FreePBX 2.5 Powerful Telephony Solutions by Alex Robar

This book is a tutorial, with plenty of step-by-step instructions bundled with examples and screenshots. VoIP telephony concepts are discussed, and how-tos are provided to help the reader become familiar with FreePBX. This book is targeted at system administrators who want to get started with FreePBX. Previous knowledge of Linux or networking is not required, although some basic knowledge of PBX and Linux will be a bonus.