Startechcom usb adaptor cables startechcom icusb232ftn the startechcom icusb232ftn ftdi usb to null modem serial adaptor 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 adaptorsthis compact adaptor features com retention allowing the same com port value to automatically be reassigned to the port if the cable is disconnected and reconnected to th