There is also no practical reason to have windows in a telephone equipment building. They cannot be opened to cool, they only would light a limited area along t

There is also no practical reason to have windows in a telephone equipment building. They cannot be opened to cool, they only would light a limited area along the wall. The entire building must be air conditioned, and lighting is only turned on when people are in the equipment aisles. Warehouses and data centers are the same, except that they don't attract attention since they are low horizontal structures with much more utilitarian cladding. The most interesting telecom buildings are the ones underground.