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Mastering FreeSWITCH

You're reading from   Mastering FreeSWITCH Advanced tips and tricks for advanced multimedia communication

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Product type Paperback
Published in Jul 2016
Publisher Packt
ISBN-13 9781784398880
Length 300 pages
Edition 1st Edition
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Authors (8):
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Darren Schreiber Darren Schreiber
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Darren Schreiber
Russell Treleaven Russell Treleaven
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Russell Treleaven
Kalyani Kulkarni Kalyani Kulkarni
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Kalyani Kulkarni
Seven Du Seven Du
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Seven Du
Charles Bujold Charles Bujold
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Charles Bujold
Ken Rice Ken Rice
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Ken Rice
Florent Krieg Florent Krieg
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Florent Krieg
Mike Jerris Mike Jerris
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Mike Jerris
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Table of Contents (15) Chapters Close

Preface 1. Typical Voice Uses for FreeSWITCH FREE CHAPTER 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

Dialplan application


Modules can add applications to those available to be called in dialplan.

Applications in dialplan are invoked as actions and can have arguments in the data string. An example of application and arguments is the bridge app, which takes the dialstring as the argument to be used to originate the call leg to be bridged to:

In our implementation, we registered a dialplan app with FreeSWITCH core during the LOAD function. Here, we'll have a look at how we implemented the actual application's inner workings.

We get the channel object from the session object we were passed.

Then we check if the arg string we were passed is empty (zero length). If it's empty, we assign a default value to how many loops we'll execute. If it's not empty, we convert it into a number, assigning a default in case of error, and enforcing value boundaries.

For each loop we then print a log line that pretty much displays all the entities we used.

From dialplan, you invoke this application as follows:

&lt...
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