Simultaneous transmission of voice and data signals over a digital channel
CA 1185712 A · Owner: Western Electric Company, Incorporated · Inventors: Wyndrum, Ralph W. Jr.; Brolin, Stephen J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmission system comprises apparatus for the transmission of voice signals only, data signals only or a, combination of both voice and data signals in a multiplexed stream of eight bit time slots over a single bidirectional, digital channel for a point-to-point connection. In the combined mode, the encoded voice signals using low bit, rate voice encoders, are assigned to four bit positions of the eight bit time slot; the data signals are assigned to the remaining four bits. Up to two bit positions normally used for data may be used for signature bits thereby, identifying whether the multiplexed stream comprises voice signals only, data signals only, or a combination of both voice and …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.