Method and apparatus for interfacing low speed access links to a high speed time multiplexed switch fabric
CA 2175853 C · Owner: At&T Corp. · Inventors: Pawelski, Robert Lee; Kos, Richard James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high speed time multiplexed switch (TMS) fabric unit for use in a telecommunications system having relatively low speed TMS access links. To receive signals from the low speed access links the TMS fabric unit of the invention, consists of a plurality of programmable multiplexers where each programmable multiplexer is connected to a predetermined number J, of the access links. Eachaccess link carries M time slots where M is a relatively large number i.e. 100. The, programmable multiplexers put the content of the access links onto two high speed links. The speed of the high speed links is at least J times the speed of the access links such that for each time slot on the access links there …
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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 May 6, 1996 and granted September 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 6, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2018.
- 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
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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.