Method of communicating management message and system for communicating management message
CA 2327607 A1 · Owner: Yoshiyama, Shunji · Inventors: Yoshiyama, Shunji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the system for communicating a management message between nodes in a wavelength division multiplexing network 1, each of the nodes has a switching unit 101 for switching a transmission path of an optical channel signal carried by the network. The optical channel signal has a frame in compliance with the SDH/SONET standard that stipulates the Data Communication Channel Bytes D4-D12 in the Line Overhead Byte to be allocated for a management message. Each of the nodes includes a termination and generation means for terminating the bytes D4-D12 and extracts a management message from the bytes when each of the nodes receives the optical channel signal. The node judges an optical channel to …
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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 December 5, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2022.
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Timeline
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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.