Abstract: A portable transponder device including a receiver having an input frequency range of either but not both of 20 kHz-300 kHz and 3 MHz-30 MHz, the receiver having a plurality of signal input channels, the input frequency range not including an infra-red frequency range, and infra-red frequency range receiving circuitry receiving infra-red frequency range signals modulated by at least one signal in the input frequency range, and providing the infra-red frequency range signals to the receiver through at least one signal input channel of the plurality of signal input channels.

Abstract: A portable transponder device including a receiver having an input frequency range of either but not both of 20 kHz-300 kHz and 3 MHz-30 MHz, the receiver having a plurality of signal input channels, the input frequency range not including an infra-red frequency range, and infra-red frequency range receiving circuitry receiving infra-red frequency range signals modulated by at least one signal in the input frequency range, and providing the infra-red frequency range signals to the receiver through at least one signal input channel of the plurality of signal input channels.

Abstract: A combined motion detection and access control method and system, the system including a processor for receiving an indication of motion detection within a premises and for ascertaining an area within which the motion was detected; at least one transmitter operable, responsive to receiving, from the processor, an indication of the area, for broadcasting, within the area, an encoded identification of the area; a transceiver associated with an individual and operable for receiving the encoded area identification and, responsive thereto, for broadcasting an encoded identification of the individual and the encoded area identification; and at least one receiver operable for receiving the encoded identification of the individual and the encoded area identification and for communicating the encoded identification of the individual and the encoded area identification to the processor which is operable, thereto, for ascertaining whether the individual is allowed access to the area encoded in the encoded area identific

Abstract: A combined motion detection and access control method and system, the system including a processor for receiving an indication of motion detection within a premises and for ascertaining an area within which the motion was detected; at least one transmitter operable, responsive to receiving, from the processor, an indication of the area, for broadcasting, within the area, an encoded identification of the area; a transceiver associated with an individual and operable for receiving the encoded area identification and, responsive thereto, for broadcasting an encoded identification of the individual and the encoded area identification; and at least one receiver operable for receiving the encoded identification of the individual and the encoded area identification and for communicating the encoded identification of the individual and the encoded area identification to the processor which is operable, thereto, for ascertaining whether the individual is allowed access to the area encoded in the encoded area identific