Now we get to a really interesting part. As you drive along rural roads, you'll see what appear to be paint cans, each with a this cable coming out the top. As

Now we get to a really interesting part. As you drive along rural roads, you'll see what appear to be paint cans, each with a this cable coming out the top. As you might have guessed, these therefore are not paint cans, but are the enclosures for the loading coils. If there is a 600-pair cable, then you need 600 loading coils (these look something like little spools of thread), and you need to attach each to the feeder cable. I hadn't seen that config before. (looong-time infra rubbernecker). I assume I've seen variants but am not recalling what they look like.