User`s guide

Wake On LAN (WOL)
If you are using an ATX power supply, you can configure your
system so that it powers down by software and can be resumed by
alarms. If you have installed a LAN adapter expansion card,
connect the card to the Wake On LAN connector WOL1. This
allows incoming traffic to resume the system from a software
power down. You need to enable this feature in the system setup
utility.
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