Sorry-
I am not working with the Ma Bell lines, just the lines after the phone switch. I need to get data to and retrieve data from an analog phone. Right now all I have is the pair of wires. If I can use the power from a non-inuse phone line and modulate the 48 VDC (which I am generating) I should be able to get data to and from the phone. The data will go to and from a PIC which will carry info about numbers called, time of day, etc.

My fall back plan is to use another pair, feed DC to power everything and still modulate the DC. The second pair approach is much easier for me but much harder for a retro-fit.

I am not folling with Miss Bells lines, otherwise I would be working from jail....... and getting a soldering iron would be tough .