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  • Book Overview & Buying FreeSWITCH Cookbook
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FreeSWITCH Cookbook

FreeSWITCH Cookbook

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FreeSWITCH Cookbook

FreeSWITCH Cookbook

4.5 (8)
Buy this Book

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.
Table of Contents (12 chapters)
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FreeSWITCH Cookbook
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FreeSWITCH Cookbook
Credits
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Credits
About the Authors
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About the Authors
About the Reviewers
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About the Reviewers
www.PacktPub.com
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www.PacktPub.com
Preface
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Preface
Lock Free Chapter
1
Routing Calls
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Routing Calls
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Introduction
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Internal calls
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Incoming DID calls
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Outgoing calls
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Ringing multiple endpoints simultaneously
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Ringing multiple endpoints sequentially (simple failover)
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Advanced multiple endpoint calling with enterprise originate
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Time of day routing
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Manipulating To: headers on registered endpoints to reflect DID numbers
2
Connecting Telephones and Service Providers
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Connecting Telephones and Service Providers
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Introduction
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Configuring a SIP phone to register with FreeSWITCH
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Connecting audio devices with PortAudio
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Using FreeSWITCH as a softphone
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Configuring a SIP gateway
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Configuring Google Voice
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Codec configuration
3
Processing Call Detail Records
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Processing Call Detail Records
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Introduction
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Using CSV CDRs
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Using XML CDRs
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Inserting CDRs into a backend database
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Using a web server to handle XML CDRs
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Using the event socket to handle CDRs
4
External Control
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External Control
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Introduction
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Getting familiar with the fs_cli interface
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Setting up the event socket library
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Establishing an inbound event socket connection
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Establishing an outbound event socket connection
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Using fs_ivrd to manage outbound connections
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Filtering events
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Launching a call with an inbound event socket connection
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Using the ESL connection object for call control
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Using the built-in web interface
5
PBX Functionality
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PBX Functionality
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Introduction
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Creating users
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Accessing voicemail
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Company directory
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Using phrase macros to build sound prompts
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Creating XML IVR menus
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Music on hold
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Creating conferences
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Sending faxes
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Receiving faxes
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Basic text-to-speech with mod_flite
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Advanced text-to-speech with mod_tts_commandline
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Listening to live calls with telecast
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Recording calls
1
Index
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Index

Filtering events

Events are the lifeblood of the FreeSWITCH eventing system. FreeSWITCH throws events for virtually everything that happens. This can overwhelm a program (and indeed the programmer) with a flood of information. The solution is to use the FreeSWITCH event filter feature.

Getting ready

Learning about filters is very simple. Initially we will just use fs_cli connected to a FreeSWITCH server. Later we will look at some simple programming examples using ESL. You will need a phone connected to your FreeSWITCH server, and two terminal windows open so that you can look at your program in one session and fs_cli in another.

How to do it...

Consider a simple example. Here we will compare the event socket output before and after using a filter:

  1. Launch fs_cli and connect to a running FreeSWITCH server. Issue these two commands at fs_cli:

    /log 0
/event plain all

  2. Wait a few seconds and no doubt you'll see some events, and possibly a lot of events.

  3. From your phone, dial *98 and wait for the...

CONTINUE READING
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Tech Concepts
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Programming languages
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FreeSWITCH Cookbook
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