Startech com icusb232int1 internal 1 port usb to serial converter adapter startech com icusb232int1 p the icusb232int1 usb to rs232 serial adaptor from startech com allows you to add an rs232 port to any desktop system equipped with an available usb motherboard header unlike standard usb to serial cables this cable is designed for use inside the pc case affording an entirely internal solution with no mess or extra adaptors needed p p this compact and simple usb adaptor offers a cost ef