Thank you for your kind reply.
Sorry my friend, I can't explain better because I speak english not fluently...
I already have serial cables for Axim and for peripherals, and null modem adapter/cable too.
My problem is that axim doesn't recognize my 56k modem, or my mobile phone as a modem, or my GPS 12.
I heard that the problem should be non compliance to rs232 standard of dell Axim although with original serial cable.
So i asked if is possible to modify such serial cable to give to my Axim a real serial port (already nullmodem ...if possible!).
Thanks