Book Image

FreeSWITCH 1.2 - Second Edition

Book Image

FreeSWITCH 1.2 - Second Edition

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 skill."FreeSWITCH 1.2" comes to your rescue to help you set up a telephony system quickly and securely using FreeSWITCH. It is rich with practical examples and will give you all of the information and skills needed to implement your own PBX system.You will start with a detailed description of the FreeSWITCH system architecture. Thereafter you will receive step-by-step instructions on how to set up basic and advanced features for your telephony platform.The book begins by introducing the architecture and workings of FreeSWITCH before detailing how to plan a telephone system and then moves 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."FreeSWITCH 1.2" is an indispensable tool for novice and expert alike.
Table of Contents (24 chapters)
FreeSWITCH 1.2
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Summary


Lua is a great choice for building simple and elegant voice applications for interacting with callers. It is very lightweight and is therefore scalable. It has a simple syntax that is easy to learn and there is ample online documentation.

In this chapter, we accomplished a number of objectives:

  • Became acquainted with basic Lua syntax and control structures

  • Wrote several scripts that demonstrate how to interact with a caller, including answering, hanging up, playing sound files, playing Phrase Macros, and accepting input from the caller

  • Learned how to use the freeswitch object to send log messages to the console and to execute API commands

  • Installed LuaSQL and demonstrated how to connect to a PostgreSQL database from within a Lua script

  • Built mod_curl and enabled it to be loaded by default

  • Demonstrated the use of curl requests to perform web calls from within a Lua script

  • Became familiar with Lua's pattern-matching syntax

Now that we have a basis for writing scripts to interact with a caller...