Public cordless telephone

Details Public cordless telephone Public cordless telephone

1989-07-05

1990-08-28

Ng, Jin F.

Telephonic communications

Audio message storage, retrieval, or synthesis

379 63, 455 32, 455 34, H04M 1100

Patent

active

049531980

ABSTRACT:
A cordless telephone employed in a public telephone system provides mobility and service at reasonable cost to users of portable communications equipment. The system includes a plurality of base units which are accessible by a plurality of similarly configured cordless telephones. Each one of these base units is assigned and operates on one of multiple frequency channels and each one of the cordless telephones is capable of establishing a communications link with each one of these base units. Once a cordless telephone establishes communications with a base unit within its reception range, other cordless telephones within this reception range are precluded from establishing communications with this base unit or monitoring or otherwise interfering with communications between the cordless telephone and this base unit while the communications link is established therebetween.

REFERENCES:
patent: 4560832 (1985-12-01), Bond et al.
patent: 4639549 (1987-01-01), Hirayama et al.
patent: 4679225 (1987-07-01), Higashiyama
patent: 4741049 (1988-04-01), DeJager et al.
patent: 4876710 (1989-10-01), Reed et al.
patent: 4878238 (1989-10-01), Rash et al.

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