I don't know much about the construction of the Infowindow terminals, but I do know that they are useful for connecting to AS/400s. (Or at least there is a model of them that is used for AS/400s.) The twinax cable is probably for direct connection to an AS/400, as a terminal or as the primary console. If you need more information, let me know - I can dig it up. (I work for IBM, at the home of the AS/400.) Mike