You can select to have internal calls automatically connected if you are not already on a call. The phone connects the call after a brief tone, using either the phone's speaker or the headset as set by the phone's audio path setting (see Default Handsfree Audio Path).

You can assign this function to a feature button using the Auto Answer action. You can then use the button to turn auto-answer on/off. The button lamp indicates when auto answer is on. See Programmable Feature Buttons.