Telecommunications – Radiotelephone system – Including private cordless extension system
Patent
1995-12-27
1998-03-03
Cumming, William
Telecommunications
Radiotelephone system
Including private cordless extension system
455561, 370 951, H04Q 730
Patent
active
057246610
ABSTRACT:
A cordless telephone system includes a subscriber line interface wired to a subscriber line, and cordless terminal connected to the subscriber line interface via a radio communication. The subscriber interface includes only interface conversion means for performing conversion between a wired signal of the subscriber line and a radio signal of the cordless terminal and means for call connection. In the cordless terminal, it is only required to provide the radio interface circuit which can communicate with the radio interface portion of the subscriber line interface, and a telephone function circuit for enabling connection with the subscriber network. Therefore, the telephone system can be established with employing an arbitrary terminal.
REFERENCES:
patent: 4661659 (1987-04-01), Nishimura
patent: 4937852 (1990-06-01), Manzarek
patent: 5010565 (1991-04-01), Nash et al.
patent: 5081668 (1992-01-01), Ito
patent: 5117423 (1992-05-01), Shepherd et al.
patent: 5128981 (1992-07-01), Tsukamoto et al.
patent: 5263078 (1993-11-01), Takahashi et al.
patent: 5327481 (1994-07-01), Horimoto
patent: 5327483 (1994-07-01), Kikuchi
Cumming William
NEC Corporation
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