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

GF82.95-P-3212SXR Emergency Call System Control Unit, Component Description
- Model 221
- with CODE (389) Mobile phone preinstallation with universal interface, USA/Canada

Component Identification:

Location
The emergency call system control unit is located in the luggage compartment at the left front at the rear wall.

Task
The emergency call system control unit is responsible for the following functions:
^ Integrated telephone module for Telematic Alarm Identification on Demand (emergency call system) (TELE AID) emergency call, MB-Info call and telediagnosis call
^ Independent position sensing
^ Acquiring and storing vehicle-specific data (e.g. circuit status)
^ Actuation of telephone and GPS roof antenna (A2/49) (on model 221) or of the telephone and GPS antenna (A2/49) (on model 216), over the frequency switchover control unit (N96), or actuation of the backup antennas, consisting of the emergency call system left backup antenna (A2/54) and the emergency call system right backup antenna (A2/55), over the emergency call system antenna splitter (A2/25)
^ Voice output over the center cockpit center speaker (centerfill) (H4/27)
^ Input of crash data from the restraint systems control unit (N2/7) via a discrete line
^ Vehicle remote door unlocking
^ Vehicle remote door locking
^ Reading in the SOS pushbutton switch (S93/3) and MB-Info and telediagnosis button group (S93/6) over 2 separate and discreet lines
^ Satellite data from the telephone and GPS roof antenna (on model 221) or from the telephone and GPS antenna (on model 216), over the antenna splitter
^ Generating and keeping an SMS ready
^ Muting other audio signals (e.g. radio, navigation)

Design
The emergency call system control unit is designed primarily as follows:
^ Integrated telephone module
^ Integrated navigation module
^ Integrated additional battery
^ Memory for vehicle-specific data
^ Screened metal housing

Function
The emergency call system control unit has its own microprocessor. It also has 2 sub-units, a telephone module and a navigation module. All the relevant data for a TELE AID emergency call are processed centrally in the emergency call system control unit. The emergency call system control unit calculates the vehicle position with the aid of the installed navigation module and generates a TELE AID emergency call telegram in the form of an SMS in the event of a TELE AID emergency call.
The crash data are received from the restraint systems control unit via a discrete serial interface.

The emergency call system control unit can be diagnosed over a diagnosis CAN through the central gateway control unit (N93) using STAR DIAGNOSIS.