Symbol | Function | Explanation |
 | Headset | This function key allows you to initiate a call (or pick up an incoming call) in "Headset" audio mode. You can switch to "Headset" mode during a call. |
 | Handset | This function key allows you to initiate a call (or pick up an incoming call) in "Handset" audio mode. You can switch to "Handset" mode during a call. |
 | Hands-free | This function key allows you to initiate a call (or pick up an incoming call) in "Handsfree" audio mode. You can switch to "Handsfree" mode during a call. |
Volume control  | You can adjust the volume level for the active mode by using the volume control.For further information please refer to chapter Adjust Volume. | |