If you wish to run DECnet applications such as CTERM, MAIL, FAL,
    etc., over TCP/IP using RFC1859, answer YES to this question.
    This will cause net$configure to include port 399 in the set of
    osi transport rfc1006 listener ports attribute of your
    SYS$MANAGER:NET$OSI_TRANSPORT_STARTUP.NCL script.  Execution of
    this script will enable DECnet over TCP/IP on the local node.
    However, in order to establish RFC1859 connections, you must also
    ensure that:

    o  TCP/IP for OpenVMS and PWIP software is configured and running
       on both the local and remote nodes; and

    o  The remote node also has DECnet over TCP/IP enabled (i.e., it
       must also be listening on port 399).