit (OA) detects that the line attenuation deviation exceeds the threshold and reports the alarm to its own SCC board.

C.According to the user adjustment command, adjust the line attenuation of the OCh path to make the downstream light output reach the normal value.

D.After receiving the alarm, the SOM obtains the OCh path corresponding to the alarm and adds it to the management path to be optimized.