[enter] - with this you connect all parties in one conference call
	[X][enter] - you choose one participant from the conference call for a private conversation
	[X] - call the number of the selected participant
	[enter] - return to the conference call with all participants
	[X][enter] - you end the call with one participant of the conference call
	[X] - call the number of the selected participant

If you want to end all calls, press the end call button [END]