Cordless telephone network

Details Cordless telephone network Cordless telephone network

1989-08-01

1991-05-28

Eisenzopf, Reinhard J.

Telephonic communications

Audio message storage, retrieval, or synthesis

379 61, 379 63, 379 59, 455 32, 455 34, H04M 1100

Patent

active

050200941

ABSTRACT:
A cordless telephone network comprises a base unit (12) that is interconnected into a normal telephone network (19) and a plurality of hand-held cordless telephones (20). Each of the hand-held cordless telephones has a distinctive identification code and the base unit temporarily stores the identification code of the hand-held unit with which it is communicating during a call and will not communicate with other hand-held units having different identification codes during that call. Each of the hand-held units has the ability to scan a plurality of cordless telephone channels for either receiving a call on a channel on which its identification code is transmitted or placing a call on a channel on which a base unit transmits a "free-channel" signal. The hand-held units each have a voice activation/deactivation circuit which allows the hand-held unit to send and receive audio signals only when it has been given permission to do so by a base unit.

REFERENCES:
patent: 4597104 (1986-06-01), Ohki et al.
patent: 4694485 (1987-09-01), Iwase
patent: 4741049 (1988-04-01), DeJager et al.

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