单选题Which timing mode is appropriate for an SDH NE that is adjacent to an SDH NE Bits-1 timing? ()A DUSB line timingC loop timingD internal timingE through timing

单选题
Which timing mode is appropriate for an SDH NE that is adjacent to an SDH NE Bits-1 timing? ()
A

 DUS

B

 line timing

C

 loop timing

D

 internal timing

E

 through timing


参考解析

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