Patents by Inventor Ellen Oschmann

Ellen Oschmann 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).

  • Network management system providing logic signals over communication lines for detecting peripheral devices
    Patent number: 7603486
    Abstract: A method and apparatus for detecting the presence and the type of network devices connected to a management device via transmission lines. The apparatus may include a pull-up resistor, a pull-down resistor, a filter, and a presence detector, the resistors superimposing a DC or low-frequency voltage on the transmission line. The impact, if any, of the DC voltage one communications equipment and circuitry can be reduced by a coupling that isolates the DC voltage. Similarly, the filter prevents transmitted data signals from interfering with the DC voltage level. The method and apparatus function regardless of whether the network device is functional or powered on, and different values of pull-up or pull-down resistors can be used to indicate the type of device that terminates the transmission line.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: October 13, 2009
    Assignee: 3Com Corporation
    Inventors: Linh My Le, Dwight D. Dipert, Ellen Oschmann
  • System for providing logic signals over communication lines
    Publication number: 20040101133
    Abstract: A method and apparatus for detecting the presence and the type of network devices connected to a management device via transmission lines. The apparatus may include a pull-up resistor, a pull-down resistor, a filter, and a presence detector, the resistors superimposing a DC or low-frequency voltage on the transmission line. The impact, if any, of the DC voltage one communications equipment and circuitry can be reduced by a coupling that isolates the DC voltage. Similarly, the filter prevents transmitted data signals from interfering with the DC voltage level. The method and apparatus function regardless of whether the network device is functional or powered on, and different values of pull-up or pull-down resistors can be used to indicate the type of device that terminates the transmission line.
    Type: Application
    Filed: November 26, 2002
    Publication date: May 27, 2004
    Inventors: Linh My Le, Dwight D. Dipert, Ellen Oschmann