A.The tail wire connector is seriously polluted

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

C.The temperature in the equipment room is too high

D.Transmitting laser performance degradation of the originating OTU board

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

A.2 Mbit/s

B.576 kbit/s

C.64 kbit/s

D.192 kbit/s

A.Intra-office mode

B.Automatic mode

C.Manual mode

D.Near-end mode

A.ODUkT calculates BIP-8 and writes to TCHi.

B.OTUk is responsible for calculating BIP-8, writing to SM, GCCO, FAS, MAFS, etc.

C.ODUkP is responsible for calculating BIP-8, writing PM, GCC1/2 and other overheads.

D.OPUk performs client signal mapping, rate adjustment and rate adaptation in the transmission direction.

A.WDM_OTM

B.WDM_OLA

C.WDM OADM

D.WDM_OEQ