Avaya 9500 Series User Manual

While the phone is connected to a call you can adjust the volume. The volume that gets adjusted will depend on whether
you are using the handset, speakerphone or headset at the time you use this process.

1. Use the 

 up arrow and 

 down arrow keys to change the volume. 

While on a call, you can temporarily turn off the microphone so that the caller cannot hear you. You however will still be
able to hear the caller. 

To mute the microphone press the   Mute key. While mute is active, the button is lit.