Method and system for using tcap signaling for improved call setup from a virtual switching point
CA 2270601 C · Owner: Bell Canada · Inventors: Williams, L. Lloyd; Gilbert, Gordon J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system for using TCAP signaling for improved call setup from a virtual switching point are disclosed. In accordance with the method TCAP signaling is used to enhance call setup from virtual switching points which receive call request messages from calling parties using a facility on a data network such as the Internet. TCAP signaling is used when necessary to determine the availability of the called party telephone. The system includes a Virtual Switching Point (VSP) in a switched telephone network having a connection to a data network such as the Internet. Call requests are received by the VSP from the data network and processed by the VSP to establish a voice connection …
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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 3, 1999 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 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.