Cordless phone haaving a plurality of personal stations

Details Cordless phone haaving a plurality of personal stations Cordless phone haaving a plurality of personal stations

1992-09-30

1994-06-28

Dwyer, James L.

Telephonic communications

Audio message storage, retrieval, or synthesis

H04M 1102

Patent

active

053254201

ABSTRACT:
A cordless phone includes a base station coupled to a line and a plurality of a personal stations communicating with the base station by radio. The base station includes a call detecting circuit for detecting a calling signal corresponding to a ringing tone when the cordless phone is called by an external station, a control signal generator for generating a control signal in synchronism with the calling signal detected by the call detecting circuit, and a circuit for simultaneously transmitting to the plurality of personal stations the control signal generated by the control signal generator. Each of the personal stations includes a ringing tone output circuit for outputting a ringing tone in synchronism with the control signal received by the each of the personal stations, a counter for counting a predetermined clock signal, a reset circuit for resetting the counter to be in an initial state in synchronism with the control signal received by the each of the personal stations, and a carrier transmitter for transmitting a carrier signal to the base station every time a count value of the counter means becomes an identification value identifying the each of the personal stations, a predetermined response signal being transmitted to the base station with the carrier signal.

REFERENCES:
patent: 4875231 (1989-10-01), Hara et al.
patent: 5133002 (1992-07-01), Kikuchi et al.
patent: 5136629 (1992-08-01), Toyama et al.

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