Avalue ECM-QM57 - Manual (Page 9)

ECM-QM57 Quick Installation Guide
ECM-QM57 Quick Installation Guide 9
2.3 Setting Jumpers & Connectors
2.3.1 Clear CMOS (JBAT1)
* Default
Protect*
Clear CMOS
2.3.2 Serial port 1 pin 9 signal select (JRI1)
* Default
Ring*
+5V
+12V