Patents by Inventor David A. Getchell

David A. Getchell 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).

  • Extending SONET/SDH automatic protection switching
    Patent number: 7570583
    Abstract: The invention provides a method and system for coupling a SONET/SDH network to a routing network that does not have a single point of failure. Multiple routers are coupled between the SONET/SDH network and the routing network, one for each data path; for example, a first router for the working data path and a second router for the protection data path. The routers intercommunicate to force APS to switch data paths bidirectionally, so as to allow only a single router for each data path.
    Type: Grant
    Filed: February 15, 2005
    Date of Patent: August 4, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Robert Broberg, David A. Getchell