DEFCON talk "Journey to the center of the phone network" Slides: https://media.defcon.org/DEF%20CON%2033/DEF%20CON%2033%20presentations/Enzo%20Damato%20-%20Jou

DEFCON talk "Journey to the center of the phone network" Slides: https://media.defcon.org/DEF%20CON%2033/DEF%20CON%2033%20presentations/Enzo%20Damato%20-%20Journey%20to%20the%20center%20of%20the%20PSTN%20How%20I%20became%20a%20phone%20company%2C%20and%20why%20you%20should%20too..pdf https://media.defcon.org/DEF%20CON%2033/DEF%20CON%2033%20pre... Video recording: somewhere