The hot-swappable Controller Card connects the router to an external Linux or Windows CPU. The serial port can also be used for 3rd party controller integration (such as Creston, AMX or home-spun interfaces.) Also, the X4 Configurator Software can be used to control the router via the LAN port.
If a HDX router is to be controlled via Ethernet, it will require a static IP address. This value can be set via the DIP switch to the values listed below. The factory default setting will be 192.168.13.15