Avaya 1416 User Reference page 4

Key Description
PHONE KEYS cont...
HEADSET - This key is used to answer and end calls using a headset connected to the phones headset
socket. The button is lit when you are connected to a call using the headset.
MUTE - This key can be used to mute your speech to the currently connected call. The button is lit
while mute is active.
SPEAKER - This key is used to answer and end calls using the phone's handsfree speaker and
microphone. The button is lit when you are connected to a call handsfree.
These keys have two roles:
• Appearance Keys - These button represent calls that you can make or receive.
• Feature Buttons - Those key not configured as appearance keys can be used for other functions.