The electro-magnetic compatibility is a collective term for the effect of radio transmitters on organisms and technical systems. It relates to the ability of a device, networks (e.g. Local Area Networks) or systems to work properly within the electro-magnetic environment. The device itself must not cause any electro-magnetic failures that impair the functions of other systems, devices or networks. Examples: influencing communication lines through high-voltage systems, impacts of atmospheric discharges, system perpurtations, impacts of nuclear atmospheric discharges as well as switching operations with effects on electronic devices.