A system is provided, wherein the system includes a fire alarm system within a secured area, a call station of the fire alarm system, and a cellphone that includes at least one fire detection device and that forms a cellular connection with the fire alarm system, wherein the fire alarm system determines a location of the cellphone based upon the cellular connection, and wherein the fire alarm system detects a fire within the secured area and provides instructions through the cellphone for exiting the secured area based upon the detected location of the cellphone.