I was on 1950s wires, with many splices and the last couple years, they were using one wire from two different twisted pair (a wire had failed on two different pairs and there were no more spares and they would not replace the old wire). The younger guys continually screwed up what service we did have, the old guy (only one left around here) would make it work. He finally put notes in the boxes where things were none standard to keep the stupids from messing with things. The local manager was on my speed dial for several years. He knew to send the old guy to get us back up and running. Only so much that can be done without spending some serious money when the infrastructure was neglected for so long.