This frequently complicates matters, first of all because zaphfc. In addition, there are also some other modules that can conflict with the required Zaptel modules: Two things can be done to fix these problems. First, simply delete the buggy zaphfc module Conceptronic C128iR Network Adapter ensure that only the correct one is used: Zaptel config At this point it is safe to run a Conceptronic C128iR Network Adapter that will both re load the correct Zaptel modules for the HFC-S[…]