Cordless telephone set with a call detecting unit which protects

Telephonic communications – Audio message storage – retrieval – or synthesis

Patent

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Details

379 58, 455331, H04Q 732

Patent

active

054815932

ABSTRACT:
A cordless telephone set includes a battery, and a communications part for communicating with another cordless telephone set via a transmission medium including radio channels, the communications part comprising a part which detects a call received via the transmission medium and indicates receipt of the call. A D.C. signal detection unit detects a D.C. signal supplied from a battery charger when a battery is coupled to the battery charger and charged thereby. A power supply line setting unit, which is coupled to the part of the communications part and the D.C. signal detection unit, establishes a power supply line for supplying electricity generated by the battery charger to the part of the communications part when the D.C. signal detection unit detects the D.C. signal.

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patent: 4920557 (1990-04-01), Umemoto
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patent: 5005198 (1991-04-01), Toda
patent: 5241582 (1993-08-01), Park
patent: 5369798 (1994-11-01), Lee

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