Book Image

FreeSWITCH 1.8

By : Anthony Minessale II, Giovanni Maruzzelli
Book Image

FreeSWITCH 1.8

By: Anthony Minessale II, Giovanni Maruzzelli

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. This book introduces FreeSWITCH to IT professionals who want to build their own telephony system. This book starts with a brief introduction to the latest version of FreeSWITCH. We then move on to the fundamentals and the new features added in version 1.6, showing you how to set up a basic system so you can make and receive phone calls, make calls between extensions, and utilize basic PBX functionality. Once you have a basic system in place, we’ll show you how to add more and more functionalities to it. You’ll learn to deploy the features on the system using unique techniques and tips to make it work better. Also, there are changes in the security-related components, which will affect the content in the book, so we will make that intact with the latest version. There are new support libraries introduced, such as SQLite, OpenSS, and more, which will make FreeSWITCH more efficient and add more functions to it. We’ll cover these in the new edition to make it more appealing for you.
Table of Contents (23 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Event format - Headers and Body


Before going to more depths, let's see what an "event" is. Event is a text message in a format loosely based on those of famous Internet protocols such as SIP, SMTP, and HTTP: many "headers" (key/value pairs) and possibly one "body" (free form payload):

Event-Name: RE_SCHEDULE 
Core-UUID: 6ddf010e-bc0b-4366-8413-6becd7f77076 
FreeSWITCH-Hostname: lxc111 
FreeSWITCH-Switchname: lxc111 
FreeSWITCH-IPv4: 192.168.1.111 
FreeSWITCH-IPv6: 2001%3Ab07%3A5d32%3A860b%3Aa067%3A61ff%3Afe4f%3A2119 
Event-Date-Local: 2017-06-26%2018%3A39%3A51 
Event-Date-GMT: Mon,%2026%20Jun%202017%2018%3A39%3A51%20GMT 
Event-Date-Timestamp: 1498502391402930 
Event-Calling-File: switch_scheduler.c 
Event-Calling-Function: switch_scheduler_execute 
Event-Calling-Line-Number: 71 
Event-Sequence: 22105 
Task-ID: 1 
Task-Desc: heartbeat 
Task-Group: core 
Task-Runtime: 1498502411 

This is the dump of one of the easiest events to spot, the rescheduling of the heartbeat (an internal FreeSWITCH...