If not this will not make any sense. But today's ATT DSL is unlike any system I've seen in years. I decline from write a tutorial but will give you a solution based on the new Att Uverse solution.
In Att's Uverse your phone comes from their DSL/Voice/Internet box,. In face it supports 2 lines NOW in their current hardware so all that is needed is that last link to your common 4 wire phone house wiring.
Again, I offer no tutorial.
The common house phone wiring has 2 lines now. The inner pair is line 1 and the next outer pair is line 2. So all we need is the OFF THE SHELF 4 WIRE PHONE cable from the back of the Uverse DSL/Phone/Internet box which is CLEARLY MARKED in all units I've seen and from that to the usual wall phone socket.
Bingo. 2 lines.
i currently reside in a home w/ an at&t dsl connection, i will be getting a 2nd dsl line into the home.
how can i go about setting up phone jacks to read 2 separate dsl lines w/o at&t coming into my home charging insane price to set up the jacks to read the 2 separate dsl lines.
what would i need to do it myself inside the home & outside the home in the box ?