System of connecting a wire telecommunication and a radio commun

Details System of connecting a wire telecommunication and a radio commun System of connecting a wire telecommunication and a radio commun

1978-11-03

1980-07-15

Brigance, Gerald

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455 31, 455 42, 455 79, H04Q 704

Patent

active

042130093

ABSTRACT:
A portable telephone assembly has a portable assembly and a base assembly each provided with a radio transmitter and receiver. The portable unit is operative to generate first and second frequency signals one of which is interruptable upon dialing. The base unit includes frequency responsive means operable to connect the base unit to a telephone line when both signals have been received and for interrupting and reestablishing the connection during dialing.

REFERENCES:
patent: 3193623 (1965-07-01), Burns et al.
patent: 3198888 (1965-08-01), Lemelson
patent: 3366880 (1968-01-01), Driver
patent: 3449750 (1969-06-01), Sweigert
patent: 3522536 (1970-08-01), Reynolds
patent: 3644681 (1972-02-01), Rice
patent: 3754187 (1973-08-01), Deming
patent: 3971986 (1976-07-01), Hideshima et al.
patent: 4039760 (1977-08-01), Gregory et al.
patent: 4119800 (1978-10-01), Girardi

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