Patents by Inventor Daniel D. Lewallen

Daniel D. Lewallen 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).

  • Direct memory access packet router method and apparatus
    Patent number: 6747978
    Abstract: Disclosed is an apparatus for and method of routing telephony data packets by checking the address of each data packet as the data packet is sent to a common random access memory to be used by all of a plurality of router. The appropriate output link is ascertained by use of a lookup table accessible by each of the plurality of routers. The location of the data packet in memory is then sent to a FIFO entity associated with the appropriate output link. When the queue for that link reaches a pointer in the FIFO for that data packet, it is retrieved from memory and forwarded to its destination.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: June 8, 2004
    Assignee: Nortel Networks Limited
    Inventors: Daniel D. Lewallen, John A. Interrante, William M. Hurley