Understanding the circuit diagram on a filter
Funk-Entstörfilter = RFI suppression filter
Drossel = Choke

The lines connecting the top and bottom coils indicate that they're coupled, i.e. wound on the same core, often a toroidal core. The strange capacitor symbol indicates a double capacitor, 2400pF from either side to ground (you have to connect ground for the filter to work properly)

Note: the German word "Funk", meaning radio; refers to "spark" ("Funke"), which derives from the first wireless application: the telegraph.