Method and apparatus for quality monitoring of at least two transmission sections of a digital signal transmission link
CA 2012568 C · Owner: Grallert, Hans-Joachim · Inventors: Grallert, Hans-Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method for quality monitoring of at least two series connected transmission sections in a digital signal transmission link for digital equipment conforming to the synchronous digital hierarchy. Error message bytes in which parity errors are accumulated are transmitted in the section overhead of synchronous transport modules as special bytes for the accumulation of parity errors in successive transmission sections. A quality criterion for the monitored transmission link is acquired from a sequence of error message bytes. The method and the apparatus can be advantageously used in transmission equipment of digital synchronous hierarchy.
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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 March 20, 1990 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 2012.
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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.