Voice communication link interface

Details Voice communication link interface Voice communication link interface

1992-02-13

1993-08-10

Dwyer, James L.

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

379388, 379389, 379390, 379416, H04M 160

Patent

active

052356370

ABSTRACT:
An apparatus 10 controls the two-way communication between the microphone 12 and speaker 36 of a telephone headset and a telephone base. A transmit channel 15 includes an expander 18 that controllably attenuates the transmitted communication signal when the user is not speaking into the microphone 12. Conversely, a receive channel 30 includes a compressor 34 that controllably attenuates the received communication signal to prevent over driving the speaker 36.

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patent: 5070527 (1991-12-01), Lynn

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