A.FALSE

B.TRUE

A.TRUE

B.FALSE

A.Transmitting laser performance degradation of the originating OTU board

B.The optical power of the incoming fiber is too high or too low

C.Dispersion compensation is unreasonable, such as under- or over-compensation

D.The temperature in the equipment room is too high

E.The tail wire connector is seriously polluted

A.Synchronizing network metadata

B.Configuration data

C.Create a logical fiber

D.Turn on NE performance monitoring time.

A.Check the cabinet and board indicators

B.Check the room temperature, humidity and cleanliness

C.Check device sound alarms

D.Check the fan box and clean the air filter