US Patent 9867022 Emergency services dual tone multi frequency (DTMF) function

A method and system for providing emergency location detection service for a vehicle is disclosed. The method and system comprise receiving one or more dual tone multi frequency (DTMF) signals by a vehicle via an active communication channel. The one or more DTMF signals are decoded and perform a corresponding vehicle function. A system and method in accordance with the present invention allows Public Safety Answering Point or 3rd party emergency service provider to send (DTMF) signals over a communication channel to activate vehicle system functions remotely such as engaging vehicle horn, flashing of headlights and/or taillights or emitting radio signals for the purpose of identification of location of the vehicle.