# Tools - QA calibration

External tool configuration

Option | Function
Enable | ON: Enables the external tool configuration option OFF: Disables the external tool configuration option.
Virtual station | Connect the relevant Virtual station.
Connection type | Connect via TCP port or Connect via COM port.
TCP port | Visible when Connection type TCP port is selected. Shows the TCP port, pre-populated.
COM port | Visible when Connection type COM port is selected. Shows a drop-down list with the available COM ports.