Take and extension cord and cut the side you plug into the wall to 6 in( This doesn't matter how long) Strip the 2 wire inside so there exposed about 1 1/2 in.
Bring this to the desired location. Now take a Phone and remove the plastic over the receiver. The receiver should have 2 wired running to it. Cut or pull these out of it. Attach one wire from the extension cord to one from the receiver. Repeat with the other wire. You can tape it if you like but you don't haver too. Plug the extension cord in. Done. Now a electrical system that was designed to carry 2 Volts now is carrying 120 volts. All the phones are now dead.

No, one phone is dead, a fuse is blown and you may have a little melted wiring.

A better idea: use scissors.