Line interface unit for voice and wide band signal coupling

Details Line interface unit for voice and wide band signal coupling Line interface unit for voice and wide band signal coupling

H - Electricity

04

Q

354/70

H04Q 11/04 (2006.01) H04Q 3/00 (2006.01)

Patent

CA 1123102

LINE INTERFACE UNIT FOR VOICE AND WIDE BAND SIGNAL COUPLING Abstract of the Disclosure A line unit interfaces voice band signals and wide band signals extending from D.C. into the voice band between an analog line and a digital telecommunication facility. The line unit includes an analog to digital converter, a control circuit for generating one of two control signals and a line circuit. The line circuit includes a hybrid circuit in a first signal path for carrying voice band analog signals, and a second signal path for carrying wide band analog signals from the analog line. The signals in either signal path are transmitted to the analog to digital converter for encoding by way of a first switch or a second switch connected in series with the first and second signal paths respectively. The first and second switches are alternately conductive in response to one or the other of the control signals respectively. - i -

332660

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