Outdoor base stations, the boxes strapped together are antenna splitter matcher units, which provide the multiband signals from the antennas to the transceiver unit, and there is active electronics in those along with more in the directional antennas. The whole lot is probably Huawei made. The big rectangular boxes will contain a power supply which supplies 48VDC and which also does battery back up, along with having the fibre transceivers for the backhaul. The antennas are directional, they contain a few separate steerable antenna arrays inside to make multiple sectors to increase traffic density.
I have the same layout by me, just all indoor units for lower maintenance, as the whole lot is kept at 24C by dual airconditioners and a management unit.