Cordless telephone base unit arranged for operating with...

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

H - Electricity

04

M

H04M 1/00 (2006.01) H04M 1/725 (2006.01) H04M 1/727 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2161725

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.

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