Multichannel telephonic switching network with different signaling formats and cross connect/pbx treatment selectable for each channel
CA 2082608 C · Owner: Jones, Barry W. · Inventors: Purtell, Gordon J.; Jones, Barry W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A telephonic switching network (20) having a plurality of multichannel incoming switching circuits a central control, processor (22) for controlling the incoming switching circuits (24, 36) to switch a selected plurality of incoming time division multiplex channels of PCM voice data on incoming lines (42) of a plurality of multichannel receiving circuits (36) to a plurality of selected outgoing channels on ongoing lines (58) of a plurality of multichannel outgoing switching circuits in accordance with messages representative of analysis of signaling data embedded in the PCM voice data by a plurality of relatively lower order processors (18) of said plurality of incoming multichannel …
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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
- Filed November 10, 1992 and granted May 20, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2014.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.