Telephone mode, function

A35/11

A34/6

A2/6

A2/13

B25

A2/49a1

A59/1

X11/4

A1

N80

MFL

CAN-B

D2B

Diagnosis

CC drive

Radio tuner

Navigation computer

Central computer and graphics signal processing

Navigation CD drive

A40/3

Audio signal processing

A35/8

Valid up to 31.8.02

Block diagram for COMAND telephone system, shown on model 220 with the following equipment:

 Code (810) Sound system

 Code (813) Voice control system (VCS)

D2B Digital data bus

MFL Multifunction steering wheel

A1 Instrument cluster

A40/3 COMAND operating, display and control unit

A59/1 Portable CTEL D2B interface

B25 Hands-free system microphone

N80 Steering column module

X11/4 Data link connector

A2/6 CD player with changer (in trunk)

A2/13 Sound amplifier

A2/49a1 Telephone antenna

A34/6 Portable CTEL

A35/11 Voice control system control unit

 On vehicles as of 1.9.03, all audio signals of the audio components, voice signals as well as the signals of the navigation processor (N41/1) are transmitted via the Media Oriented System Transport (MOST).

 On vehicles as of 1.9.03, the navigation processor (N41/1) is installed as a separate control unit in the left of the engine compartment.

 On vehicles as of 1.9.03, the audio gateway control unit (N93/1) is also installed as an interface between the Controller Area Network bus class B (interior) (CAN-B) and the MOST. The audio signals are then sent to the audio gateway control unit (N93/1) and output via the vehicle speakers.

The telephone system can be operated directly at the COMAND operating, display and control unit (A40/3n1) on the multifunction steering wheel (MFL) in combination with the multifunction display (A1p13) of the instrument cluster (A1) or via voice command (optional).

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Making a call, function

The data telegrams (e.g. dial telephone number) for operating the telephone system are forwarded from the COMAND operating, display and control unit (A40/3n1) over the Digital Data Bus (D2B) to the portable CTEL D2B interface (A59/1).

The portable CTEL D2B interface (A59/1) transmits the data telegrams via a separate interface to the portable CTEL (A34/6). The actual telephone connection is made over the portable CTEL (A34/6) and the telephone antenna (A2/49a1) (on model 220) or the telephone antenna (A2/22) (on model 215).

The telephone antenna (A2/49a1) (on model 220) and the telephone antenna (A2/22) (on model 215) are each connected to the E-call control unit (A35/8).

If required, a high frequency relay integrated in the E-call control unit (A35/8) connects the telephone antenna (A2/49a1) (on model 220) or the telephone antenna (A2/22) (on model 215) to the portable CTEL (A34/6).

Handsfree conversation, function

The driver's voice is converted by the handsfree system microphone (B25) into a digital signal and sent by the portable CTEL D2B interface (A59/1) to the portable CTEL (A34/6).

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The voice signals of the party called are forwarded by the portable CTEL D2B interface (A59/1) to the Digital Data Bus (D2B) and received by the audio component of the COMAND operating, display and control unit (A40/3). There the signals are amplified and output via the vehicle speakers.

 The US vehicles are prepared for installation of Motorola TDMA, CDMA (V60) or GSM portable CTELs (V60i).

 During a telephone call the audio signal is automatically muted.

 If the vehicle is equipped with code (810) Sound system, the voice signals are picked up by the sound amplifier (A2/13), amplified and then output via the vehicle speakers.

The COMAND operating, display and control unit (A40/3) has the following telephone functions:

 Direct dialing of a telephone number via the rotary switch or the numerical keypad, display of the name of the person called (provided that the entered number is known).

 Speed dialing takes place by dialing the first 10 memory locations with only one key, dialing all further memory locations takes place by entering the 3-digit memory location number.

 Locking the telephone system

 Ability to sort the memory locations according to:

Memory location number

-Names

-The 10 numbers last dialed