Which of the statements about the dispersion compensation module is wrong?

The inside of the module is DCF (with dispersion inverse characteristic) pigtail
DCM80 indicates that the module can compensate 80KM dispersion value
Dispersion compensation is a random value, independent of cable length
The system retains proper dispersion, which can effectively avoid the occurrence of four-wave mixing

Answer(s): C

The OptiX OSN 6800 supports centralized crossover and distributed crossover. When both crossovers exist, the system prefers centralized crossover.

Answer(s): B

Which of the following is the implementation principle of the ALC function, which one is wrong?

Compare the deviation between line attenuation and amplifier gain and the way the node gain compensates for offset.
When the line is degraded, first adjust the nominal gain of the optical amplifier unit, and then adjust the attenuation value of the attenuation adjustment unit (VOA) to ensure the power budget of the entire link.
When the line returns to normal, if the nominal gain of the amplifier unit does not match the gain reference value, the amplifier gain is first adjusted back to the reference value, and then the attenuation value of the VOA is adjusted to ensure the power budget of the entire link.
The reference node transmits its output optical power value downstream every 10 seconds, and the detection node transmits the offset value of the amplifier gain and attenuation. Each node transmits the output optical power and the accumulated deviation value to subsequent nodes.

Answer(s): B

Which of the following is the WDM system commissioning work? (multiple choice)

Answer(s): A,B,C,D

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