[Jethomson] worked out a way to use a Nokia USB cable at a USB to Serial cable ... having seen [Will O’Brien’s] post covering serial communications on Nokia phones. In that post we learned ...

The classic serial null-modem cable was, among other things ... The device consists of two USB Communication Device Class, or CDC chips, creating a USB serial port for each attached computer.

If you've got a drawer full of USB cables, you're probably aware they're not all the same, so how should you make sure you're using the right one?