A traction device for a dual wheel set. The present invention utilizes a method of imploding an initiating explosive onto the munition device whereby the munition device is exploded. In a flow control unit there is an estimate or measure determining unit for determining for each of the data flows, at the ends of first time periods having a predetermined first length, an estimate of or a measure representing the total number of received data frames that have been faulty during the first time period. The number of changeover operations of the amplifier is considerably reduced and thus the detection time is shortened. Further, window element activity may include use of the window element, adjustments to the transparency of the window element representation or current resource usage associated with the window element.