MX4305UE User's Manual
1.5.2 AT/ATX Power Mode Select (JPSON1)
This jumper allows you to select ATX Mode or AT mode
1.5.3 COM POWER SETTING (JCOMPWR1~2)
This jumper allows you to select COM1/COM2 to support Ring/+12V/+5V
Ring (Default)
+12V
+5V
24 MX4305UE User's Manual