Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – For detection of eavesdropping device
Patent
1985-12-16
1987-04-14
Schreyer, Stafford D.
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
For detection of eavesdropping device
379 26, H04B 346
Patent
active
046580999
ABSTRACT:
Method and apparatus for detecting whether or not an unauthorized surveillance device has been installed on a communications line between user terminal equipment and central switching station equipment. Apparatus is installed at the central switching station and receives a test request signal from the user terminal equipment, such as a telephone. A receiving device receives the remotely generated test signal and activates the test. A measuring device then measures electrical characteristics of the communications line to determine the presence or absence of the "bug". The measuring device provides output signals indicative of the security status of the line. A signalling device responds to the output signals and provides a status signal to the user terminal equipment through the communications line. The status signal indicates the security status of the communications line.
REFERENCES:
patent: 4186282 (1980-01-01), Ellson
patent: 4218592 (1980-08-01), Steinbergs et al.
Schreyer Stafford D.
Security Call, Inc.
LandOfFree
Apparatus and method for remotely determining the presence of un does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for remotely determining the presence of un, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for remotely determining the presence of un will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1787754