GF82.95-P-2022CEU Voice Connection Between Vehicle and Service Center, Function

GF82.95-P-2022CEU Voice Connection Between Vehicle And Service Center, Function
- with CODE (359) TELE AID emergency call system

Function requirements, general
^ Circuit 30 or Circuit 15R
^ Telematic Alarm Identification on Demand (emergency call system) (TELE AID) system authorized and operating error-free
^ Each vehicle-related service is authorized separately
^ An emergency call system control unit (N123/4) communication module authorized for the corresponding vehicle-related service is configured ex-factory with the telephone number of the corresponding service provider
^ The customer is registered and authorized at the service center
^ A mobile telephone network available in adequate strength and quality
^ One of the following vehicle-related services is present:
- Manual or automatic emergency call (E-Call)
- MB-Info call
- Breakdown assistance (Roadside Assistance)
- Vehicle tracking

Depending on the equipment installed one of the following control units will be installed, referred in the following text as audio equipment:
- Radio (A2)
(with code (523) Radio MB Audio 20 or code (510) Audio 20 incl. CD changer)
- COMAND control unit (A40/3)
(with code (512) COMAND APS incl. DVD changer or code (528) COMAND incl. DVD changer)

Voice connection between vehicle and service center, general
Regardless of the type of vehicle-related service initiated (e.g. MB Info call), a voice connection is established to the service center. After feedback by the service center with a special tone, an SMS is sent to the service center with the appropriate data (e.g. vehicle identification number (VIN) and vehicle model). Then the customer can speak to a service receptionist over the existing voice connection.

Function sequence for voice connection between vehicle and service center
The voice control system microphone (B25/7) is used for voice commands; it is integrated into the inside rearview mirror (A67). The signals of the voice control system microphone are relayed via a direct line to the audio equipment. The audio equipment then loops through and forwards them, via a direct line, to the communication module integrated into the emergency call system control unit.

The communication module integrated into the emergency call system control unit then transmits the voice control system microphone signals to the service center. The communication module integrated into the emergency call system control unit transmits and receives the mobile phone signals or data in the following way:
- Direct line
- Frequency switchover control unit (N96) (with code (389) Mobile phone preinstallation with universal interface, USA/Canada, and direct line
- Multifunction antenna (A28/11)

Voice output takes place exclusively via the center dashboard speaker (H4/27). This speaker is controlled by the emergency call system control unit over discrete lines.
At the same time, the emergency call system control unit in vehicles with code (810) Sound system sends a mute signal via a direct line to the sound system amplifier control unit (N40/3) to mute all of the speakers connected.

For vehicles without code (810) Sound system, the emergency call system control unit sends a mute signal via a direct line to the "audio equipment" to mute all of the speakers connected:

Normally, the voice connection is deactivated by the service center or by the customer.

The establishment of a voice connection to the service center is interrupted by the communication module integrated into the emergency call system control unit after several unsuccessful dialing attempts.
In the event of a malfunction in the multifunction antenna (e.g. defective because of a rollover), the communication module integrated into the emergency call system control unit automatically sends and receives the mobile phone signals and data via the emergency call system antenna (A2/52).