Pinouts for this cable RJ12 end are:
USB RJ12
Pin 4 --- RXD --- Pin5
Pin 5 --- TXD --- Pin3
Pin 1 --- GND --- Pin6
Pin 1 --- GND --- Pin1
Support Android, Support Win 8, Win 7, XP, 2000, Linix, Mac OS.
UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity .
USB 2.0 Full Speed compatible