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  • Freeswitch 1.6 Cookbook
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Freeswitch 1.6 Cookbook

Freeswitch 1.6 Cookbook

By : Anthony Minessale II, Giovanni Maruzzelli
5 (3)
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Freeswitch 1.6 Cookbook

Freeswitch 1.6 Cookbook

5 (3)
By: Anthony Minessale II, Giovanni Maruzzelli

Overview of this book

FreeSWITCH 1.6 Cookbook is written for anyone who wants to learn more about using FreeSWITCH in production. The information is presented in such a way that you can get up and running quickly. The cookbook approach eschews much of the foundational concepts, and instead focuses on discrete examples that illustrate specific features. If you need to implement a particular feature as quickly as possible, then this book is for you.
Table of Contents (9 chapters)
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Preface
Preface
What this book covers
What you need for this book
Who this book is for
Sections
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Routing Calls
1. Routing Calls
Introduction
Internal calls
Incoming DID (also known as DDI) 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 SIP To: headers on registered endpoints to reflect DID numbers
2
2. Connecting Telephones and Service Providers
2. Connecting Telephones and Service Providers
Introduction
Configuring an SIP phone to register with FreeSWITCH
Connecting to Skype
Configuring an SIP gateway
Codec configuration
3
3. Processing Call Detail Records
3. 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
Directly inputting CDRs into various databases in real time
4
4. External Control
4. 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
5
5. PBX Functionality
5. PBX Functionality
Introduction
Creating users
Accessing voicemail
The 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
Recording calls
6
6. WebRTC and Mod_Verto
6. WebRTC and Mod_Verto
Introduction
Configuring FreeSWITCH for WebRTC
SIP signaling in JavaScript with SIP.js (WebRTC client)
Verto installation and setup
Verto signaling in JavaScript using Verto.js (Verto client)
7
7. Dialplan Scripting with Lua
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7. Dialplan Scripting with Lua
Introduction
Creating a basic Lua script
User interaction and DTMF gathering
Using conditionals, loops, web calls, and regular expressions
Connecting to an external database
8
Index
Index

User interaction and DTMF gathering

This recipe elaborates the interaction of the dialplan with the users.

Getting ready

This time, the dialplan extension that we add will do things before starting the Lua script. This is not necessary at all, but is being done here to let you know that the dialplan and scripting complement each other.

Tip

The best strategy for efficiency, counseled by FreeSWITCH developers, is to use the dialplan as much as you can. It is the most efficient (compiled in a tree in RAM) way to process your calls. Then, when things require logic (loops, conditionals, and so on) that does not fit well in XML, spawn a script.

Create a dialplan extension 12346. It will call our second Lua script. Edit the /usr/local/freeswitch/conf/dialplan/default/02_interaction.xml file:

<include>
  <extension name="Interaction and DTMFs gathering">
    <condition field="destination_number" expression="^(12346)$">
        <action application="answer"/>
        <action application...

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