Which of the following statements about the ALC function and configuration principles of the OTN system is correct? (Multiple choice)

Which of the following statements about the ALC function and configuration principles of the OTN system is correct? (Multiple choice)
A . The ALC function can automatically adjust the output optical power of the amplifier whose line attenuation changes. Except for the first station, other stations must be equipped with a power detection unit.
B . It is recommended that the number of network elements in the ALC link is less than 20. Otherwise, ALC adjustment may time out and cause failure.
C . Each ALC link has a unique I
D . ALC nodes can belong to different DCN subnets.
E . The detection and reference unit of the first node cannot use the same optical port of the same board.
F . If there are two cascaded OA boards in the node, only the second OA board is configured as the reference unit in the first node, and there is no power detection unit.
G . The "working mode" of the OA board and RAU1/RAU2 board must be configured as "gain lock". If it is configured in other modes and ALC is configured, ALC is not adjusted.

View Answer

Answer: ACDEF