hi
make a nul-modem-cabel
This is the setup for the version 9 pin - 9 pin:
1+6 < - - - > 4
2 < - - - > 3
3 < - - - > 2
4 < - - - > 1+6
5 < - - - > 5
7 < - - - > 8
8 < - - - > 7
This is the setup for the version 9 pin - 25 pin (for old the PC with seriale to 25 pin)
1+6 < - - - > 20
2 < - - - > 2
3 < - - - > 3
4 < - - - > 6+8
5 < - - - > 7
7 < - - - > 5
8 < - - - > 4