To quickly test the new Märklin LokDecoder3 and Märklin SoundDecoder3 as well as all other decoders using the following interfaces: NEM 651, NEM 652, MTC14, MTC21 and PluX22. Other decoders, such as for ladder 1, LGB or with individual cables, must be connected via screw terminals. The rest of the equipment includes : - LED monitoring for the lantern, for Aux 1 to 6, channel input, Aux 3 and 4 reinforced or not. - track connection for digital control unit - loudspeaker - motor - separate connection terminals for another motor - direct connection to Märklin decoder programmer