I've found that there are still quite a few old pieces of telephony equipment still in service these days, despite what some may say. Try searching for certain switch types that commonly service very remote areas. I've had some luck with that. I then usually try war dialing specific ranges in the exchange for that area, and I have to say I've found some very interesting numbers. av1d, I wasn't aware that anyone else besides me was suspicious about the ol' RedCom Labs MDX384 switches until I saw this thread. I've been exploring that switch type for a while, mainly because of their apparent tendancy to still be older switches.