Abstract: A security system is disclosed for detecting intrusions at a plurality of predetermined locations having moveable closure members. The system comprises a plurality of intrusion sensors disposed at the locations for detecting movement of the closure members. Primary and secondary optical fiber sensor lines are routed through the intrusion sensors, and primary and secondary scanning units pulse signals along the sensor lines and receive reflected signals back from the sensor lines. A processor processes the reflected signals to determine if a reflection and/or attenuation change has occurred in a reflected pulse signal signifying a prescribed level of unauthorized intrusion activity which matches a signature intrusion signal. In the event of a cut through in the sensor lines, the primary sensor line monitors the sensors downstream of the break, and the secondary sensor line is activated to monitor the sensors upstream of the break.

Abstract: A computerized apparatus and method for detecting unauthorized activity in a protected area in real-time using a fiber optic cable having an optical sensor line, a fiber scanning unit, and a computer. Detecting unauthorized activity is done by scanning the sensor line using the scanning unit to obtain repetitive scan signals representing the state of the sensor line, receiving scan signals at the computer, processing the scan signals to determine an initial baseline representing the normal state of the sensor line, storing the baseline, continuously monitoring the sensor line using the scan signals received in real-time by the computer, comparing the scan signal to the baseline, determining if a fault has occurred based on an predetermined attenuation change in one or more of the scan signals as compared to the baseline, generating a fault signal, and providing a warning of a fault in response to the fault signal.

Abstract: The invention consists of a secure data transmission cable for electronically transmitting secure data between remote locations in an exposed condition. The data transmission cable comprises a tubular outer protective layer, an inner core disposed within the outer protective layer, a data transmission line carried within the inner core for transmitting secure data between the remote locations, and a fiber optic sensor line included in the outer protective layer for detecting unauthorized activity relative to the transmission line. The fiber optic data transmission line comprises a plurality of optical fibers for transmitting data between remote locations and for detecting unauthorized activity relative to the transmission line. A protective casing surrounds the data transmission line for protecting the fiber optic data transmission line from contacting the outer protective layer. An outer protective casing braided around the core in which the sensor line is enclosed provides strength to the cable.

Abstract: A security system is disclosed for detecting intrusions at a plurality of predetermined locations having moveable closure members. The system comprises a plurality of intrusion sensors disposed at the locations for detecting movement of the closure members. Primary and secondary optical fiber sensor lines are routed through the intrusion sensors, and primary and secondary scanning units pulse signals along the sensor lines and receive reflected signals back from the sensor lines. A processor processes the reflected signals to determine if a reflection and/or attenuation change has occurred in a reflected pulse signal signifying a prescribed level of unauthorized intrusion activity which matches a signature intrusion signal. In the event of a cut through in the sensor lines, the primary sensor line monitors the sensors downstream of the break, and the secondary sensor line is activated to monitor the sensors downstream of the break.

Abstract: The invention consists of a secure data transmission cable for electronically transmitting secure data between remote locations in an exposed condition. The data transmission cable comprises a tubular outer protective layer, an inner core disposed within the outer protective layer, a data transmission line carried within the inner core for transmitting secure data between the remote locations, and a fiber optic sensor line included in the outer protective layer for detecting unauthorized activity relative to the transmission line. The fiber optic data transmission line comprises a plurality of optical fibers for transmitting data between remote locations and for detecting unauthorized activity relative to the transmission line. A protective casing surrounds the data transmission line for protecting the fiber optic data transmission line from contacting the outer protective layer. An outer protective casing braided around the core in which the sensor line is enclosed provides strength to the cable.