Originally Posted by
Tradewind
Fiber is too susceptible to temperature changes and so on to be buried as it would restrict movement/expansion/contraction too much and break the cables far too often.
Fiber is almost always hung. If you look on a utility pole and see a rather thick black cable with what looks like a black wad or like an electrical box every idk 6th pole. That's fiber. The box is a repeater. Sometimes there's more than one depending on how many services the utility pole is servicing in the area.