Cordless telephone base unit arranged for operating with multipl

Details Cordless telephone base unit arranged for operating with multipl Cordless telephone base unit arranged for operating with multipl

1994-12-01

1997-11-18

Bost, Dwayne

Telephonic communications

Audio message storage, retrieval, or synthesis

379 58, 379 62, H04Q 720

Patent

active

056895496

ABSTRACT:
A cordless telephone system includes an arrangement wherein multiple portable units operate with a common base unit using the same security code without conflict or confusion. When a portable unit attempts to establish a radio link with the base unit, for example, this originating portable unit generates a random number which is retained by this unit and also transmitted to the base unit. This random number is substituted for the common stored security code, then shared by the base unit and all of the portable units, for creating a temporary unique security code that is known only to the base unit and the originating portable unit. Interference from other portable units attempting to gain access to the base unit while the originating portable unit is actively communicating with the base unit is thereby advantageously prevented.

REFERENCES:
patent: 4736404 (1988-04-01), Anglikowski et al.
patent: 4878238 (1989-10-01), Rash et al.
patent: 5020094 (1991-05-01), Rash et al.
patent: 5243641 (1993-09-01), Evans et al.
patent: 5325420 (1994-06-01), Kikuchi
patent: 5371782 (1994-12-01), Casey, III et al.
patent: 5388212 (1995-02-01), Gube et al.
patent: 5448764 (1995-09-01), Sondermann et al.
patent: 5500888 (1996-03-01), Chiu et al.

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