Difference in how Consumer Data is Collected

Before eCall 

Before the eCall system to access owners vehicle data you had to plug into the vehicle. Vehicles were closed networks.

After eCall

All cars with a eCall device are connected to mobile carriers and government data centers. The eCall device is installed directly to the vehicles (EDR) Event-Data Recorder. When a set of pre-determined rules are broken, the car establishes a direct wireless data connection with the nearest Police Station or Government Data Center