CORDLESS TELEPHONE BASE UNIT ARRANGED FOR OPERATING WITH MULTIPLE PORTABLE UNITS

摘要

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 li nk with the base unit, for example, this originating portable unit generates a rando m 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 th e 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. Interferen ce from other portable units attempting to gain access to the base unit while the o riginating portable unit is actively communicating with the base unit is thereby advant ageously prevented.