| 摘要 |
PURPOSE:To suppress the increase of the number of private channels and to improve the use efficiency of assigned channels by branching an outgoing command from a transmission communication line in a slave station to decode a specific channel and inserting a response signal to a specific channel for response by an inhibiting and inserting circuit provided on a reception communication line with respect to an incoming response. CONSTITUTION:A code modulated signal on the transmission communication line from a master terminal station 1 to a terminal station 2 is branched in a slave station 3, and a specific channel for general call, for example, channel CH1 is decoded by a decoding part 34. When the slave station 3 responds, the response signal is inserted to the position of a specific channel, for example, the channel CH1 of a pulse-code modulated signal on the reception communication line of the master terminal station connected from the terminal station 2 to the master terminal station 1. An inhibiting and inserting circuit 38 is connected on the way of the communication line from the terminal station 2 to the master terminal station 1 which is the reception communication line of the master terminal station. The signal on a specific channel slot, for example, the channel CH1 of the pulse-code modulated signal inputted from the terminal station 2 to the inhibiting and inserting circuit 38 is inhibited and its transmission to the master terminal station 1 is stopped, and the response signal of the slave station 3 is inserted to the same channel CH1 instead.
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