Telephone, bus information

Bus message	Information	Transmitter	User	Description
Steering wheel button activated	PTT	CIM	UHP
	End call
	SET			Settings
	INF (arrow up)			Bluetooth
	INF (arrow down)			Bluetooth
Telephone data	SID	UHP	MIU	Text information and phone status
	Ring signal	UHP	MIU	EHU/IHU
	Mute of telephone microphone	CIM	UHP
	EHU/IHU	UHP	EHU	Telephone status is confirmed in the display
	Speaker sound	UHP	EHU