Patents by Inventor Craig S. Telke

Craig S. Telke 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).

  • Transport mechanism for ISDN backhaul over IP
    Patent number: 6839344
    Abstract: A method and apparatus are provided for establishing and maintaining a backhaul link over an Internet Protocol based network for transporting Layer 3 ISDN messages. A signalling gateway establishes a TCP connection to a Media Gateway Controller through the IP based network. The Layer 3 ISDN messages generated within an ISDN network attached to the IP based network are then transported between the signalling gateway and the Media Gateway Controller over the TCP connection. The integrity of the TCP connection is monitored using a heartbeat mechanism based on UDP packets. Both the signalling gateway and the Media Gateway Controller transmit UDP packets at regular intervals, and monitor for the arrival of UDP packets from the other device. If a provisioned number of consecutive UDP packets do not arrive from the other device, then a failure of the backhaul link is declared. The signalling gateway then attempts to re-establish the backhaul link.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: January 4, 2005
    Assignee: Nortel Networks Limited
    Inventors: Pierre Couillaud, Milos D. Pujic, Craig S. Telke