5.4 Audio settings
Under “Audio" you can set whether you want to use the speakers and microphone of your Mac, a desk phone or a connected headset for making calls.
To set the audio settings 
1 Click on Settings and select the tab Audio.
*Speaker and microphone
Specify which speaker and which microphone you want to use to make phone calls, e.g. on a Mac or a connected headset. Use the slider to adjust the desired volume.
*Ringtone
Select the desired ringtone and set the device for sound output.
For further information, please refer to Select a ringtone.
2 Use the slider to adjust the desired volume.
See also Using a headset.
Last modified date: 12.17.2021