Abstract: A dual communication-interface facility monitoring and management system, the system including a multiplicity of facility monitoring\management devices, the devices including at least one of at least one facility monitoring sensor and at least one facility management device, the facility monitoring sensors being operative to monitor at least a part of a facility, the facility management devices being operative to manage at last part of the facility, a facility communication gateway operative to facilitate electronic communication between a local area network (LAN) associated with the facility and an a wide area network (WAN) external to the facility, and a dual communication-interface facility monitoring and management subsystem operative to communicate with each of the multiplicity of devices via at least one of a first multiplicity of communication protocols and to communicate with the facility communication gateway via at least one of a second multiplicity of communication protocols.

Abstract: A motion detector system including first and second pairs of pyro-electric elements, electrical interconnections between the pyro-electric elements in the first pair providing a first signal output and local temperature compensation for the elements in the first pair, electrical interconnections between the elements in the second pair providing a second signal output and local temperature compensation for the pyro-electric elements in the second pair, wherein the compensation for the first pair is independent of the compensation for the second pair, a housing enclosing the two pairs of pyro-electric elements and defining a window, only one of the pyro-electric elements in each pair viewing a motion detection field of view through the window, and a signal processor receiving the first and second signal outputs and providing an output indication of crossing the field of view by an object having a temperature different from the ambient in the field of view.