| 摘要 |
PURPOSE:To form desired communication path with a simple circuit, by controlling the switching of the time sharing switch located at each section of the time sharing exchanger through the use of the signal tone data not used during communication. CONSTITUTION:The clock pulse from the clock pulse generating circuit 11 provided in the time sharing exchanger is frequency-divided at the frequency demultiplier 12, and the data performing the subscriber data write-in and readout constituted with the part identifying the state of trunk and representing the station number in synchronization with this pulse is stored in the subscriber data memory unit 13. Further, the signal tone data constituted with the part identifying the usage state of the signal tone and representing the types of signals is stored in the signal tone data memory unit 15 in synchronizing with the clock. Further, the logic circuit 17 inputting the data read out from the unit 13 and the clock, and the logic circuits 18 to 20 inputting the signal tone data not used during the communication read out from the unit 15 and the clock, are provided to control the time sharing switch at transmission and reception side and to form the desired communication path. |
