Digital conference circuit

Details Digital conference circuit Digital conference circuit

1977-11-25

1979-05-08

Cooper, William C.

H04M 356

Patent

active

041538170

ABSTRACT:
A digital conference circuit provides greater stability in voice transmission by selectively inverting the signal in alternate conference channels, thereby providing cancellation of parasitic echo signals which tend to create oscillations or ringing. Selective gain control is also provided for conferences of different sizes and efficient use of conference lines is ensured by providing for selective combination of conference groups.

REFERENCES:
patent: 3882276 (1975-05-01), Feiner et al.

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