Library /sys$common/syshlp/nclhelp.hlb set, x25_protocol, dte, minimum_throughput_class  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Default: Supplied by   Value: Bounded by profile
    profile

    Minimum throughput class for any virtual circuit on the DTE. The
    value specified must be one of the following: 0, 75, 150, 300,
    600, 1200, 2400, 4800, 9600, 48000, or 64000. The value must be
    less than or equal to the value of the maximum throughput class
    characteristic.