Private ip telephony backbone linking widely-distributed enterprise sites
CA 2351608 A1 · Owner: Neyman, Igor · Inventors: Neyman, Igor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hybrid IP backbone network (27) spans geographic locations of two or more publicly-switched telephone networks (15 17, 19) and includes nodes (21, 23, 25) with translation servers adapted to translate between data protocols compatible with the PSTNs and a data protocol compatible with the IP bakcbone network. Calls placed in one PSTN then may be routed to an IP node translated , to data-packet protocol, through the IP backbone to a second node having another translation server, and therethrough into another PSTN and thence to a final destination. In some embodiments data gateways (69) and trunk gateways (71) are also provided at and integrated with IP nodes in the IP backbone …
Read the whole patent
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, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2021.
- 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.