At DFW for four of the five terminals, the airlines do thier own ramp control... What a mess <G>... They get them to spots on a WIDE apron just prior to the parallel taxiway where you wait and don't say a word. Ground will get to YOU and say something like MD80 spot 22. You then respond with AAL811 with lima. AAL811 roger, standard taxi runway 17R. We have published standard taxi routes... Works nicely...
regards