Patents by Inventor Janice Elaine Doerner

Janice Elaine Doerner 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).

  • Fault tolerant virtual tandem switch
    Patent number: 7227837
    Abstract: A system and method for reducing and surviving failures in a voice trunking over ATM (VTOA) environment includes an ATM network having a plurality of interconnected ATM switches. The VTOA system also includes a CS-IWF complex having a plurality of interconnected CS-IWF units, each unit having a plurality of processors. An end office building may also be provided for interaction with the VTOA system. The end office building includes multiple T-IWFs, and a switch that distributes calls among the T-IWFs in a load sharing manner. Each T-IWF has a plurality of processors and is part of the VTOA system. A switch management system is also provided in the VTOA system. In order to reduce and survive failures, the switch management system includes a plurality of switch management system units. At least one of the switch management system units is a backup unit for at least one primary switch management system unit. Each switch management system unit provides application redundancy within itself.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: June 5, 2007
    Assignee: AT&T Labs, Inc.
    Inventors: Haifeng Bi, George Coleman Allen, Jr., Randy Beamon, Weijing Chen, Janice Elaine Doerner, Mehran Esfandiari, Gary Jonathan Gibbons, Paul August Kaschube, Bruce Allen Nance, John Pinch, Tina Sigarto, Barbara Engel Smith, Matthew Wayne Stafford, George Anthony Young