I am not aware of any place that this info is specifically published. I defined the classes in order to illustrate the fundamental technical differences between the two classes. The major confusion seems to be understanding that the TMCC style controller talks to the track interface unit wirelessly and then the track interface unit talks to the loco at a low RF frequency via the track. The direct to loco wireless systems (including the bluetooth variations) have the controller talking directly to the engines. Again, when properly implemented, both classes have the same basic operational capabilities.
