EXFO FTB-2 - Manual (Page 171)

Managing Data
FTB-2 and FTB-2 Pro 161
Enabling or Disabling the Wireless Communication
4. Set the wireless communication parameters as needed.

If you want to set the parameters for the Wi-Fi device and the 3G
USB key at the same time, set the Airplane mode slider to the Off
position to enable the communication, or to the On position to
disable it.

If you want to set the parameters for the Wi-Fi device only, set the Wi-Fi
slider to the On position to enable the communication, or to the Off
position to disable it.