| 摘要 |
<P>PROBLEM TO BE SOLVED: To simplify installation works of signal lines and achieve multi-channelling of voice signals while ensuring speech quality. <P>SOLUTION: A voice transmission system includes: a plurality of terminals 2 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 subjected to frequency division multiplexing are transmitted through the signal lines Ls, the multi-channeled voice signals can be attained while ensuring speech quality. Further, since the control signal for the call control is stored to the time slots TSi similarly to the case with the voice signals and transmitted through the signal lines Ls in common, the installation works of the signal lines Ls can be simplified. <P>COPYRIGHT: (C)2007,JPO&INPIT |
