Patents by Inventor Robert R. Beffel

Robert R. Beffel 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).

  • Verification of subscriber lines prior to cutover to a new switching system
    Patent number: 5187733
    Abstract: The present invention addresses an improved solution to the problem of cutover verification testing where a new digital switching system is to replace an existing switching system that serves at least a group of subscribers via continuous wire lines. It permits a plurality of existing wire lines to be concurrently connected to channel units associated with the new switching system without adversely impacting the existing service and automatic testing under the control of the new system.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: February 16, 1993
    Assignee: AT&T Bell Laboratories
    Inventors: Robert R. Beffel, Ellen R. Blood, Paul R. Bufkin, Bernard M. Dennison, Jerry G. Miller, James L. Turner