Edimax Technology PS-1206PWg - Manual (Page 126)

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8.5.2 Upgrade Firmware from Browser
You can upgrade new firmware for this print server in this
page. Click “Browse” to select the new firmware in your
storage and then click “OK”, the firmware will be updated
in several minutes.
Be aware that if you have started upgrading firmware, you
have to follow all the upgrading steps or the print server
can’t turn back to normal configuration.