This is an easy and inexpensive way to listen in on someones phone calls or get the residents into trouble.
If you look outside someones house you will see a cable attached to the wall and it leads down to a small beige coloured box about 4 x 6cm. Open this box and you will see 3 bolts.
Get an old phone and expose the wires which would usually have the plug on. Find the red and green wires and attach an alligator clip to the wires.
Now all you have to do is use trial and error to find which of the two bolts in the beige box will give you a dial tone. Once you have this you can run up massive phone bills, harrass people and listen to see if a target is inside, and theres no risk of it being traced back to you!!