Automated master-slave connectivity dry loop isdn line
CA 2254739 A1 · Owner: Kennedy, Michael · Inventors: Dipperstein, Michael; Katz, Paul H.; Soto, Roy L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A BERT or a voice call ISDN communication dry loop path is automatically established between master and slave ISDN test sets by a connectivity routine that is executed with only minimal preliminary user/craftsperson participation, thereby facilitating use of the test set and minimizing the possibility of errors. Bit error rate testing is conducted by causing a prescribed master - slave message exchange sequence to be automatically executed in response to a user operating a BERT key from a test set menu. A dry loop voice communications path is established over a selected bearer channel in response to the user operating a HOOK key in a conventional POTS sense. A dedicated bearer channel …
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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 1, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 1, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 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.