Telephone (GSM), function - GF82.70-P-0003RA: Notes

MODEL 230 

with CODE (853) MB standard cellular telephone 

with CODE (854) MB portable cellular telephone 

Portable cellular telephone, function 

A call can be completed in a number of ways (multifunction steering wheel, voice control system). This assumes that the system is ready for operation after entering the PIN and logging in (switched on). If the telephone is not required, it goes to the stand-by mode. The telephone is switched on and off  by the vehicle head unit (COMAND, radio).

The portable cellular telephone is connected to the vehicle optical data bus (D2B) just as is the head unit.

Physical connection is accomplished via an adapter, the telephone interface (A34/4). 

Incoming and outgoing calls are transmitted and received by the telephone antenna (A2/22). 

It is possible to use the vehicle hands-free system for making calls, which increases driving safety. The voice connection is completed via the hands-free system microphone (B25)  and the hands-free system loudspeaker  (voice output via the entire loudspeaker system), the portable cellular telephone remains in the cradle.

Here, the displays (portable cellular telephone, instrument cluster, COMAND, radio) provide a series of information for the user regarding the telephone operating state (e.g. menu selection). The volume of the portable cellular telephone loudspeaker and of the hands-free system can be adjusted individually by the user at the portable cellular telephone or with the multifunction steering wheel.

The volume of any audio source switched on (radio, COMAND) is automatically reduced during a telephone conversation to ensure the maximum fidelity for the user over the hands-free system microphone.

It is possible for the user to change back and forth between the networks (D-network or E-network). This is made possible by installation of a compensator (A28/3). 

Additional information is contained in the applicable operating instructions.

	Telephone (D-network), Arrangement of components		GF82.70-P-0003-01R
	Telephone (D-network) block diagram		GF82.70-P-0003-06R
	Telephone (D-network), function schematic		GF82.70-P-0003-02R
	Switching on/off, function		GF82.70-P-2005R
	Telephone interface, location/purpose/design/function		GF82.70-P-3107R
	Compensator, location/purpose		GF82.70-P-3109R
	Hands-free microphone, location/purpose		GF82.70-P-4102R
	Hands-free system loudspeaker, location/purpose		GF82.70-P-4103R
	Telephone antenna, location/purpose		GF82.62-P-4105R
	Antenna splitter (D-network), location/purpose		GF82.70-P-4109R
	Portable cellular telephone (D-network), location/purpose		GF82.70-P-4110R