| 摘要 |
PURPOSE:To reduce the power consumption and to facilitate the control by providing a synchronization acquisition/hold means for independent control channel synchronization and plural demodulation means corresponding to the means so as to apply switching control to each channel. CONSTITUTION:Upon the receipt of a power-on reception acknowledge signal from a master station, a control circuit 115 senses a carrier in the reception standby mode when no call request comes from a communication protocol control circuit of a terminal equipment. When a carrier is sensed, a terminal address of data outputted from delay detection demodulation circuits 15,16 is collated. When the address is coincident with a terminal address of this slave set, after it is confirmed by an output of idle level detection circuits 13,14 of the other control channel, the idle control channel is used and an acknowledge signal in response to the content of the control channel signal is outputted. The master station receiving the acknowledge signal senses the carrier of the communication channel and informs two incoming and outgoing idle communication channels to the slave set and sends a synchronizing pattern to the slave set. |
