Digital conference bridge

Details Digital conference bridge Digital conference bridge

1975-01-13

1976-07-20

Claffy, Kathleen H.

179 1CN, H04M 356, H04M 158

Patent

active

039707970

ABSTRACT:
A Digital/analog conference arrangement for up to M (15) digital subscribers. The digital signals are sensed, and up to N (3) are converted at the same time to analog signals which are processed in an analog bridge, then converted to digital signals which are transmitted to the appropriate subscribers. The voice signals of each subscriber are encoded by the continuously variable slope delta modulation (CVSD) technique into a serial digital bit stream, which are time-multiplexed into 15 input channels.

REFERENCES:
patent: 3165588 (1965-01-01), Holzer
patent: 3293369 (1966-12-01), Schroeder
patent: 3428754 (1969-02-01), Hoyler
patent: 3530246 (1970-09-01), Kelly
patent: 3530247 (1970-09-01), Huber
patent: 3824344 (1974-07-01), James
patent: 3828146 (1974-08-01), Lewis

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