The Site Controller is the communication interface for vacuum, self-serve, and vending activation. These accessory units are relay activated. The Site Controller is installed in your equipment room and communicates with the accessory units via WiFi or wired Ethernet connection. As with all Dencar equipment, the base operating system is Linux for maximum reliability in a commercial grade environment. (We do not run on Microsoft Windows) The Site Controller is managed out of the Customer Management Portal as part of Dencar’s cloud first strategy. This maintains control and visibility of every device as part of the Integrated Sales Experience. Only one Site Controller is needed per site to activate accessory units.