Information feedback loop

Is it possible to create a scenario where I can create an information feedback loop. My project is called Playing Telephone with ghosts...what would happen if i built an installation of a telephone booth in old city Philadelphia, merging old technologies with new...stand in a telephone booth, dial your cell phone with the number provided, the phone in the booth rings and the person picks up the receiver, is it them, is it an art piece, are they calling themselves? How much can i mess with this?