Patents by Inventor Mark S. Mui

Mark S. Mui 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).

  • Network interconnect backup
    Patent number: 5592466
    Abstract: A system and method for backing up CCS7 call control messages between an IXC network and an LEC network in the event of failures in the CNI-based signaling system of the IXC toll switches. The architecture provides network paths for the LEC's CCS7 call control messages to reach the IXC toll switches with CCS7 signaling isolation, and for control messages from the CCS7-isolated toll switches to reach the LEC's switching offices. Messages from the LEC are routed from an IXC Signal Transfer Point to a Gateway switch. The Gateway switch routes the messages to the isolated victim switch via helper switches using 56 kbps F-links to the victim switch.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: January 7, 1997
    Assignee: AT&T
    Inventors: Frank A. Buczny, Mark S. Mui, Doug W. Varney