Radio telephone system control method

Details Radio telephone system control method Radio telephone system control method

1989-11-30

1992-08-18

Dwyer, James L.

Telephonic communications

Audio message storage, retrieval, or synthesis

379 56, 379 58, 379 62, 379 63, H04M 1100

Patent

active

051406284

ABSTRACT:
In a method and apparatus for controlling a radio telephone system, a speech channel is established between the slave radio set of a plurality of radio telephone sets and a radio set of a base unit. An intercom switch for selecting intercom performances is provided for respective radio telephone sets. The slave radio sets of the radio telephone sets are turned OFF when the intercom switch is OFF, and transmitters of the slave radio sets of the radio telephone sets are turned ON. Consequently the connection between a wired telephone channel and the plurality of radio telephone sets can be controlled with a single base unit connected to the wired telephone channel.

REFERENCES:
patent: 4672658 (1987-06-01), Kavehrad et al.
patent: 4706274 (1987-11-01), Baker et al.
patent: 4776001 (1988-10-01), Murata et al.
patent: 4802200 (1989-07-01), Murata et al.
patent: 4882746 (1989-11-01), Shimada
patent: 4897864 (1990-01-01), Murata et al.

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