Patents Represented by Attorney, Agent or Law Firm John R. Witcher
  • Patent number: 6732174
    Abstract: An integrated wireless and wireline telecommunication switch. The switch includes peripheral modules having both wireless and wireline peripheral devices. The switch also includes wireless and wireline software load. An aspect table allows the wireless and wireline software load within the switch to be executed within a single call without creating direct dependencies on each other. The switch allows new and more efficient connections between wireless and wireline subscribers. In many cases wireless and wireline subscribers having direct access to the switch can connect without using any other switches in the network.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: May 4, 2004
    Assignee: Nortel Networks Limited
    Inventors: Chandrakant Gundecha, William David Gentry, Roy Emery Hanzel, C. Michael Brown, Sanjay Bhatia, David Anthony Gallagher
  • Patent number: 6657992
    Abstract: A system and method of using multiple service providers to provide subscriber services on a per call basis achieved by using H.323 capability in a gatekeeper to identify call signaling transfer addresses used for each call. Service subscription data is based on the address or alias being used to place or receive a call. Since telephones can have the ability to register multiple addresses simultaneously, the same phone can receive service from multiple providers simultaneously. In addition, it is possible that some of the addresses or aliases used may be part of a private address space such as, for instance, a private branch exchange (PBX) system. This would enable service from a provider that is not a registered public telephone service provider.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: December 2, 2003
    Assignee: Nortel Networks Limited
    Inventor: Samuel H. Christie, IV
  • Patent number: 6563795
    Abstract: A telecommunications network such as an ATM, Frame Relay or packet based network will be better managed by identifying nodes through which a virtual connection is routed between two end nodes. A new method of tracing the nodes on the route includes sending trace cells downstream of a monitoring node toward one or both end nodes. Each downstream node either loops back a trace cell identifying itself to the monitoring node or forwards the trace cell further. A plurality of trace cells sent along the route identify nodes located thereon. In one embodiment, the trace cell is an extension of the ATM FMOAM cell (ATM Fault Management OAM cell) specified for loopback functions.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: May 13, 2003
    Assignee: Nortel Networks Limited
    Inventors: John Gerald Gruber, Asghar Ebrahim Methiwalla, Richard Vickers