IR0UGN-8 is a PSKmail server on 10.148MHz (10.147 Dial). PSKmail is a narrow band arq system for use by amateur radio hams via short wave (HF) communication. It does not use a special controller, you just need a computer with a sound card
Pskmail is predestined for emergency communications. Even if the local internet is down, the long range on HF guarantees a connection to the internet. And it is child's play to set up an ad hoc server.