Pinout schematics: 3.5mm Jack RS232 1st ring(tip)-Pin 3 2nd ring-Pin 5 3rd ring-Pin 2 4th ring-Pin 5. I dont know pinout, I get it with receiver I FOUND ON INTERNET: Female RS232 to 3.5mm Jack Cable Cross over pin configuration Fully moulded Ideal to use to 'flash' Programme Free to air boxes from master box or PC Ideal to use to repair 'bricked' or 'dead' boxes Used for Amiko boxes with 3.5mm jack in order to repair or flash them.