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Phone call acceptance, function - GF82.70-P-2009CWJ

MODEL 204.0 /2 with CODE (498) Japan version up to model year 08/YoM 07 

Function requirements 

IMPORTANT The connector is used to connect the various mobile phones to the communication control unit.

IMPORTANT A Bluetooth-compatible mobile phone can only be operated in the vehicle if a mobile phone is not connected to the connector.

IMPORTANT The function is described with a mobile phone attached to the connector. Any differences with a mobile phone not attached to the connector and one operated using Bluetooth are described as information points in each respective component function.

General 

The mobile phone can be used by the user to initiate or terminate a telephone call to another person in the cellular telephone system network or the fixed-line network.

The accept call function consists of the following component functions:

Operating instruction 

Acceptance, refusal or toggling of a call using the following options:

Function sequence, call signal 

The mobile phone receives a call signal over the discrete line and the connector from the multifunction antenna (A28/11). The caller is shown on the display of the mobile phone and the information is forwarded simultaneously in the following way to the COMAND controller unit:

The COMAND controller unit sends the call tone for vehicles with code (810) Sound system over the Media Oriented System Transport (MOST) to the sound system amplifier control unit (N40/3).

From there, the call tone is transmitted via discrete lines to the following speakers:

At the same time the COMAND controller unit reduces the volume of the currently active audio source (e.g. the radio) by 15 dB. The currently active audio source is not muted until the caller accepts the call (MUTE). The call identification display is generated by the COMAND controller unit over a low voltage differential signaling (LVDS) line on the Audio/COMAND display (A40/8). The call identification is also shown over the interior CAN on the multifunction display (A1p13) in the instrument cluster (A1).

IMPORTANT A mobile phone not connected to the connector and operated over Bluetooth receives the call signal over the mobile phone's antenna. The call signal is then forwarded to the COMAND controller unit in the following way:

Function sequence, accept call over mobile phone buttons 

Pressing the "Accept call" button on the mobile phone serves to accept the call in handsfree mode. The control signals of the mobile phone buttons are internally processed and forwarded in the following way to the COMAND controller unit:

Accept call function sequence over phone buttons on the COMAND controller unit 

Pressing the "Accept call" button on the COMAND controller unit serves to accept the call in handsfree mode. The control signals from the COMAND controller unit telephone buttons are processed internally.

Accept call function sequence over Audio/COMAND control panel 

Through the call signal, the call identification is sent by the COMAND controller unit over a low voltage differential signal line to the Audio/COMAND display.

Selecting the "Accept call" function using the Audio/COMAND control panel serves to accept the call in handsfree mode. The control signals from the Audio/COMAND control panel are forwarded over the telematics CAN to the COMAND controller unit.

Accept call function sequence over multifunction steering wheel button groups 

The call is accepted in handsfree mode by pressing the accept/ terminate phone call button (S111s3) in the corresponding panel. The control signal of the accept/terminate phone call button are forwarded over the following components to the COMAND controller unit:

Function sequence, telephone call in hands-free mode 

After the telephone call has been accepted, the COMAND controller unit receives or transmits the mobile phone signals or data in the following way:

The voice commands in handsfree mode are recorded by the voice control system microphone (B25/7) and forwarded over a discrete line straight to the COMAND controller unit.

The voice signals are forwarded by the COMAND controller unit for vehicles with code (810) Sound system via the MOST to the sound system amplifier control unit. From there, the voice signals are transmitted via discrete lines to the following speakers:

IMPORTANT Generally, after accepting the call the telephone connection is established in handsfree mode, irrespective of whether the mobile phone is connected to the connector or operated over Bluetooth.

If, after the telephone connection has been established in handsfree mode, a mobile phone attached to the connector is disconnected and thus detached from the COMAND controller unit, the telephone call is then conducted in "private mode". If the mobile phone is reattached to the connector during a telephone call, the telephone call is then conducted in the handsfree mode again.

On a mobile phone not connected to the connector and operated over Bluetooth, a change can then be made to "private mode" following acceptance of the telephone call in handsfree mode by activating the "private mode" menu item via the Audio/COMAND control panel and the Audio/ COMAND display.

IMPORTANT When in "private mode" the user can make a telephone call without other vehicle occupants being able to hear the conversation.

Function sequence, reject call over mobile phone buttons 

Pressing the "End" button on the mobile phone rejects the call. The control signals of the mobile phone buttons are internally processed and forwarded in the following way to the COMAND controller unit:

IMPORTANT On a mobile phone not connected to the connector and operated over Bluetooth, the control signals are internally processed by the mobile phone buttons and forwarded to the COMAND controller unit in the following way.

Reject call function sequence over phone buttons on the COMAND controller unit 

Pressing the "End" button on the COMAND controller unit once puts the call on hold. Pressing the "End" button on the COMAND controller unit twice rejects the call. The control signals from the COMAND controller unit telephone buttons are processed internally.

Reject call function sequence over Audio/COMAND control panel 

Through the call signal, the call identification is sent by the COMAND controller unit over a low voltage differential signal line to the Audio/COMAND display.

By selecting the "Reject" function the call is then rejected. The control signals from the Audio/COMAND control panel are forwarded over the telematics CAN to the COMAND controller unit.

Reject call function sequence over multifunction steering wheel button groups 

Pressing the accept/terminate phone call button in the corresponding subfield rejects the call.

The control signal of the accept/terminate phone call button are forwarded over the following components to the COMAND controller unit:

Toggle call function sequence over phone buttons on the COMAND controller unit 

If another call signal is received during a telephone call then it is displayed by the COMAND controller unit over a low voltage differential signal line on the Audio/COMAND display. The telephone call can now be accepted or rejected using the telephone buttons on the COMAND controller unit. The control signals from the COMAND controller unit telephone buttons are processed internally.

If the incoming call is accepted, it is activated in the hands-free mode and the existing call is put on hold. If the incoming call is rejected, the existing call remains active in the hands-free mode.

Toggle call function sequence over Audio/COMAND control panel 

If another call signal is received during a telephone call then it is displayed by the COMAND controller unit over a low voltage differential signal line on the Audio/COMAND display.

The telephone call can now be accepted or rejected via the Audio/ COMAND controller unit. The control signals from the Audio/ COMAND control panel are forwarded over the telematics CAN to the COMAND controller unit. If the incoming call is accepted, it is activated in the hands-free mode and the existing call is put on hold. If the incoming call is rejected, the existing call remains active in the hands-free mode.

Toggle call function sequence over multifunction steering wheel button groups 

If another call signal is received during a telephone call then it is displayed by the COMAND controller unit over a low voltage differential signal line on the Audio/COMAND display. By pressing the accept/terminate phone call button in the corresponding subfield, the call can be accepted or rejected. The control signal of the accept/terminate phone call button are forwarded over the following components to the COMAND controller unit:

If the incoming call is accepted, it is activated in the hands-free mode and the existing call is put on hold. If the incoming call is rejected, the existing call remains active in the hands-free mode.

REFER TO SYSTEM WIRING DIAGRAMS Electrical function schematic for switch on/off characteristics, establishing, accepting and ending calls   PE82.70-P-2056-99FAA
  Front central operating unit, component description A40/9 GF54.21-P-4500CW
  Cockpit central display, component description A40/8
High		 GF54.30-P-6100CWH
  Telephone and GPS roof antenna component description A28/11 GF82.62-P-4119CW 
  Bluetooth antenna, component description A2/91 GF82.62-P-4201CW 
  Speaker system, component description H4/1, H4/2, H4/3, H4/4, H4/27 Except code (810) Sound system GF82.62-P-4220CW 
H4/1, H4/2, H4/3, H4/4, H4/27, H4/29, H4/54, H4/57 with CODE (810) Sound system GF82.62-P-4220CWS 
  Hands-free system microphone, component description B25/7 GF82.70-P-4121CW 
  Audio tuner control unit, component description N40/3
with CODE (810) Sound system		 GF82.62-P-3132CWS 
  Communication control unit, component description N123/6 GF82.70-P-5003CWJ 
  Mobile phone interface, component description X39/37 GF82.70-P-5004CWJ 
  COMAND controller unit, component description A40/3 GF82.85-P-3136CWJ
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