There are two stages, one which converts RS-232 to TTL, and the other converts TTL to USB. [André] removed the RS-232 chip and patched his own board (shown on the left) into its TTL lines.

[Jethomson] worked out a way to use a Nokia USB cable at a USB to Serial cable ... In that post we learned that the Nokia phones are using TTL communications. Once you’ve completed [Jethomson ...