SURVEILLANCE DEVICE DETECTION WITH COUNTERMEASURES
First Claim
1. An apparatus for detecting surveillance devices on a telephone line comprising:
- a case having at least one line input, at least one line output, a communications output, and a controller;
the controller having a central processing unit and a memory storage and configured to;
(a) instruct a test signal to be transmitted to at least one user-selectable line;
(b) compare a test signal response from one of the user-selectable lines with a baseline signal response;
(c) report a change in the line state of one of the user-selectable lines when the difference between the test signal response and the baseline signal response exceeds a threshold; and
(d) issue a countermeasure based upon countermeasure settings.
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Accused Products
Abstract
Disclosed herein is a method and apparatus for detecting surveillance devices on a telephone line and deployment of countermeasures therefor. The apparatus comprises a line monitoring circuit for evaluating whether the phone is off hook or ringing. A test generation circuit produces a test signal to be injected into a line and issues test commands. A signal response analysis circuit compares a test signal response to a baseline signal response and reports an anomaly when the difference between a test signal response and a baseline signal response exceeds a threshold. Additionally, an anomaly may be reported when an unusual signal is detected, such as a clock. A detection management circuit issues countermeasures to the anomaly based on programmed responses.
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Citations
18 Claims
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1. An apparatus for detecting surveillance devices on a telephone line comprising:
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a case having at least one line input, at least one line output, a communications output, and a controller; the controller having a central processing unit and a memory storage and configured to; (a) instruct a test signal to be transmitted to at least one user-selectable line; (b) compare a test signal response from one of the user-selectable lines with a baseline signal response; (c) report a change in the line state of one of the user-selectable lines when the difference between the test signal response and the baseline signal response exceeds a threshold; and (d) issue a countermeasure based upon countermeasure settings. - View Dependent Claims (2, 3)
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4. An apparatus for detecting a surveillance device on a telephone line and for issuing countermeasures for disrupting a detected surveillance device, comprising:
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a line monitoring circuit for detecting a state of a line; a test generation circuit having a controller for receiving the state of the line from the line monitoring circuit and producing a test signal to be injected into the line and issuing a test command; a test switch circuit for receiving the test command from the controller, injecting the test signal into the line, and receiving a test signal response; a signal conditioning circuit for receiving the test signal response from the test switch circuit and measuring the test signal response; wherein the controller compares the test signal response measurement with a baseline signal response measurement, and issues a countermeasure command when the difference between the test signal response measurement and the baseline signal response measurement exceeds a threshold. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for detecting a surveillance device on a telephone line and administering a countermeasure for disrupting a detected surveillance device comprising:
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monitoring the telephone line to determine a line state; producing a test signal to be injected into a line; issuing a test command for directing the test signal to the line; receiving a test signal response; comparing the test signal response with a baseline signal response; and issuing a countermeasure when the difference between the test signal response and the baseline signal response exceeds a threshold. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification