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

    Default: No DTE address                     Value: DTE address

    Address of the remote DTE, including the remote subaddress (if
    any), to which the call is directed.

    Example:

    set x25 access template TEMPLATE-0 -
        destination dte address 3234234234