Serial port parameters. Choose the appropriate parameters for
the modem or the host.
Note: If Data is 7 bit, the XMODEM, ZMODEM, B PLUS and Quick-VAN
protocols are disabled. If Flow control is Xon/Xoff, the XMODEM
and Quick-VAN protocols are disabled.
Transmit delay
Time intervals between characters (lines) being sent, in milliseconds.