I understand that I have to combine this ...even missing another converter until the PC port ... I think myself could fabricate this cable using only one DB9 male to USB, changing the pinout ....but i discover now this cable must be a professional,,right? is not so very simple this cable have to buy same,, why has microchip involved for this conversion,,right? http://www.ftdichip I thought it was just changing the pin DB9 to USB,,,,D+/TX,,,,D-/RX,,,,GND/GND thank you ...