Patents by Inventor George C. Allen, Jr.

George C. Allen, Jr. 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).

  • Virtual tandem switch
    Patent number: 7099311
    Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking function (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: August 29, 2006
    Assignee: SBC Technology Resources, Inc.
    Inventors: George C. Allen, Jr., Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson
  • ATM-based distributed virtual tandem switching system
    Patent number: 6389011
    Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking function (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: May 14, 2002
    Assignee: SBC Technology Resources, Inc.
    Inventors: George C. Allen, Jr., Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson
  • ATM-based distributed virtual tandem switching system
    Patent number: 6345048
    Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking function (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: February 5, 2002
    Assignee: SBC Technology Resources, Inc.
    Inventors: George C. Allen, Jr., Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson
  • ATM-based distributed virtual tandem switching system
    Patent number: 6219348
    Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking finction (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: April 17, 2001
    Assignee: SBC Technology Resources, Inc.
    Inventors: George C. Allen, Jr., Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson
  • ATM-based distributed virtual tandem switching system
    Patent number: 6169735
    Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking function (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: January 2, 2001
    Assignee: SBC Technology Resources, Inc.
    Inventors: George C. Allen, Jr., Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson