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.

See also Audio Modes.

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.

See also Audio Modes.

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.

See also Audio Modes.

You can adjust the volume level for the active mode by using the volume control. See also Adjust Volume.