Telephone system with automatic volume control

Details Telephone system with automatic volume control Telephone system with automatic volume control

1994-04-18

1997-02-18

Hofsass, Jeffrey

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

379428, 379434, 379165, 379422, H04M 172

Patent

active

056047983

ABSTRACT:
A You Talk Two Phone is provided that is a true two handset telephone device. With conventional telephones, when more than one telephone is bridged to a phone line the amplitude of the incoming and outgoing signals drop as telephones are added. The You Talk Two Phone contains two handsets and circutry that automatically adjusts internal amplifier gain to compensate for the extra handset even when not in use. The invention has audible and visible indicators of incoming calls as well as lamps that indicate when either or both handsets are in use. A jack is provided that allows a conventional phone to plugged in, or an additional You Talk Two Phone.

REFERENCES:
patent: 3895189 (1975-07-01), Matz
patent: 4107477 (1978-08-01), Morisson
patent: 4536621 (1985-08-01), Bergen et al.
patent: 5014302 (1991-05-01), Kappeler et al.
patent: 5278893 (1994-01-01), Voser et al.

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