sentences:  EBS also supports trailers and communicates between the towing vehicle and trailer using the ISO 11992 protocol.The communication between trailer and towing vehicle shall be done through a specific connector dedicated to ABS/EBS following either ISO 7638-1 for 24V systems or ISO 7638-2 for 12V systems.EBS still relies on compressed air for braking and is only controlling the air through valves which means that it is not depending on higher voltages used by the electromechanical or electrohydraulical brake systems where electric power also is used to apply the brake pressure.