| 摘要 |
PURPOSE:To enable the exchange for loud and simultaneous communication, by forming bidirectional communication path independently of the time sharing exchanger. CONSTITUTION:The pulse modulator 1 which is connected to the terminal telephone sets A to N and provides the first time sharing switches Ta to Tn at the output side, is provided, and the first time sharing multiplex line L1 connected to the switches Ta to Tn is provided. Further, the demodulator 2 which is connected to the telephone sets A to N corresponding to the modulator 1 and is connected to the second time sharing switches Ra to Rn switched in synchronizing with the switches Ta to Tn, is connected to the second time sharing multiplex line L2. Thus, each communication line is made bidirectional with the third time sharing switches F1 to F2m-1 and F2 to F2m at incoming and outgoing side connected to the multiplex line L1 and the fourth time sharing switches G1 to G2m-1 and G2 to G2m at the reception and outgoing side connected to the multiplex line L2, and the exchange of loud and simultaneous communication is made possible via the audio switch circuit 7. |
