Ok, I enlarged the pictures of the front and back of the plug. You can see the cable sticking out the front better now and some numbers are visible on the front of the outlet. You can also see how the 25 pair wires connect to the cable in the outlet.
I geuss heres a dumb ? but do u have the blueprints or layout of ur office or house????? cause it should be marked on there what the outlet is..... but if i would have to geuss i would geuss its either an old phone jack or a fax jack or even an old ltp port network thingy lol
Thats big pictures helps. As stupid as it sounds, it looks like you are seeing exactly what is for. It isn't an outlet. It is just a flange for a piece of wire to go into and it terminates in the back like you see. Instead of plugging something in, it gets hard wired. I have no idea what the point of this would be though.
As for what it is being used for in your office, it could be a million things. Anything that uses low voltage.