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

    Default: [1...4095]    Value: Set of range (0-4095)

    Channel number ranges that define the LCNs that are available
    for calls on outgoing or two-way channels. Format the values to
    specify a set of channel number ranges. Each channel number is
    the concatenation of the logical channel group number and logical
    channel number of an SVC on the DTE.

    Example:

    set x25 protocol dte dte-1 outgoing list ([10..4095])