H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/12, 363/16,
H04J 4/00 (2006.01) H04J 3/12 (2006.01) H04M 9/00 (2006.01) H04M 11/06 (2006.01) H04Q 11/00 (2006.01)
Patent
CA 1135425
CARBREY-56 -24- SIGNAL MULTIPLEXING CIRCUIT Abstract of the Disclosure The disclosed signal multiplexing circuit (110) makes use of a single pair of wires (T, R) to interface a data and voice communication circuit such as an electronic key telephone (EKT) station set (100) with a central data and voice communication system such as a communication system (BCS). The signal multiplexing circuit transmits outgoing standard voice signals, outgoing auxiliary signals and outgoing data and, in turn, simultaneously receives incoming standard voice signals, incoming data and incoming auxiliary signals on the single pair of wires. Both time division and frequency separation techniques are concurrently employed to achieve multiple use of the single pair of wires without crosstalk between the plurality of signals.
330564
Kirby Eades Gale Baker
Western Electric Company Incorporated
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