Radio telephone system

Details Radio telephone system Radio telephone system

1987-10-27

1989-10-17

Ng, Jin F.

Telephonic communications

Audio message storage, retrieval, or synthesis

379 58, 379 63, 455 34, H04M 1100

Patent

active

048752312

ABSTRACT:
A radio telephone system includes a base station connected to a telephone exchanger and a plurality of mobile stations connected to the base station through a radio channel including a control channel and communication channels. The base station includes a transmitter/receiver, a receiver, and a controller. In a stand-by mode, the controller sets a channel of the transmitter/receiver to the control channel to receive a calling signal from each mobile station and sets a channel of the receiver to a given communication channel to monitor vacancy of the communication channels.

REFERENCES:
patent: 4163121 (1979-07-01), Yoshikawa et al.
patent: 4672601 (1987-06-01), Ablay
patent: 4672658 (1987-06-01), Kavehrad et al.
patent: 4682367 (1987-07-01), Childress et al.
patent: 4731812 (1988-03-01), kerberg
patent: 4741019 (1988-04-01), Takahashi

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