Acnodes OPC 8190 - Manual (Page 43)

default setting is On/Off.
On/Off
Pushing the power button turns the computer
on or off. This is the default setting. This is the
default setting.
Suspend
Pushing the power button places the computer
in Suspend mode or Full On power mode.
*** Advanced Resume Event Controls ***
 Resume On Ring
This item enables or disables the function of Resume On
Ring that resumes the system through incoming calls.
 Resume On RTC Alarm
You can set “Resume On RTC Alarm” item to enabled and
key in Data/time to power on system.