Patents Assigned to Secom General Corporation
  • Wire tap detection device with passive testing
    Patent number: 4760592
    Abstract: The device of the present invention discloses an electrical circuit which is electrically connected to a telephone line or data line between the telephone line or data line and the telephone set. In operation, the device continuously measures various electrical properties of the telephone or data line while a signal is passively generated on to the telephone or data line by simulating an on-hook to off-hook and back again condition of the telephone handset.
    Type: Grant
    Filed: February 21, 1986
    Date of Patent: July 26, 1988
    Assignee: Secom General Corporation
    Inventor: Robert P. Hensley