Startechcom usb adaptor cables startechcom icusb2321x the icusb2321x professional grade usb serial adaptor cable from startechcom converts a usb 20 port into an rs232 serial port allowing you to connect to monitor and control serial devicesa durable single cable design makes this the perfect solution for mobile technicians who require serial connectivity once connected the usb to serial adaptor retains assigned serial com port values allowing the same values to be automatically reas