FreeSWITCH Cookbook

FreeSWITCH Cookbook

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

Credits

About the Authors

About the Reviewers

www.PacktPub.com

Preface

Free Chapter

Routing 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

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

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

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

Using phrase macros to build sound prompts

Creating XML IVR menus

Basic text-to-speech with mod_flite

Advanced text-to-speech with mod_tts_commandline

Listening to live calls with telecast

Recording calls

Index

Customer Reviews

5 star

4 star

3 star

2 star

1 star

Launching a call with an inbound event socket connection

Using an inbound event socket connection to launch a call is a common requirement for some applications, such as outbound IVRs. In a case like this it is advantageous to handle the generating of the calls in a non-blocking manner using the ESL connection object's bgapi() method. This recipe discusses how to use the bgapi() method with the corresponding "Background-Job UUID".

Getting ready

Be sure that you have configured ESL for your system and that you have followed the steps in Establishing an inbound event socket connection earlier in this chapter. The examples here are written in Perl but the principles apply to any ESL-enabled language. Of course, you will need a text editor and a SIP phone registered to your FreeSWITCH server in order to test this example.

How to do it...

Start by creating the new script:

Create the file scripts/ib_bgapi.pl in a text editor and add these lines:
```
#!/usr/bin/perl 
use strict; 
use warnings; 
require...
```

FreeSWITCH Cookbook

FreeSWITCH Cookbook

Overview of this book

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FreeSWITCH Cookbook

Launching a call with an inbound event socket connection

Getting ready

How to do it...