/sys$common/syshlp/helplib.hlb SET, TERMINAL, Qualifiers, /PRINTER_PORT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /PRINTER_PORT
       /NOPRINTER_PORT

    Specifies whether the terminal has a printer port (an attribute
    not set by the SET TERMINAL/INQUIRE command). The default is
    installation dependent.