Patents by Inventor John Andrew Shotton

John Andrew Shotton 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).

  • Automated line signal processing
    Patent number: 6778503
    Abstract: A method and apparatus for handling persistence measurement of channel associated signaling for a plurality of line circuits, eg, T1, E1, OC3, STM 1 circuits, which extracts channel associated signaling data from a plurality of line circuits; assembles the channel associated signaling data into a data frame; contains the data frame in a suitable carrier, eg, an AAL 0 cell; monitors a continuous stream of the data frames, to check for changes in line status; and generates an event message data frame when a persistent change of line state has been detected. The extracting of associated signaling data may be provided on a separate card to a call control processor, and using separate processor functionality.
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: August 17, 2004
    Assignee: Nortel Networks Limited
    Inventors: Martin Sproat, Julian Frank Barry Cable, Simon Daniel Brueckheimer, Michael Flynn Thomas, Andrew Geoffrey Tomlins, David John Stacey, John Andrew Shotton, Fai Tsang, Stephen Rylant Evans, William Smith