Well in my case he had no idea what he was there to do, I asked about replacing my 1 pair wire with maybe a 2 pair one but he didn't have any so he just put a 2nd one pair wire up.
One of the things he said to me before he went up the pole was that I'd been allocated pair 5 or something along those lines.
I just hope when I get my Fiber Extra activated the line isn't terrible, I watched him do most of it so worst case he messed up the NTE5 termination and I'll have to redo it, he left quite a bit of spare Dropwire too like 0.5- 1m more than needed so I've got plenty to work with.