Bidirectional telewriting system operating in an alternating...

Details Bidirectional telewriting system operating in an alternating... Bidirectional telewriting system operating in an alternating...

H - Electricity

04

N

350/33, 379/4, 3

H04N 1/00 (2006.01) G08C 21/00 (2006.01)

Patent

CA 1114942

Abstract of the Disclosure A bidirectional telewriting system for two-way transmission of of telewriting data over a transmission channel which is shared by a speech link. A frequency window is used within the speech frequency band, within which a single carrier is used. A commutator at each terminal causes alteration in the direction of transmission of the telewriting data over the single carrier.

309015

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