I recently put together a fiber system for my SQ5 and AR2412. As Keith says, it required a Fast Ethernet media converter on each end in order to make it work, but once I got there it’s been fine. Currently it’s only 50m, because I wanted to be certain it worked, but I’ll be adding a 250m fiber soon, which will cover just about every situation I’m in.
My media converters are TP-Link MC110CS that I got from B&H Photo. They’re SC/APC connectors, based on the advice of a friend who does a lot of work in broadcast video, but LC connectors seem to be more readily available in pre-made TAC fiber.