Hi. The reason I suggested the configuration I did was simply the one I have for conecting my old IBM 486 up to modern systems to install linux using commo and Jaws for dos. As for 9 pin null modems I never knew they existed. I had a 25 pin to 25 pin null modem that came with my braille n speak and I simply purchased cabling to convert from 9 pin to 25 pin and back. Anyway, it is a system I have used for many years, and never looked at other cabling options. sorry, about the confusion, but I merely was giving a detailed list of what I have to link two machines together for serial installs.
