In SDH, what is the name of the embedded Data Communication Channel (DCC) in bytes D1-D3?()
- A、 the DCC-E
- B、 the DCC-M
- C、 the DCC-R
- D、 the Line DCC
- E、 the Section DCC
正确答案:C
答案解析:有
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In SDH, what is the name of the embedded Data Communication Channel (DCC) in bytes D1-D3?()
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