In the SDH optical synchronous transmission system, which of the following bytes is used to transmit the quality and usage information of clock sources?
In the SDH optical synchronous transmission system, which of the following bytes is used to transmit the quality and usage information of clock sources?
In the SDH optical synchronous transmission system, which of the following bytes is used to transmit the quality and usage information of clock sources? A . G1 B . S1 C . N1 D . M1
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