Gentlemen,

Before ordering any "USB to Serial" adapters, contact the sim manufacturer and verify that their cables will indeed work with such adapters!

I am almost sure that AFP cable will NOT work with "USB to Serial" adapter. The cable, besides carrying/converting the signal from the transmitter to the PC, also serves as a copy protection device, a "dongle". Such devices are programmed to access the hardware at very low level and may not work with a "virtual" serial port of a USB adapter.

I'll be gald if I'm wrong.