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多选题
What are two important considerations when using 2- or 4-channel 15216 OADMs?() (Choose two.)
A

All Add channels require uniform power levels.

B

The flexibility of wavelengths per OADM is limited.

C

It is easier to balance Pass-Through and Add channels.

D

There is lower pass-through loss using multi-channel OADMs.

E

You can extract a single channel without dropping other channels.


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