Multiplex communications – Wide area network – Packet switching
Patent
1979-08-06
1981-06-16
Brown, Thomas W.
Multiplex communications
Wide area network
Packet switching
H04J 302, H04M 356
Patent
active
042741556
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 voice level coding arrangement whereby the voice level comparisons used in the speaker selection process are facilitated, and with a multi-frame coded voice level summing arrangement whereby channel switching caused by spurious noise peaks is effectively eliminated.
REFERENCES:
patent: 3947639 (1976-03-01), Nicholas et al.
patent: 4054755 (1977-10-01), Lee et al.
patent: 4059735 (1977-11-01), Betts
patent: 4175215 (1979-11-01), McLaughlin et al.
Funderburk Tim
McLaughlin Donald W.
Black Robert J.
Brown Thomas W.
Doktycz Charles A.
GTE Automatic Electric Laboratories Inc.
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