The one on the top left is the fiber hub. That’s the main feed into the building. The one below is a terminal which connects to all the fibers coming out of the greenish conduits. The four gray boxes are individual ONT which are probably for various data/phone connections(elevator/fire alarm/faxes) for the building.
A small rack and an ODF wouldn’t hurt.
Usually at least at newer buildings I have seen these are housed in a box like the one on the left. Most likely the one on the left is for cable.
The one on the top left is the fiber hub. That’s the main feed into the building. The one below is a terminal which connects to all the fibers coming out of the greenish conduits. The four gray boxes are individual ONT which are probably for various data/phone connections(elevator/fire alarm/faxes) for the building.