Cordless telephone

Details Cordless telephone Cordless telephone

H - Electricity

04

M

379/11

H04M 1/00 (2006.01) H04M 1/727 (2006.01)

Patent

CA 1232384

Abstract of the Disclosure A cordless telephone includes a base unit and a handset unit. When the handset unit is mounted on -the base unit, an identifying code is automatically generated and stored in both units. Thereafter, when an incoming or outgoing telephone call is initiated, the two stored identi- fying codes are compared, and the telephone call proceeds only if the two identifying codes are identical. The new identifying code is generated as a counted value in accor- dance with a predetermined time following the mounting of the handset unit on the base unit. By having the prede- termined time vary from telephone to telephone, the identi- fying codes will also vary, eliminating crosstalk interfer- ence and the risk of wiretapping.

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