A.Main light path performance

B.Type of originating FEC

C.Light performance flatness

D.Receive OTU input optical power

A.ODUkLP-n

B.ClientLP-n

C.n(Nn/OUTn)-OCH:l-ODUk:m-ODUp:q

D.RX/TX-n

A.TRUE

B.FALSE

A.Optical transmission section overhead

B.Optical channel transmission unit overhead

C.Optical channel overhead

D.Optical multiplex section overhead

A.Check device sound alarms

B.Check the fan box and clean the air filter

C.Check the cabinet and board indicators

D.Check the room temperature, humidity and cleanliness