Procedure for the processing of an unexpected disconnect request
CA 2277219 C · Owner: Nokia Telecommunications Oy · Inventors: Juntunen, Timo; Heikkila, Vesa; Liinamaa, Olli
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a procedure for the processing of an unexpected disconnect request in an access node (AN) which is connected to a local exchange (LE) over a V5 interface. In the access node (AN) call setdown is , effected by means of a disconnect message which is sent from the local , exchange (LE) and on the basis of which the call resources in the local exchange (LE) are released. According to the invention the resources reserved , in the access node (AN) for the call are preserved. Moreover the local , exchange (LE) is informed that the subscriber is busy thus preventing the , occurrence of an undefined condition between the local exchange (LE) and the access node (AN).
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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, 1998 and granted November 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 26, 2020.
- 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.