You will need a null modem cable DB9F to DB9F. Null Modem Cable http://www.maplin.co.uk/Search.aspx?criteria=L71BT&DOY=2m6 If your pc does not have a serial port you will need a USB to serial port adapter to use in conjunction with the null modem cable. USB Adapter.. http://www.peats.com/cgi-bin/catalog.cgi?view_product=1&id=4520 These two cable links are only for reference as they can be purchased alot cheaper on fleabay if u dont have maplins close you can also get them in peats