Book Image

Mastering FreeSWITCH

By : Russell Treleaven, Seven Du, Darren Schreiber, Ken Rice, Mike Jerris, Kalyani Kulkarni, Florent Krieg, Charles Bujold
4 (1)
Book Image

Mastering FreeSWITCH

4 (1)
By: Russell Treleaven, Seven Du, Darren Schreiber, Ken Rice, Mike Jerris, Kalyani Kulkarni, Florent Krieg, Charles Bujold

Overview of this book

FreeSWITCH is one of the best tools around if you’re looking for a modern method of managing communication protocols through a range of different media. From real-time browser communication with the WebRTC API to implementing VoIP (voice over internet protocol), with FreeSWITCH you’re in full control of your projects. This book shows you how to unlock its full potential – more than just a tutorial, it’s packed with plenty of tips and tricks to make it work for you. Written by members of the team who actually helped build FreeSWITCH, it will guide you through some of the newest features of version 1.6 including video transcoding and conferencing. Find out how FreeSWITCH interacts with other tools and APIs, learn how to tackle common (and not so common) challenges ranging from high availability to IVR development and programming advanced PBXs. Great communication functionality begins with FreeSWITCH – find out how and get your project up and running today.
Table of Contents (21 chapters)
Mastering FreeSWITCH
Credits
About the Authors
About the Reviewers
Contributors
www.PacktPub.com
Preface
7
WebRTC and Mod_Verto
Index

What is a FreeSWITCH module?


FreeSWITCH proper, the core FreeSWITCH, is a switching and mixing fabric with some message queues and a lot of very abstract APIs that define concepts and actions. The only possible interaction with the core is via those APIs and message queues; there is no access whatsoever to internal data, structure, functions, and so on. Everything is completely opaque and protected; there is no way to harm the stability and performance of core. From the outside, core is a blackbox able to accept commands and return results via APIs.

All functionalities are implemented in modules.

A FreeSWITCH module is a shared library to be loaded by core. A module provides additional features, APIs, and implementations. Usually, a module is the low-level plumbing needed to interact with the real world.

In core you have the concepts of channel, session, call, message, codec, and many others. These are just concepts, well thought-out and articulated abstractions useful to describe real-time...