The Speed can be specified with any number. Actually, the serial port driver may not reflect your speed.
Flow control can be configured in the following:
none ... No flow control
Xon/Xoff ... Software flow
hardware ... Hardware flow(RTS/CTS)
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.