Cordless telephone system having speaker phone function

Details Cordless telephone system having speaker phone function Cordless telephone system having speaker phone function

1995-03-20

1996-11-05

Bost, Dwayne D.

Telephonic communications

Audio message storage, retrieval, or synthesis

379 58, 379420, 379432, H04Q 732, H04Q 730

Patent

active

055725759

ABSTRACT:
A cordless telephone system comprises a base station, a handset unit, and a speaker phone circuit provided in the base station. In response to a request signal indicating that the handset unit uses the speaker phone circuit of the base station, the base station controls its communication path switching means (SW 33, 34) to connect its own speaker phone circuit (28) to a radio transmitting section (20) and a radio receiving section (18). Audio signals picked up by a microphone of the handset unit are transmitted to the speaker phone circuit (28), while audio signals of the speaker phone (28) are sent to a speaker of the handset unit. With this arrangement, a speaker phone communication is realized by the handset unit even if the handset unit has no speaker phone circuit.

REFERENCES:
patent: 4640987 (1987-02-01), Tsukada et al.
patent: 5073928 (1991-12-01), Shimanuki
patent: 5220594 (1993-06-01), Ohnishi et al.

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