Who This Book Is For

This book is intended for Linux and networking professionals, who want to understand SIP and OpenSER from a practical perspective, or are interested in IP telephony and call routing. It is suitable for VoIP provider personnel, because it covers most of the existing components. Some experience with Linux and Networks is required to be successful in the labs. Even inexperienced Linux users can complete the labs, but knowledge about computer networks is essential. For inexperienced Linux users I suggest using WinSCP and Putty to edit the configuration files and send commands; both are free downloads.