Well, that was a nice first try on the dispatching side of things. Tried an electronic signal box and was able to set and revoke all kinds of routes. But no trains came by. Then I tried a mosiac panel (lazy Lc) and got all moveable trains running through. Note that you must set the switches correctly first, before attempting a route with the signal button at the start. From there, it went smooth and train nicely passed by with proper sounds and illumination of the panel.
One train was stuck (well, it lit red on the panel for occupied track. Not sure if it was a train)
I received a question from Dąbrowa Górnicza Ząbkowice station, whether or not the "train 245021 on track 4 is clear", but was unable to answer. Tried "yes" and "tak"... but the send button didn't do anything.