Method and apparatus for accessing communication systems
CA 1235540 A · Owner: Tii Computer Systems, Inc. · Inventors: Walsworth, Richard L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for accessing communication system includes a microprocessor for controlling said accessing. Communication line access is accomplished by an interface with test trunk equipment and MDF shoes. Capability for generating dial pulse DTMF and, multifrequency dialing signals is included. Communications components and a test bus permit the apparatus to interface with a supervisor unit and a testing unit.
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 April 19, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 19, 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.