HVAC Communication TerminalsHVAC outdoor connection Connecting to the Echelon adapter Echelon U10 USB Network Interface (TP/FT-10) adapter is required for connecting to Fujitsu VRF. (Not supplied by CoolAutomation) Connect Echelon via USB extensions cable Connect the USB Extension cable (A-Male to A-Female) to the Echelon adapter. (Not supplied by CoolAutomation) Plug in to the CloudBox L8 Insert the USB cable in to the L8 USB host.