Abstract: In a security system, a method and apparatus for two-way frequency hopping communications between the control panel and each peripheral device which maintains channel synchronization through the assignment of fixed beacon frequencies for the transmission of synchronizing data. The use of frequency hopping provides high immunity to jamming and interference, reduced occurrence of multi-path phenomena, and allows for transmissions at a much higher output power than conventional fixed-frequency communications, to thus increase the effective range of the peripheral devices while providing effective and reliable two-way communications between the control panel and the peripheral devices. The invention also provides a large number of channels, which allows for actuators such as sirens, strobes and line seizing devices to be wireless in addition to sensors.

Abstract: In a security system, a method and apparatus for two-way frequency hopping communications between the control panel and each peripheral device which maintains channel synchronization through the assignment of fixed beacon frequencies for the transmission of synchronizing data. The use of frequency hopping provides high immunity to jamming and interference, reduced occurrence of multi-path phenomena, and allows for transmissions at a much higher output power than conventional fixed-frequency communications, to thus increase the effective range of the peripheral devices while providing effective and reliable two-way communications between the control panel and the peripheral devices. The invention also provides a large number of channels, which allows for actuators such as sirens, strobes and line seizing devices to be wireless in addition to sensors.

Abstract: A digital video security system comprises a video module and an event scheduling module for generating signals in response to at least one predefined event, such that the video module renders the video images in response to a signal generated by the event scheduling module. Predefined events include triggering events, such as motion detection, or a scheduled events, such as a preset date and time. Video images are recorded in a time-indexed file format, from which segments of footage may be extracted by reference to a database of time indices relating to the predefined events. Video images taken by the security system may be delivered in near real-time or at a later time using streaming technology. The security system is operable by either a host computer provided with a video camera or a remote computer, which are in communication over a network such as the Internet.

Abstract: A closed circuit television (CCTV) observation system accommodates a video feed from one or more wireless camera/transmitters to a single monitor, which also provides inputs for wired cameras. In the preferred embodiment wireless receivers are implemented into a multi-channel monitor, so that either wired or wireless cameras may be used, depending upon the user's surveillance requirements and the availability of cable pathways at the installation location. To reduce interference the wireless receiver is disposed on the back cover of the monitor offset from the electron beam generator of the monitor and generally parallel to an optical axis of the electron beam.