Go to this web page
http://www.hurco.com/USA/Support/Pages/FAQ.aspx
In the search box type 232
Select the "HOW TO HOOK UP A RS 232 CONNECTION TO A HURCO WITH ULTIMAX CONTROL. ALSO HYPER TERMINAL SETUP INFORMATION"
Then download and read each of the support doc's. Use windows Hyper Terminal as described in the doc. It works.
You need to bale up a null modem RS232 cable depending on the control rs232 port. Some are the round Amphenol connector, others are a std DB25.
For NC Program Transfer Set Data Bits = 7, Parity = Even, Stop Bits = 1