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

    Default: (1-4095)      Value: Set of range (1-4095)
    ranges

    Channel number ranges that define the Logical Channel Numbers
    (LCNs) that are available for calls on incoming or bothway
    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 incoming list ([10..4095])