Cordless telephone system

Details Cordless telephone system Cordless telephone system

1986-05-28

1987-04-28

Lev, Robert G.

Telephonic communications

Audio message storage, retrieval, or synthesis

379 63, 379 56, H04Q 704

Patent

active

046619704

ABSTRACT:
A cordless telephone system includes a plurality of radiophones, each having a first transmitter and a first receiver of different transmission and reception frequencies; and a radio station, wired to a telephone line. The radio station comprises a second receiver and a second transmitter, each having the same reception and transmission frequencies as those of the radiophones; switching means for connecting an input terminal of the second transmitter and an output terminal of the second receiver to the telephone line, or for connecting the input terminal of the second transmitter and the output terminal of the second receiver; and control means for receiving a control signal from the second receiver and supplying a control signal to the switching means. Half duplex communication can be performed between the radiophones.

REFERENCES:
patent: 3014326 (1971-10-01), Cameron
patent: 4012596 (1977-03-01), West, Jr. et al.
patent: 4087636 (1978-05-01), Akiyama et al.
patent: 4291197 (1981-09-01), Yonaga
patent: 4400585 (1983-08-01), Kaman et al.
patent: 4424514 (1984-01-01), Fennell et al.

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