Library /sys$common/syshlp/nclhelp.hlb set, x25_access, dte_class, security_dte_class  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Default: Default                     Value: simplename

    Name of the x25 access security dte class entity that controls
    inbound and outbound access using this DTE class.

    Example:

    set x25 access dte class dte-1 security dte class Default