The Erbium Doped Fiber Amplifier (EDFA) is a key component of the new-generation optical communication system. Which of the following are the features of the EDFA? (Multiple Choice)
Answer(s): A,B,D
When the transmit end detects that the b6-b8 of the K2 byte is 110, it indicates that the () alarm is reported at the transmit end.
Answer(s): A,B,C
Which of the following statements about U2000 license is incorrect?
Answer(s): B
The PRBS can be used to test whether an SDH service is normal and whether the protection switching function is normal.
Answer(s): A
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