Patents by Inventor Devki Nandan Goyal

Devki Nandan Goyal 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).

  • Method of accessing an IP in an ISDN network with partial release
    Patent number: 6215864
    Abstract: A method and system in an ISDN network for exchanging call control information between a switch and an IP, and for call set-up and call clearing for intermediate access to an IP. The invention utilizes the User-User Information (UUI) element of the Q.931 messages to exchange call information between a switch and an IP. A subscriber call results in a connection being established to an IP. A request to the IP is encoded in the UUI element of a SETUP message, and call routing information is encoded in the UUI element of a returned DISCONNECT message. The DISCONNECT message causes a partial call release of only the circuit segments from the IP back to the switch. The circuit segments from the calling party to the switch are maintained. The switch then routes the user call to a final destination based on information contained in the UUI element of the DISCONNECT message.
    Type: Grant
    Filed: January 12, 1998
    Date of Patent: April 10, 2001
    Assignee: AG Communication Systems Corporation
    Inventors: Devki Nandan Goyal, Nigel Henry Baker