tak zober kus dratu a prepoj piny 2 a 3 na samici, a otestuj to len s jednym PC (budes vidiet to co pises priamo v tom hyperterminali v ktorom pises).
Ked to pojde tak mozes skusit aj handshaking piny, prepojis dalsie 2 draty podla napr.
http://zone.ni.com/cms/images/devzone/tut/RS232Fem ale.gif a nastavis hardwarovy handshaking.