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Mastering FreeSWITCH

You're reading from  Mastering FreeSWITCH

Product type Book
Published in Jul 2016
Publisher Packt
ISBN-13 9781784398880
Pages 300 pages
Edition 1st Edition
Languages
Concepts
Authors (8):
Russell Treleaven Russell Treleaven
Profile icon Russell Treleaven
Seven Du Seven Du
Profile icon Seven Du
Darren Schreiber Darren Schreiber
Profile icon Darren Schreiber
Ken Rice Ken Rice
Profile icon Ken Rice
Mike Jerris Mike Jerris
Profile icon Mike Jerris
Kalyani Kulkarni Kalyani Kulkarni
Profile icon Kalyani Kulkarni
Florent Krieg Florent Krieg
Profile icon Florent Krieg
Charles Bujold Charles Bujold
Profile icon Charles Bujold
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Toc

Table of Contents (21) Chapters close

Mastering FreeSWITCH
Credits
About the Authors
About the Reviewers
Contributors
www.PacktPub.com
Preface
1. Typical Voice Uses for FreeSWITCH 2. Deploying FreeSWITCH 3. ITSP and Voice Codecs Optimization 4. VoIP Security 5. Audio File and Streaming Formats, Music on Hold, Recording Calls 6. PSTN and TDM 7. WebRTC and Mod_Verto 8. Audio and Video Conferencing 9. Faxing and T38 10. Advanced IVR with Lua 11. Write Your FreeSWITCH Module in C 12. Tracing and Debugging VoIP 13. Homer, Monitoring and Troubleshooting Your Communication Platform Index

Receiving and firing events


Events are FreeSWITCH's nervous system. They carry around information, commands, and feedback.

Tapping into the event flow will give your module a complete and real-time view of what's happening in each of the many components and subsystems of FreeSWITCH, from channels to reporting.

Firing events enables your module to actively participate in this flow, making information available that other modules can act upon in real time, or sending API commands as if typed in the console.

Events come in various types and subcategories. Each module can subscribe to ALL events or only to a certain subset, and then further filter to which event to react to based on the content of the event's oh so many fields:

In our implementation, we subscribed to ALL events during the LOAD function.

Then, in the example_event_handler(), function we filter the events flow based on event_id (the specific kind of event), and if the event is suitable, then we get a particular header (for example...

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