Emergency GSM aerial

The emergency GSM aerial is secured to the storage shelf (can vary depending on vehicle type).

If the restraint systems are activated, the ACSM transmits a signal to the Combox. The control unit automatically initiates an emergency call, which also contains the location of the vehicle.

There is an aerial selector in the Combox (only where a CBX-ECALL is fitted). The aerial selector is used to switch over to the emergency GSM aerial if the GSM aerial in the roof-mounted aerial fails (e.g. due to an accident). Switch-over is carried out automatically if the GSM aerial in the roof-mounted aerial has poorer reception than the emergency GSM aerial.

If the vehicle is not fitted with a navigation system, the Combox emergency call is made via its own GPS module and its own connection to the GPS aerial. If the vehicle is fitted with a navigation system, the Combox emergency call is made from the headunit with the position data.

During an emergency call, the data is transferred to a server and stored. The data can be used by the service provider for initiating the rescue measures.

Fig 1: Identifying Emergency GSM Aerial And Aerial Output

Courtesy of BMW OF NORTH AMERICA, INC.