PBX Security and Forensics presents readers with theoretical and practical background for Private Branch Exchanges (PBXs). PBX is privately owned equipment that serve the communication needs of a private or public entity making connections among internal telephones and linking them to other users in the Public Switched Telephone Network (PSTN).  Targeted damages and attacks in PBXs can cause significant instability and problems. The author provides examples of these threats and how to prevent against such attacks in the future. Readers will also be shown where to find forensics data and how to conduct relevant analysis.