EXFO FTB-200 v2 Compact Modular Platform - Manual (Page 57)

Setting Up Your Unit
Compact Modular Platform 47
Adjusting Microphone and Speaker Volume
4. Under Device volume, use the slider to adjust the sound of your
speaker.
Note: You can also select the Mute check box if you want to quickly turn off the
sound.
Note: You can tap the Advanced button if you want to refine the volume
according to the source of the sound (Master Volume and Wave controls).
5. Tap OK to return to the Control Panel window.