Adjusting The Volume; Mute - Avaya 140 User Manual

2.4 Adjusting the Volume

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.

2.5 Mute

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.
Quick Version 1400/9400/9500 Phone User Guide Page 26
IP Office Essential Edition - Issue 3b (23 February 2011)