| 摘要 |
PROBLEM TO BE SOLVED: To suppress a delay fluctuation of a reception station side of the synchronous digital hierarchy(SDH) transmission system sufficiently small. SOLUTION: In the SDH transmission system applying mapping/de-mapping to an ascynchronous signal, a de-mapped ascynchronous signal is once stored in an FIFO memory in an FIFO section 4 at a receiver station side. Then the delay fluctuation of a receiver station side is minimized by reading the stored asynchronous signal one by one frame each in a timing of '125μsec×(received AU pointer/783) + a prescribed time'.
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