Telephonic communications – Substation or terminal circuitry – Conversion of signal form
Patent
1994-06-10
1996-02-27
Hofsass, Jeffery
Telephonic communications
Substation or terminal circuitry
Conversion of signal form
379391, 379395, 379396, 381100, 381104, 381107, H04M 160
Patent
active
054955270
ABSTRACT:
A telephone privacy device includes first and second connectors that are mateable with a telephone handset and a telephone base, respectively. The handset includes a microphone, and the device includes a variable amplifier that allows the user to amplify the microphone signal to a desired level prior to sending it on to the base. A signal strength display allows the user to monitor the amplitude of the amplified microphone signal. A side tone suppression circuit generates a side tone suppression signal in response to the amplified microphone signal. This side tone suppression signal is used to reduce excessive side tone from the telephone base. An adjustable gain amplifier amplifies the speaker signal supplied by the base for the handset speaker.
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"Ignition Revolution" OS/2 For Corporate America, Mar. 1994, pp. 27, 29, 31.
"Disguise your voice when answering the phone, and discourage unwanted calls" (Mar., 1994).
DelPlato Chris
Knutsen Eric
Rollhaus, Jr. Philip E.
Ryan James
Hofsass Jeffery
Ouixote Corporation
Saint-Surin Jacques M.
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