*** For DStar REPEATER: In your DStar radio, connect to your local repeater in your usual manner. Then , link to our reflector by setting URCALL to XLX915BL (or XRF915BL or DCS915BL, you get the picture) and key up. Once you get confirmation, just start talking. You are connected to Brandmeister TG 31425, PA Cross-Mode! That's all there is to it!
For your HotSpot: I only know Pi-Star method, but I assume they all are similar. In your configuration for DStar, choose XRF915 Module B or DCS915 Module B as where you want to connect to, hit APPLY and you should link within a few seconds. Once connected, just use your normal radio connection to the Hotspot to talk and you are GOLDEN!!