Ebook: Asterisk: The Future of Telephony

I was looking to this book to gain an overview of Asterisk. As is usually the case with O' Reilly books, this one did not disappoint. I would definitely recommend this to anybody who is starting to explore Asterisk.

Additionally, there are references and details useful for continuing your understanding of this wonderful platform. There is a lot of information that can get you started with a hands-on Asterisk experience.