posted 18 years ago
I think the statement is true.
When you have a mainframe which does not support modern technology like tcp. You can only access it via a terminal via a cable on COM port. In that case you can install a desktop next to the mainframe which communicates via the COM port to the mainframe using the proprietary protocol. The desktop can be accessed using tcp, so it will act as some kind of proxy between your screen scraping application and the mainframe.