Perhaps because you jumped in the middle of another thread. Try a new topic and see if you can get better replies. The short answer is it's not the length of the wires, but rather the difference in the propagation of TMCC or DCC signals vs. DCS signals. The frequency of DCS is 3.27mhz, and the wavelength is much shorter than either TMCC or even DCC signals. This means that loops created by the track and multiple bus drops can create standing waves and garble the DCS commands.
