GF82.95-P-3212RIU Emergency Call System Control Unit, Component Description

GF82.95-P-3212RIU Emergency Call System Control Unit, Component Description
- with CODE (359) TELE AID emergency call system

Component Identification:

Location
The emergency call system control unit is located on an equipment carrier below the stowage compartment of the armrest in the center console.

Task
^ Realization of vehicle-related services
^ Priority control through integrated priority management
^ Communication management between vehicle and service center
^ Forwarding vehicle position and identification as well as other required data to the service center
^ Audio management
^ Display management
^ Treatment of fault
^ Receiving signals
^ Transmitting signals

Realization of vehicle-related services
- Realization of following vehicle-related services:
- Authorization (Provisioning)
- Emergency call (E-Call) manual or automatic, including police emergency call number "911"
- MB-Info call
- Breakdown assistance (Roadside Assistance)
- Vehicle tracking
- Vehicle remote door unlock

Priority control through integrated priority management

Priority Service
1 Automatic alarm call
2 Manual emergency call
3 Vehicle tracking
4 Roadside assistance
5 MB information call
6 Authorization
7 Vehicle remote unlocking

Communication management between vehicle and service center
- Communication management between the vehicle and the service center via the integrated communication module with Network Access Device (NAD) control and the country specific mobile telephone network
- If necessary, the forwarding of information to the customer

Forwarding vehicle position and identification as well as other required data to the service center
- Forwarding vehicle position and identification as well as other required data to the service center after activation by the following actions:
- Crash signal from restraint systems control unit (N2/7), for automatic emergency call
- Actuation of SOS pushbutton switch (S93/3), for manual emergency call
- Actuation of MB-Info button (S93/6s1), for MB-Info call
- Actuation of breakdown assistance button (S93/6s2), for breakdown assistance
- Call to service center and actuation of trunk lid external operation switch (S88/8), for vehicle remote door unlock
- Call to service center and reporting of theft for vehicle tracking

Audio management
- Issuance of audio signals via following speakers:
- Center cockpit speaker (centerfill) (H4/27)
- Left front emergency call speaker (H4/46)
- Right front emergency call speaker (H4/47)

- Audio muting

Display management
- Display management on display of COMAND operating, display and controller unit (A40/3), in the instrument cluster (A1), in the SOS pushbutton switch, in the MB-Info button and the breakdown assistance button

Treatment of fault
After activation of circuit 15R, the emergency call system control unit performs a self-test (for approx. t = 3.5 s). If the self-test is successful, the emergency call system is then ready for operation. In the event of a fault, a fault message is displayed on the instrument cluster, depending on the type of fault and the two red light-emitting diodes (LEDs) in the SOS pushbutton switch are actuated continuously. Depending on the fault type, the fault is also stored in the emergency call system control unit's memory

Receiving signals
^ Direct lines
^ Controller Area Network (data bus/CAN bus) (CAN)

Direct lines
- Power supply via circuit 30 and circuit 31g over one discrete line each - Status signal circuit 15R over discrete line
- SOS pushbutton switch over discrete line
- MB-Info button signal over discrete line
- Breakdown assistance button signal over discrete line
- Crash signal from restraint system control unit over discrete line
- Signal from hands-free system microphone (B25) over the COMAND operating, display and controller unit and direct line
- Mobile phone signals or data from the telephone antenna (A2/22) over the frequency switchover control unit (N96), with code (389) Mobile phone preinstallation with universal interface, USA/Canada, and a coaxial cable
- Global Positioning System (GPS) signals from the GPS antenna (A2/23) over the antenna splitter (A2/5) and direct line
- Mobile phone signals or data from the TELE AID backup antenna (A2/50) over a direct line

CAN
- Diagnosis CAN low
- Diagnosis CAN-High

Transmitting signals

Discrete lines
- Voice output through following speakers over a direct line each:
- Center cockpit speaker (centerfill)
- Left front emergency call speaker
- Right front emergency call speaker
- Actuation signal for LED in SOS pushbutton switch over discrete line
- Actuation signal for LED in MB-Info button switch over discrete line
- Actuation signal for LED in breakdown assistance button over direct line
- Audio muting (MUTE) over discrete line:
- Amplifier for sound system (N40/3)
- Mobile phone signals or data to the telephone antenna over the frequency switchover control unit, with code (389) Mobile phone preinstallation with universal interface, USA/ Canada, and a coaxial cable
- Wake-up signal to COMAND operating, display and controller unit
- Mobile phone signals and data to TELE AID backup antenna

Design
- Integrated communication module with NAD
- Integrated locating module
- Integrated GPS receiver for position finding (Date, time, history and last known location) for listed vehicle-related services
- Memory for vehicle-specific data
- Shielded metal housing

Function
The emergency call system control unit has its own microprocessor. Here a differentiation is made between the 2 subareas communication module with NAD and position finding module. The emergency call system control unit centrally processes all the vital data for the listed vehicle-related services.

The emergency call system control unit uses the installed locating module to calculate the vehicle position and generates a data telegram in the form of an SMS when one of the following vehicle- related services has been activated:
- Manual or automatic emergency call, including police emergency call number "911"
- MB-Info call
- Breakdown assistance
- Vehicle remote door unlock

Communication module with NAD
The communication module with NAD integrated into the emergency call system control unit is a mobile phone transceiver enabling voice and data communication with the service center over mobile phone frequencies. This supports communication via the two American mobile telephone networks: the analog Advanced Mobile Phone Service (AMPS) network and the digital Code Division Multiple Access (CDMA) network. For data communication in the AMPS network, the communication module with NAD is also equipped with a modem.

Listed below are the properties of the AMPS and CDMA networks:
- CDMA Class 3, 800 MHz with 0.2 W transmitting power
- CDMA Class 2, 1900 MHz with 0.1 W transmitting power
- AMPS 800 MHz
- SMS

Additional communication module with NAD functions are:
- 4 day transmission and reception capability, as soon as an SMS is received, the emergency call system control unit is activated (wake-up); after 4 days the emergency call system reverts to the "sleep mode"
- Following activation a self-diagnosis is performed and the result sent to the "controller"

In the event of failure of the telephone antenna (e.g. defective due to rollover), the emergency call system control unit automatically uses the TELE AID backup antenna for reception and transmission of the mobile phone signals and data.