Network interface box marked AT&T. The cable in from the street OK. They run the 25 pair indoor cable direct from the box, along the roof, lift up one shingle, drill a hole and run the wire in. The ground wire heads out the other way, through a operable (though presently rotted) exterior window to reach a bathroom cold water tap. Oh yes, the 25 pair cable is, as far as I can tell, an indoor cable.
Hey, it’s an old building. Who cares if it leaks?