Protection switching in a multi-channel communications system
CA 1290431 C · Owner: Nortel Networks Corporation · Inventors: Bobey, Kenneth Andrew; Reid, David Ian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, In a multi-channel multi-site communications sytem, spans on working channels extending in an overlapping manner among the sites are afforded protection by a protection channel in accordance with a priority scheme. Enabling of protection switching for each span in the event of a signal failure on the span is dependent upon whether there is any protected higher priority overlapping span. This is determined individually for each span in response to each change in protection requests in the system. - i -
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
- Granted October 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2008.
- 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.