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9 pin D-SUB female connector layout
9 pin D-SUB female connector
RS232 TO RJ11, UPGRADE FIRMWARE CABLE FOR ATEN KVM SWITCHES. This is for the CS-175, cs-1732a, CS1924M.


Device 1
Pin Number
Device 1
Pin Name
Direction Device 2
Pin Number
Device 2
Pin Name
2 RxD   1    
3 TxD   2    
7 RTS   3   may be N/C
5 GND   4    

After 1-2 minutes, Aten closes the port. If you want to control the device through a computer or other devices (for example Crestron CP2E) and be sure that the device will execute the command. 1. The OPEN command (to open the port) 2. Next, a command for the device (for example, sw i01)

4 pin RJ11 male connector layout
4 pin RJ11 male connector
According to 17 reports in our database (16 positive and 0 negative) the ATEN KVM Switches Firmware upgrade cable pinout should be correct.

Is this pinout
ATEN KVM Switches Firmware upgrade cable visual pinout:click to enlarge
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