The icusb232 feetn ftdi usb to null modem serial adapter cable 1 port converts an available usb 11 or 20 port into an rs232 null modem serial db9 port solving dcedte conflicts directly without requiring additional cross wired serial cables or adapters this compact adapter features com retention allowing the same com port value to automatically be re assigned to the port if the cable is disconnected and re connected to the host computer or if the system is rebooted the integrated ftdi chipset s