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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

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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