Hi Thanks for your interest & the replies received so far. For the avoidance of doubt, I know that the KIO2 is not a true RS232 socket & I constructed the shielded 4 wire adaptor cable (as in the KIO2 manual) to plug into the K2 KIO2 port & plug the FTDI chipset USB/RS232 into that cable & then into the laptop USB port. 73 Ray G3XLG