The CA-42 cable comes in all different flavours, each with a potentially different USB-serial bridge IC. The internal cabling is not consistent either, although the pinout of the Pop-port is fixed.
Here is the pinout of a Nokia Pop-port:
http://pinouts.ru/CellularPhones-Nokia/ ... nout.shtmlYou need to use pins 6, 7, and 8.
To identify the bridge chip, you could use Microsoft's UVCView utility:
http://www.users.on.net/~fzabkar/USB_ID ... ew.x86.exeThe Vendor ID and Product ID will probably identify the bridge manufacturer, in which case you may find drivers on their web site.