Starts a TELNET session that runs TN3270 and does one of the
    following:

    o  Displays the TELNET prompt.

    o  Establishes a connection to a remote host.

    For help with individual TELNET commands, enter the following
    command:

    $ TN3270
    TELNET> HELP

    Format

      TN3270  [ host ]

              [ /CHARACTER_SET=file ]

              [ /KEY_DEFINITIONS=file ]

              [ /NATIONAL_CHARACTERS=char_set ]

              [ /NOINTERACTIVE ]

              [ /PORT=n ]

              [ /PRINTER=file ]

              [ /STATUS=state ]

              [ /TERMINAL_TYPE=IBM-3278-n ]