External Control | FreeSWITCH Cookbook

Sign In Start Free Trial

Book Overview & Buying
Table Of Contents

FreeSWITCH Cookbook

4.5 (8)

FreeSWITCH Cookbook

4.5 (8)

Overview of this book

FreeSWITCH is an open source telephony platform designed to facilitate the creation of voice, chat, and video applications. It can scale from a soft-phone to a PBX and even up to an enterprise-class softswitch.In the FreeSWITCH Cookbook, members of the FreeSWITCH development team share some of their hard-earned knowledge with you in the book's recipes. Use this knowledge to improve and expand your FreeSWITCH installations.The FreeSWITCH Cookbook is an essential addition to any VoIP administrator's library.The book starts with recipes on how to handle call routing and then discusses connecting your FreeSWITCH server to the outside world.It then teaches you more advanced topics like CDR handling, practical examples of controlling FreeSWITCH with the event socket, and configuring many features commonly associated with a PBX installation.

FreeSWITCH Cookbook

FreeSWITCH Cookbook

Credits

Credits

About the Authors

About the Authors

About the Reviewers

About the Reviewers

www.PacktPub.com

www.PacktPub.com

Preface

Preface

Free Chapter

Routing Calls

Routing Calls

Introduction

Internal calls

Incoming DID calls

Outgoing calls

Ringing multiple endpoints simultaneously

Ringing multiple endpoints sequentially (simple failover)

Advanced multiple endpoint calling with enterprise originate

Time of day routing

Manipulating To: headers on registered endpoints to reflect DID numbers

Connecting Telephones and Service Providers

Connecting Telephones and Service Providers

Introduction

Configuring a SIP phone to register with FreeSWITCH

Connecting audio devices with PortAudio

Using FreeSWITCH as a softphone

Configuring a SIP gateway

Configuring Google Voice

Codec configuration

Processing Call Detail Records

Processing Call Detail Records

Introduction

Using CSV CDRs

Using XML CDRs

Inserting CDRs into a backend database

Using a web server to handle XML CDRs

Using the event socket to handle CDRs

External Control

External Control

Introduction

Getting familiar with the fs_cli interface

Setting up the event socket library

Establishing an inbound event socket connection

Establishing an outbound event socket connection

Using fs_ivrd to manage outbound connections

Filtering events

Launching a call with an inbound event socket connection

Using the ESL connection object for call control

Using the built-in web interface

PBX Functionality

PBX Functionality

Introduction

Creating users

Accessing voicemail

Company directory

Using phrase macros to build sound prompts

Creating XML IVR menus

Music on hold

Creating conferences

Sending faxes

Receiving faxes

Basic text-to-speech with mod_flite

Advanced text-to-speech with mod_tts_commandline

Listening to live calls with telecast

Recording calls

Index

Index

Introduction

One of the most powerful features of FreeSWITCH is the ability to connect to it and control it from an external resource. This is made possible by the powerful FreeSWITCH event system and its connection to the outside world: the event socket. The event socket interface is a simple TCP-based connection that programmers can use to connect to the inner-workings of a FreeSWITCH server. Furthermore, the FreeSWITCH developers have also created the Event Socket Library (ESL), which is an abstraction layer to make programming with the event socket a lot simpler. The following languages are supported by ESL:

C/C++
Lua
Perl
PHP
Python
Ruby
TCL

Keep in mind that the ESL is only an abstraction library—you can connect to the event socket with any socket-capable application, including telnet!

The tips in this chapter will focus most of their attention on using the event socket for some common use cases. The last tip, though, will introduce a particularly interesting way to connect to FreeSWITCH externally...

Visually different images

CONTINUE READING

83

Tech Concepts

36

Programming languages

73

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

FreeSWITCH Cookbook

Search

Your notes and bookmarks