Book Image

FreeSWITCH 1.0.6

Book Image

FreeSWITCH 1.0.6

Overview of this book

FreeSWITCH is an open source telephony platform designed to facilitate the creation of voice and chat-driven products scaling from a soft-phone to a PBX and even up to an enterprise-class soft-switch. It is always exciting to design and build your own telephony system to suit your needs, but the task is time consuming and involves a lot of technical skills.This book comes to your rescue, helping you to set up a telephony system fast and easily using FreeSWITCH. It will take you from being a novice to creating a fully-functional telephony system of your own. It is rich with practical examples and will give you all of the information and skills needed to implement your own PBX system.The book begins by introducing the architecture and working of FreeSWITCH before detailing how to plan a telephone system and moving on to the installation, configuration, and management of a feature-packed PBX. You will learn about maintaining a user directory, XML dial plan and advanced dial plan concepts, call routing, and the extremely powerful Event Socket. You will finally learn about the online community and history of FreeSWITCH.
Table of Contents (18 chapters)
FreeSWITCH 1.0.6
Credits
About the Authors
About the Reviewer
Preface
The History Of FreeSWITCH
Index

Utilizing variables


Up to this point we have considered the basic use of channel variables. FreeSWITCH has more advanced ways of using variables, including global variables. Let's round out our understanding of variables by looking at some of these.

Testing variables with regular expressions

We have already discussed the purpose and basic use of the condition XML tag. Now we will discuss the different elements you can actually test to help make decisions about call handling.

FreeSWITCH offers three general categories of variables that you can test – caller profile fields, channel variables, and global variables. In addition, you can utilize macros and API functions and utilize their output in your conditions as well. We will review each of these in detail.

Caller profile fields

Caller profile fields are variables that are retrieved when a caller is authenticated. The variables are set within the directory and can include things like the caller's area code, codec preferences, and so on. You can...