Line communication systems incorporating mains electricity condu

Details Line communication systems incorporating mains electricity condu Line communication systems incorporating mains electricity condu

1995-11-22

1998-04-28

Bost, Dwayne

Telephonic communications

Audio message storage, retrieval, or synthesis

379 66, 455 331, H04M 1100

Patent

active

057455520

ABSTRACT:
A line communication system for linking a plurality of telephone subscribers to a public telephone exchange, wherein the subscribers are each located within the same general area, and wherein each subscriber is fed from the same mains electricity sub-station with mains electricity is provided. The line communication system provides subscriber apparatus which includes a cordless telephone (CT) handset and a frequency convertor for each subscriber. The handset is hard-wired to the mains electricity supply conductors via the frequency convertor so that CT signals at UHF are down-converted to HF for transmission through the mains electricity conductors. A CT base station is connected to the public telephone exchange. The CT base station is connected to the mains electricity supply conductors via a further frequency convertor for HF line communication purposes. A control matrix is provided in operative association with the base station, which serves to associate an address (corresponding to a telephone number) for each subscriber as recognized by the public telephone exchange with corresponding channels assigned by the CT protocol to each subscriber. Thus, the public telephone exchange and the subscribers are placed in mutual two-way communication and that calls are correctly routed and billed.

REFERENCES:
patent: 5051720 (1991-09-01), Kittirutsunetorn
patent: 5066939 (1991-11-01), Mansfield, Jr.
patent: 5067817 (1991-11-01), Glenn
patent: 5623531 (1997-04-01), Nilssen

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