I went down to Tru-Value and bought 50 ft of wire. I didn't have any choices, I got the last one in the store.
My first problem was that I cut off about 4 inches of the plastic wrap around the wires and only found 3 conductors. After being a bit mystified for a few hours, I discovered that one of the wires didn't reach the end of the cable. Cut off another 4 inches and there was the forth wire.
The thing that really surprised me though is how thin the wires were. I had real problems working with the hair thin wire. If I bent the wire more than once, the wire just broke right off. I couple of times I cut the insulation off, went to pull the plastic off, and the whole wire just broke off. I bent one wire around a terminal and the bend wasn't quite right so I bent it again. Wire snapped right off on the second bend.
Next time I want to work with telephone cable, I'm going to do some searches and hopefully find something with a heavier conductor.
Just commenting, I know copper has gone up in price but this stuff was ridiculous.