Asterisk Wiki
The official source of documentation for the Asterisk project, this wiki is maintained by the development team that manages the Asterisk code base. The development team is committed to keeping the content up to date and accurate. All Asterisk users are encouraged to participate by leaving comments in the wiki to constantly improve the documentation.
Visit docs.asterisk.org
Asterisk: The Definitive Guide
This is a book for anyone who uses Asterisk. It was written for, and by, members of the Asterisk community. Produced with the generous support of O’Reilly Media, Asterisk: The Definitive Guide is the 4th edition.
Videos
The following is a collection of video resources for Asterisk users and developers. Please keep in mind that the opinions expressed in these videos belong to the presenters, not Digium or the Asterisk.org community.
YouTube Videos – The Official Asterisk YouTube Channel
Say Hello to Asterisk – What is Asterisk and what can you do with it?
Asterisk Essentials – Online training course to learn the basics
Digium Phones for Asterisk – Digium’s line of IP phones designed exclusively for use with Asterisk and Switchvox
Security Best Practices 1: Threats – Part 1 of the Asterisk VoIP Security Webinar. Special Agent Michael McAndrews reviews the current trends in VoIP fraud. Check out the other three parts for more information on securing your Asterisk or Switchvox system.