Which of the following statements regarding the sequence of signal flows between the SDH interface and the cross-connecting unit is correct?
Answer(s): A
K1 and K2 bytes can send APS switching signaling or indicate that the multiplexed segment signal is invalid.
Which of the following is the functional unit that provides a high-speed signal interface and processes the corresponding signal?
Answer(s): D
Which of the following is the main advantage of SDH? (Multiple choice).
Answer(s): A,B,C,D
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