ANT  .--[ ]---------------. |  FON 2200 | | | | | | | | .-. | [PC] (via Pegelanpassung) | |o| | GND --> GND | |o| | RX --> TX | |o| | TX --> RX | |o| | +3.3V | '-' | | | | | | LEDs | | O O O | '---------------------'
I adopted a spare data cable for mobile phones, configured for Samsung SGH-E700 but the PCB: DC-U-6858(A) seems quite generic, e.g. it is offered for Siemens as well. The PCB comprises the OTi6858 chip. FWIW: not the Prolific IC, in case you get confused when Windows is looking for a "USB-UART Tx Line" device driver. A slightly more recent version is here that works with Win2K as well with Win XP)
GTD with Windows
Unfortunately my Ubuntu notebook (running kernel 2.6.20-16-generic #2 SMP) doesn't support the OTI 6858 IC out of the box and I wasn't in the mood to try this patch. (Update: problem solved, tested with 2.6.24-23-generic #1 SMP)
FON <--- standard ethernet cable ---> PC