Patents by Inventor Renato Tramontina

Renato Tramontina 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).

  • System for maintaining an active data link layer for ISDN call processing during a software reset operation
    Publication number: 20050071474
    Abstract: The data link layer maintenance system executes in the Q.921 protocol server of the serving ISDN Access Node and maintains the data link layer active in the ISDN-based Terminal Equipment and the Q.921 protocol server of the serving ISDN Access Node during the execution of a software reset process. This is accomplished by the Q.921 protocol server of the serving ISDN Access Node software storing the data communications connection data in a persistent table that survives the software reset operation. A predetermined set of control signals is then exchanged between the Q.921 protocol server of the serving ISDN Access Node and the ISDN-based Terminal Equipment in response to the initiation of a software reset process to execute standard signaling processes of the LAP-D protocol to force the Terminal Equipment and the Q.921 protocol server of the serving ISDN Access Node into a predetermined stable state.
    Type: Application
    Filed: September 29, 2003
    Publication date: March 31, 2005
    Inventors: Ning Lei, Renato Tramontina