A system and method for overlaying a dsl access multiplexer onto existing_access systems by reusing test buses
CA 2332705 A1 · Owner: Weirich, Andreas · Inventors: Weirich, Andreas; Isfan, Allan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital subscriber line access multiplexer overlay onto a digital loop carrier system for, transporting high speed digital data over an existing backplane which carrier voice, data, and test signals, between voice line cards and a carrier line the voice , signals being time, division multiplexed (TDM) into frames the system comprising: a data bus , interface for impressing the high speed data on a subset of existing backplane buses for transport along, the backplane and for retrieving high speed digital data from the backplane buses; and a, plurality of data line cards for connecting to the backplane and backplane subset, conductors, the data line cards being adapted to couple the …
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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 January 26, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 26, 2023.
- 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.