Patents by Inventor Brian C. Tester

Brian C. Tester has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Detecting local exchange failure and resultant control of a communications network
    Patent number: 5583928
    Abstract: Failure of a local exchange in a communications network (such as the PSTN) is detected by monitoring a combination of parameters. Each parameter in the combination is monitored for meeting predetermined criteria. In particular, a local exchange failure is recognized when the average value of the All Circuits Engaged (ACE) parameters over all traffic routes into a local exchange rises in a significant manner and the average value of the Circuits in Service (CCTS IS) parameters over all traffic routes into that exchange decreases in a significant manner.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: December 10, 1996
    Assignee: British Telecommunications public limited company
    Inventors: Brian C. Tester, Donald Fisk, Charles A. Swaine