| 摘要 |
PROBLEM TO BE SOLVED: To simplify installation works of signal lines and achieve multi-channelling of voice signals while ensuring speech quality. SOLUTION: A voice transmission system includes: a plurality of terminals for transmitting voice signals via the signal lines Ls; and a master apparatus 1 connected to the terminals 2 by the signal lines Ls and transmitting a synchronizing signal SY for the application of call control between the terminals 2 and specifying time slots TSi (i=1,2,...,n) stated later. Since voice signals and control signals subjected to frequency division multiplexing are transmitted through the signal lines Ls shared in common, the installation works of the signal lines Ls can be simplified. Further, transmission of the voice signals subjected to time division multiplexing can attain the multi-channeled voice signals while ensuring the speech quality. COPYRIGHT: (C)2007,JPO&INPIT
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