A friend of mine maintains 3 office buildings here in town. The oldest one is around 40 years old or so.
At some point they ran out of copper pairs entering the building, so they abandoned them and installed a DSC SLC cabinet in the basement fed by fiber. The OSP cable is still in the basement phone room, with the protectors hanging off the wall because they needed room for all the 25 pair cables exiting the SLC.
