Patents by Inventor William Charles Leach

William Charles Leach 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).

  • Patent number: 6078659
    Abstract: The present invention provides an efficient recovery mechanism when a toll switch within a telephone network is inoperative. A telephone network management operating system and a network manager determines that a toll switch is sufficiently inoperative and invokes a trunk group reconfiguration mechanism. A cross connect system, such as a DCS (Digital Cross-connect System), links the toll-completing trunk groups coming into such an inoperative toll switch to intertoll trunk groups coming into such a toll switch. In this manner, an alternative toll switch within the telephone network replaces the inoperative toll switch for such toll-completing trunk groups thereby restoring operation to customers previously tied to the inoperative toll switch in an efficient and low-cost manner by using already existing components within the telephone network.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: June 20, 2000
    Assignee: AT&T Corp.
    Inventors: Nicholas D. De Trana, Craig L. DeCaluwe, William Charles Leach