Here are two books on PDF;
"Telehone Projects for the Evil Genius"
and
"Understanding Telephone Electronics"
Enjoy! :) -Matt
Thanks Matt for the link, I'm downloading them now.
I'll add them to Ma Bell, which I haven't finished reading yet.
D/P
thanks Matt, great help especially for me with limited access to phone books
Not to be a wet blanket, but be careful of building any of the circuits in the Evil Genius book. I've paged through it, and there are a depressing number of errors. The projects themselves are fine, and the errors are generally not catastrophic - but the circuit won't work. If you built one and checked it out thoroughly, and it just won't work, contact one of the engineers on the group (of which I am one) for a quick verification of the instructions.
Bill
Found this while reading around on here. These are really good for people who are more or less clueless as myself when it comes to the technical side of the hobby.