The Open Source Telephony Project

Asterisk is software that turns an ordinary computer into a voice communications server. Asterisk powers IP PBX systems, VoIP gateways, conference servers and more. It is used by small businesses, large businesses, call centers, carriers and governments worldwide. Asterisk is free and open source. Asterisk is sponsored by Digium


  
   
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Learn to build telephony solutions with Asterisk.



Asterisk Events

Asterisk Events


Asterisk Support

Digium offers around-the-clock support for Asterisk.

Asterisk Support from Digium

Subscribe today and let our experienced, motivated, and knowledgeable Asterisk open support engineers help you deploy with confidence.



Telephony Interface Cards

Gateway interface cards for analog, T1, E1, ISDN BRI, ISDN PRI and SS7 networks.

Connect your Asterisk system with the PSTN.



Weekly Say Hello To Asterisk Webinar

New to Asterisk? Register now for our weekly live introductory webinar or watch the recorded version.

* What is Asterisk?
* What can I do with Asterisk?
* Which version should I use?
* How do I get started?


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Training Classes

Attend a live Asterisk training class and discover the power of open source communications.