I'm in the process of building my rack and running new cables through the house and planning out my network map. I came across them while I was grabbing my spools.

All of this is "leftovers" from installations that never went back and we got accounted for. By the time the contracted out network people had left the manager had them sitting by the trash because they were taking up too much space...I didn't work with the network or LV folks but my job required a working at least local network so I was always around at the same time.