HP DECnet-Plus for OpenVMS allows you to run DNA and OSI
    applications over an IP network backbone.  Applications
    include those supplied by HP, third-party applications, and
    user-written applications.

    RFC 1006 and RFC 1859 (formerly known as RFC 1006 Extension)
    are standards of the Internet community.  RFC 1006 defines
    how to implement ISO 8073 Class 0 on top of TCP.  Hosts that
    implement RFC 1006 are expected to listen on TCP port 102.

    RFC 1859 defines how to implement ISO 8073 Transport Class 2
    Non-use of Explicit Flow Control on top of TCP.  Hosts that
    implement RFC 1859 are expected to listen on TCP port 399.

    The DECnet over TCP/IP feature (RFC 1859) allows traditional
    DECnet applications (such as MAIL, CTERM, and FAL) to accept
    IP names and addresses.  The OSI applications over TCP/IP
    feature (RFC 1006) allows OSI applications (such as FTAM and
    VT) to accept IP names and addresses.