Common vehicle telemetry services include Onstar, RESCU, OnCall, Assist, TeleAid and Command. All of these services use a combination of telecommunication and informatics, which provides information to a mobile source or car. Telematics systems often combine GPS, voice recognition and cellular technology with onboard electronics.

If you use vehicle telemetry to contact emergency services, miscommunication can occur, and the speed of the response may be slow due to the relay of your information from the service's operator to Emergency 9-1-1. It is important to be as clear as possible when providing your location and the nature of your emergency.

Vehicle telemetry operators are not certified Emergency 9-1-1 operators.