/sys$common/syshlp/helplib.hlb DECnet-Plus, DCL Commands, SET, HOST, /X29, Qualifiers, /THRUPUT_CLASS=number  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /NOTHRUPUT_CLASS

    (Default=/NOTHRUPUT_CLASS)

    Use this qualifier to request the specified throughput  class  in
    the call packet.