| 摘要 |
PHD 92084 25-05-1993 : Synchronous transmission system. The invention relates to a synchronous transmission system comprising a circuit arrangement for determining the data bytes of a signal to be received or to be transmitted. The circuit arrangement comprises a control circuit (2, 14) which includes at least a counter (11, 19) for marking the pointer bytes of each high bit rate transport unit that can occur and which circuit arrangement includes at least a counter (6, 17) for marking with a count the data bytes of each high bit rate transport unit that can occur. The control circuit (2, 14) further includes for each group of low bit rate transport units that can occur in each maximum bit rate transport unit that can occur at least a position counter (6, 17), which counter is provided for marking with a count the data bytes in a low bit rate transport unit of the group. The control circuit (2, 14) is additionally provided at least for identifying the payload bytes and the pointer bytes on the basis of the counts and the information about the transport units of the signal. Fig. 11.
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