System information

We have a web page for this book, where we list errata, examples, and any additional

information. You can access this page at:

http://oreilly.com/catalog/9780596517342

To comment or ask technical questions about this book, send email to:

bookquestions@oreilly.com

For more information about our books, conferences, Resource Centers, and the

O’Reilly Network, see our website at:

http://www.oreilly.com

Find us on Facebook: http://facebook.com/oreilly

Watch us on YouTube: http://www.youtube.com/oreillymedia

Acknowledgments

To David Duffett, thanks for the excellent chapter on internationalization, which would

not have been served well by being written by us North Americans.

Next, we want to thank our fantastic editor, Michael Loukides, for your patience with

this third edition, which took too long to get off the ground, and many long months to

finally get written. Mike offered invaluable feedback and found incredibly tactful ways

to tell us to rewrite a section (or chapter) when it was needed, and make us think it was

our idea. Mike built us up when we were down, and brought us back to earth when we

got uppity. You are a master, Mike, and seeing how many books have received your

editorial oversight contributes to an understanding of why O’Reilly Media is the success

that it is.

Thanks also to Rachel Head (nee Rachel Wheeler), our copyeditor, who fixes all our

silly grammar, spelling, and style mistakes (and the many Canadianisms that Leif and

Jim feel compelled to include), and somehow leaves the result reading as if it was what

we wrote in the first place. Copyeditors are the unsung heroes of publishing, and Rachel

is one of the very best.

Also thanks to Teresa Elsey, our production editor, and the rest of the unsung heroes

in O’Reilly’s production department.

These are the folks that take our book and make it an O’Reilly book.

During the course of writing this book, we had the pleasure of being able to consult

with many people with specific experience in various areas. Their generous contribu-

tions of time and expertise were instrumental in our research. Thanks to Randy Resnick,

organizer of the VoIP User Group; Kevin Fleming of Digium; Lee Howard, author of

iaxmodem and hylafax; Joshua Colp of Digium; Phillip Mullis of the Toronto Asterisk

Users Group; Allison Smith, the Voice of Asterisk; Flavio E. Goncalves, author of books

xxviii | Preface