Whether you are using Leica Geo Office (LGO), Leica Infinity, Survey Office, or free utilities like GSI Data Transfer , configure the download job with the exact same parameters:
If you use a standard RS232 cable plugged into a cheap USB adapter, the driver comes from the adapter manufacturer, not Leica. LEICA TC 407 driver
Connects the instrument to a standard 9-pin RS232 serial port. Whether you are using Leica Geo Office (LGO),