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

    Default: No DTE        Value: DTE-address
    address

    DTE address to be associated with this entity for matching x25
    access security dte class remote dte entities for both incoming
    and outgoing calls. This characteristic is only supported if the
    characteristic type is bcug.