The ONT will have a dc barrel jack with a 12v supply. I decided to use a POE splitter and send 12v down the ethernet cable from my server room to the ONT and then split it out there.
I did the same and has been working spot on since install

Much neater and backed up via the UPS protected switch supply. Win win.
Only pulls 3200mW, so pretty low in the grand scheme of things.
Edited by kjwkjw (Sun 18-Jul-21 16:52:19)