Patents by Inventor Tri H. Doan

Tri H. Doan 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).

  • Sonet synchronous payload envelope pointer control system
    Patent number: 6671271
    Abstract: A multiported integrated circuit performs pointer processing at the SONET STS and VT levels, and removes overhead information from a received electrical signal derived from an optical SONET signal. The integrated circuit operates to extract STM traffic and ATM traffic from the received SONET signal, in response to provisioning information received from a management and control unit. The extracted STM traffic is then combined with path switching information, and forwarded out a pair of interfaces, which enables path selection within an STM switch fabric within a local line unit and within a switch fabric on a partner line unit in an active/standby pair of line units. The path switching information is also output from the integrated circuit for transmission to a pair of ATM switch fabric units.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: December 30, 2003
    Assignee: Fujitsu Network Communications, Inc.
    Inventors: Takenao Takemura, Tri H. Doan, Akihiko Okutsu, Srinivas Pudu