Patents by Inventor Wiley J. Ehrke

Wiley J. Ehrke 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).

  • ISDN testing device and method
    Patent number: 4989202
    Abstract: A test device and a method of testing are provided for an integrated services digital network (ISDN) system having a Network Terminator (NT), a system/terminal (S/T) interface for coupling the NT to a Terminal Equipment (TE), a transmit line between the S/T interface and the NT to permit a TE coupled to the S/T interface to transmit D channel and B channel information to the NT, and a receive line coupled between the NT and S/T interface to permit a TE coupled to the S/T interface to receive D channel and B channel information from the NT. The test device performs an initial line connection test to determine if a satisfactory line connection exists between the NT and the S/T interface connected by the transmit and receive lines by providing a predetermined signal to the NT from the test device and for evaluating a response from the NT to the predetermined signal.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: January 29, 1991
    Assignee: Harris Corporation
    Inventors: Roy L. Soto, Wiley J. Ehrke, Robert J. Homkes