Patents by Inventor John M. Madden

John M. Madden 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).

  • System and method for cell switching with a peripheral component interconnect bus and decentralized, computer-controlled cell switch
    Patent number: 6311230
    Abstract: A port card employable in a cell switch including a host computer having a processor and a bus for interconnecting a plurality of port cards and a method of switching cells in the cell switch. The port card includes: (1) bus master circuitry for gaining control of the bus to allow the port card to place cells to be switched in the cell switch on the bus and (2) interface circuitry, coupled to the local memory and the bus master circuitry, that places the cells on the bus when the bus master circuitry has gained control of the bus, the cells communicated directly from the interface circuitry to another port card in the cell switch via the bus. The processor (or, more generally, the host computer) is relieved of having to participate directly in switching the cells.
    Type: Grant
    Filed: December 26, 1997
    Date of Patent: October 30, 2001
    Assignee: Avaya Technology Corp.
    Inventors: Robert E. Cochran, John M. Madden, Frederick H. Meyer, David R. Rhee, Arthur J. Wilton