Patents by Inventor Nhat Quang Pham

Nhat Quang Pham 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).

  • Protection switch architecture for digital cross-connect system
    Patent number: 6538869
    Abstract: A protection switch architecture is disclosed for a digital cross-connect system having a main controller, a command interface, and at least one digital signal processing unit. The digital signal processing unit includes one or more signal processing service devices and one or more signal processing protection devices that correspond to the service devices. A unit controller includes the protection switch for switching signal processing responsibilities between the service devices and the protection devices. Advantageously, the protection switch is adapted to act independently of the main controller in reponse to autonomous switching requests from the service devices by completing all protection switching related to such protection requests without main controller involvement. The protection switch also acts in response to manual switching requests from the main controller.
    Type: Grant
    Filed: April 22, 2000
    Date of Patent: March 25, 2003
    Assignee: Lucent Technologies Inc.
    Inventors: Hung Lee, Nhat Quang Pham