Multiport conference circuit with multi-frame summing

Details Multiport conference circuit with multi-frame summing Multiport conference circuit with multi-frame summing

1979-08-06

1981-03-17

Stewart, David L.

Multiplex communications

Wide area network

Packet switching

179 18BC, H04M 356

Patent

active

042571200

ABSTRACT:
An improved conference circuit for use in a Pulse Code Modulation telephone switching system wherein a number of channels are combined so that a number of subscribers may participate in a common telephone conversation. The conference circuit is provided with a multi-frame voice level summing arrangement whereby spurious channel switching caused by noise peaks is effectively eliminated.

REFERENCES:
patent: 3551600 (1970-12-01), Berch
patent: 3748394 (1973-07-01), Thomas
patent: 3947639 (1976-03-01), Nicholas
patent: 4054755 (1977-10-01), Lee
patent: 4175215 (1979-11-01), McLaughlin

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