Arrangement for digital tone distribution
CA 1207068 A · Owner: Gte Automatic Electric Incorporated · Inventors: Parikh, Kamal I.; Magnusson, Stig E.; Puccini, Sergio E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An arrangement for the distribution of digital service tones in a distributed processor digital switching network is shown. These service tones are distributed between the time stages of the digital switching network with a minimum of interprocessor communication. This is accomplished by transmitting the particular service tone from the, terminating time stage which detects the need for tone application, through the switching network paths already established for voice communication. These service tones include such tones as reorder tone dial tone, busy tone, DTMF tones, MF tones and ringback tone.
Read the whole patent
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 July 2, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2003.
- 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.