The IF-4072 controller checks the booking data from Interflex terminals and transfers it to the host system in real time. The controller is easy to install and is suitable for DIN rail mounting. When installed in a secure area, it is protected against sabotage and tampering. It can be integrated into an Ethernet network and can be operated over the internet thanks to asymmetric PKI encryption. Power is supplied via Power-over-Ethernet (PoE), low voltage or a separate power supply unit. If the host system is offline, the controller works locally, since it stores all data that are needed for offline operation. The IF-4072 is available in four versions: for two, four, eight or 16 terminals.