BTW, I had one heck of a time finding a RS-232 to USB program that would work with windows 7 to run my Ten Tec RX320D, but I did finally find one and now it works like a hose.
I remember when UART was a big deal.
Back in the day, I helped develop a UART box that would let you command individual processors in a complex system when the main frames were offline.
/johnny