<html><body><div style="font-family: Arial; font-size: 12pt; color: #000000"><div>When I started down that path, I picked up a copy of "Asterisk: The Definitive Guide" at the book store.<br></div><div>An online verision is here : <a href="http://www.asteriskdocs.org/en/3rd_Edition/asterisk-book-html-chunk/index.html">http://www.asteriskdocs.org/en/3rd_Edition/asterisk-book-html-chunk/index.html</a><br></div><div><br></div><div>Take a look at chapter 5.<br></div><div><br></div><div>This version addresses Asterisk 1.8, but the basics are the same.<br></div><div><br></div><div><br></div><div><br></div></div></body></html>