VoIP Hacking Techniques

by Mirko Raimondi What you will learn... • basics of VoIP network protocols • how to attack a VoIP network • how to defend a VoIP network What you should know... • basics of networking The Public Switched Telephone Network (PSTN) is a global system of interconnected, various analog sized phone networks which provides users the capability to carry voice conversations with each other. Initially, the most basic analog network service, called POTS (Plain Old Telephone Service), used a pair of twisted copper wires in order to connect a residential phone to a central office from where a residential customer can dial out in the PSTN. Initially, the PSTN was a simple one-to-one telephone line connecting phones from one room to another. When telephone business grew, Private Branch eXchanges (PBX) were designed, and deployed in office settings to provide the increasing of telephone lines and to connect internal callers (over....