Various Electronic Devices  > ATEN pinouts
3.5mm TRRS (4 pin) male to DB9 female


Device 1
Pin Number
Device 1
Pin Name
Direction Device 2
Pin Number
Device 2
Pin Name
1      2 RxD   
2      7 RTS   
3      3 TxD   
4      5 GND   


4 pin 3.5mm (2.5mm) plug connector layout
4 pin 3.5mm (2.5mm) plug connector
9 pin D-SUB female connector layout
9 pin D-SUB female connector
According to 3 reports in our database (3 positive and 0 negative) this pinout should be correct.

Is this pinout
ATEN CS1644, CS1744 Firmware Upgrade Cable visual pinout:
ATEN CS1644, CS1744 Firmware Upgrade Cable diagram
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