What's the difference between the 112 and 480 port versions, then. Keying?

True, I found a 17F version for 96 (labeled as 112) and for 480 (since they are for FXII), but what would I be able to do if I had a FXT 224 or 464? If you go back and look at the software for FXS/FXT, it was different for 112, 224, and 464.