Method for preventing call congestion on outgoing trunks of a local telephone exchange
CA 2228189 C · Owner: Bell Canada · Inventors: Kwok, Henry Wai Chiu; Bartholomew, Gary; Lothian, R. Blair
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method of preventing call congestion on outgoing trunks of a local telephone exchange is provided. A virtual trunk group representing a percentage of the total trunk capacity is assigned at the local exchange for carrying calls which are likely to cause congestion. In one embodiment of the invention call, segregation is achieved by using the prefixed dialling code 1+1 followed by the destination number. In another embodiment of the invention, segregation is dynamically achieved using Advanced Intelligent Network (AIN) routing.
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 January 27, 1998 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 27, 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.