Patents by Inventor Stephen M. Aspell

Stephen M. Aspell 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).

  • METHODS AND APPARATUS TO TEST A CENTRAL OFFICE DIGITAL SUBSCRIBER LINE MODEM
    Publication number: 20090252207
    Abstract: Methods and apparatus to test a central office (CO) digital subscriber line (DSL) modem are disclosed. An example line termination module for a DSL access multiplexer (DSLAM) comprises a printed circuit board, a plurality of DSL terminal unit-central (DTU-C) modems implemented on the printed circuit board, a DSL terminal unit-remote (DTU-R) modem implemented on the printed circuit board to test the DTU-C modems, and a switch implemented on the printed circuit board to selectively couple the DTU-R modem to a tested one of the DTU-C modems or to a subscriber line.
    Type: Application
    Filed: April 3, 2008
    Publication date: October 8, 2009
    Inventors: Ronald Brost, Goangshiuan Shawn Ying, Stephen M. Aspell, Eugene L. Edmon