Method of and arrangement for establishing a conference connection in a tdm communication system
CA 1211823 A · Owner: N.V. Philips'Gloeilampenfabrieken · Inventors: Bohlmeyer, Nicolaas; Hartman, Johan E.A.; Van Baardewijk, Johannes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PHN 10 294 12, ABSTRACT:, To establish a conference connection between three participants in a TDM telephony system use is made, of the time-diivision switching stage which in many cases is already of a duplicated construction. The information signals (a, b, c) from the participants are written into corresponding addresses (AA, BB, CC) of two information memories while these addresses, after having been cyclically permuted, are written into the address memory associated with each of the information memories. When now the locations in the information memories are read in the sequence indicated by the address memories and summed thereafter, then each participant in the conference is supplied …
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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 September 23, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 2003.
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Timeline
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.