FAN (Field Area Networks) provide a communications infrastructure for very large-scale outdoor networks. In the same way you use the Internet on a smartphone or a computer, a Field Area Network lets industrial devices such as smart meters and streetlights interconnect onto one common network.
The FAN Certification Program has been developed by the Wi-SUN Alliance to certify devices for use by utilities, city developers and other service providers to simplify large-scale smart cities, smart utilities and other IoT rollouts.
Through FAN Certification, the Wi-SUN Alliance certifies products based on their compliance to a communications profile derived from open standards and their ability to interoperate with other Wi-SUN certified products.