Telephone having receive call indicating function and mute/light

Details Telephone having receive call indicating function and mute/light Telephone having receive call indicating function and mute/light

1990-05-14

1991-01-01

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Signal reception at substation

379 58, 379396, H04M 100

Patent

active

049824244

ABSTRACT:
The housing of a hand held portable telephone has only a limited amount of surface area for providing a number of functions such as providing for a microphone, a receiver, a ringer, a keypad, an information display panel, a panel light, and a control key. By a reoperation of a control key, some equipment on the surface area is reused to perform a second function without requiring additional surface space.

REFERENCES:
patent: 2283098 (1942-05-01), Shann
patent: 3474196 (1969-10-01), Bottos
patent: 4481382 (1984-11-01), Villa-Real
patent: 4486624 (1984-12-01), Puhl et al.
patent: 4653094 (1987-03-01), Rasmussen et al.
"Mobile Cellular Telephone 17-1002" Radio Shack, 1987 Catalog, Dec. 1986, p. 2.
General Electric CF1000, Received Brochure, Oct. 14, 1986.
NEC M3500, Printed Advertisement, May 5, 1986.

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