A pneumatic tube system consists of several main components: The blower produces pressure or vacuum. The material is transported in properly matching carriers. The selection of the target and the input of the filled carriers is made at the stations. For connecting all stations in a tube-network diverters are used. With these diverters it is possible to transfer a carrier in the network to - for example - station 14 and at station 75 it will be discharged from the tube-network. For all this to work correctly, highly integrated controllers are used.