Do you have a D-RATS software repeater setup and running?
Is each of the stations in your "network" running D-RATS on their own computers and have their computers connected to their Icom radios through a serial/USB cable?
D-RATS can used over the internet, through RF over D-STAR radios and a combination of both but you first need a D-RATS ?software repeater up and running.
Keith
kc2oon