Time division switching system control arrangement and method
CA 1237188 A · Owner: American Telephone And Telegraph Company · Inventors: Naiman, Sheldon; Pector, Scott W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A method and arrangement for controlling a time division switching system including a time multiplexed switch is disclosed. The time division switching system comprises a plurality of time-slot interchange units which connect subscriber sets to the input/output ports of a time multiplexed switch. When a connection is to be established between time-slot interchange units, a central control transmits to the time multiplexed switch a path setup message defining the input/output ports to be connected and the time slot to be used for such a connection. The time multiplexed switch controller responds to the path setup messages by disconnecting existing connections through the time …
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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
- Granted May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
- 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.