I was never able to consistently read TCS, Lenz and NCE N-scale decoders with an original Zephyr, either direct from the command station, or with DecoderPro running on a Linux laptop connected with a LocoBuffer-USB. Tried the resistor trick, tried (and returned) a PowerPax. Digitrax decoders always read perfectly. Writes to TCS, Lenz and NCE decoders failed consistently from the command station, I had much better success with DecoderPro, likely because of retries. I have no idea if this is something Digitrax has improved in later models. Customer support from the decoder manufacturers blamed the command station, and Digitrax says the other decoders aren't following standards.
