Use a cheap phone sync cable with the serial port
What do i need?
We organized some futuredial phone sync cables mentioned at http://www.nslu2-linux.org/wiki/HowTo/AddASerialPort Section "USB-Connection". These phone sync cables are quite cheap at ebay. you can buy any other cable mentioned at that wikipage...the only difference will be the color coding of the cables.
OR: buy some from here: http://cgi.ebay.de/PolarLink-USB-Datenkabel-Siemens-C25_W0QQitemZ220086930396QQihZ012QQcategoryZ111305QQrdZ1QQssPageNameZWD1VQQcmdZViewItem here is the pinout:
Quotation from http://www.nslu2-linux.org/wiki/HowTo/AddASerialPort:
Most of the cheap cables are based on a Prolific PL2303 chipset (PL2303 datasheet ) which is supported under Windows (Driver Download) and Linux. A third party Nokia data cable for a 8000 series phone has been used with no problems. A data cable from the Siemens C25/35/45 works too. The cables from the old models (i.e. C25) costs a 2..3$.
Comment: Find many more pinouts at http://www.nslu2-linux.org/wiki/HowTo/AddASerialPort
What to check first
Open the dongle in the middle of the cable to check if the profilic chip is used. You need to check the color coding of the wires. Best would be to just leave the dongle open. In my example here we have the color coding for the FutureDial-Cables. If you have a different one check http://www.nslu2-linux.org/wiki/HowTo/AddASerialPort for the color coding.
Open the phone connector of the cable
Prepare the phone sync cable
Solder the phone sync cable to the USB-plug
You will have both read and write access if you solder it that way.
In this picture: Green is GND, Yellow is RX (as in "data entering the LSPro") and Orange is TX (as in "data coming from the LSPro"). The not connected terminal is VCC.
You need a Windows driver for the Prolific USB-to-Serial adaptor, available at the Prolific Technology Inc Support Site. The cable will show up as COM4.
Plug the USB connector into your Linux box. Start minicom and set the port to /dev/ttyUSB0 115200 8N1. Power up and you will see a '+' printed.