Infinity-Box settings.

Back view:
Box Power: set to UP position
USB port: connect to PC USB port

Front view:
F-Bus/M-Bus: set to UP position
connect cable to: USB out

Box pinout: left RJ45 (USB) FEMALE pinout. Connector pins up. From left to right:
2 = Tx
3 = Rx
7 = GND
8 = GND