Chris Pearce would like to thank the following people for their superb help on this edition: Joanna Chen, Clint Entrop, and Cullen Jennings for helpful comments in the overview; Mike Gallucci and Kevin Nash for extensive help with new routing behavior; Hakim Mehmood for help with QSIG details; Ho Bao for detailed information about CallManager trunk protocols; Kevin McMenamy for help with Cisco gateway components and H.323; Luc Bouchard, Stawan Kadepurkar, and James He for routing expertise; Murat Tiryakioglu for extensive comments throughout; Anne Smith, Graham Gudgin, and Paul Giralt for their encyclopedic systems knowledge of CallManager and other Cisco components; Chris Cleveland at Cisco Press for extensive attention to detail throughout and an emphasis on consistency and clarity; and John Kane at Cisco Press for accommodating ever-slipping deadlines from his overwhelmed writers.

Anne Smith would like to thank the following people in particular: Scott Veibell for being an excellent boss and offering his constant encouragement, counsel, guidance, and support; Paul Giralt for his extensive knowledge of everything IP Communications and the never-closing late-night IM window; Darrick Deel for providing critical short-notice, last-minute additions to the XML sections in Appendix C and patiently answering countless phone-related questions; Richard Platt for his vision; Kevin McMenamy for his continuing work on the Feature List, leveraged in Appendix A; John Restrick for help with last-minute DSCP additions; and Gurdeep Kaur for explaining the mystery of CAPF service parameters. I also thank Delon, Chris, Paul, and John for making this book possible and making the experience an enjoyable one with teamwork, high standards of excellence, and dedication.

Paul Giralt would like to thank all the technical reviewers for their valuable feedback on Chapter 6.

The authors acknowledge the contribution of the following people for their valuable assistance on this book: Paul Adams, Nitika Agarwal, Tripti Agarwal, Mohammad Al-Taraireh, Faraz Aladin, Steve Anderson, Shivaji Apte, Gene Arantowicz, Ho Bao, Roger Beathard, Bob Bell, Karen Bissani, Luc Bouchard, Barry Bruxvoort, Thomas Chan, Tej Chadha, Gerardo Chaves, Ed Chen, Joanna Chen, Lijun Chen, Rongxuan Chen, Yun-Chung Chen, Bae-Sik Chon, Rita Chow, Yau-Fun Choy, Tony Collins, Craig Cotton, Bret Cullivan, Darrick Deel, Abhijit Dey, David Doherty, Ted Doty, Jay Du, Joe Duffy, Clint Entrop, Abid Fazal, Bill Forsythe, Alex Garbuz, Paul Giralt, Mike Greil, Moises Gonzalez, Manish Gupta, Vikram Gururaj, Addis Hallmark, James He, Scott Henning, Kathryn Holland, John Houston, Grace Hu-Morley, Feng Huang, He Huang, Lee Ji, Joanna Jiang, Vipin Kamra, Devinder Kathuria, Vinod Katkam, Gurdeep Kaur, Holli Kearns, David Kelly, Parameswaran Kumaraswamy, Mohan Kunnamkalath, Jackie Lee, Ron Lewis, Cheryl Li, Shipeng Li, William Liang, Ran Liu, Man Loh, Mark Loney, Zishan Lu, Rex McAnally, Terry McKeon, Kevin McMenamy, Hakim Mehmood, Adam Mermel, Chandra Mulpuri, Charlie Munro, Teresa Newell, Thang Nguyen, Thu Nguyen, Ping Ni, Mariano O’Kon, Jeff Ou, Arvind Patel, Padma Penmetsa, Shamim Pirzada, Richard Platt, Steve Pomeroy, Joe Porcheddu, Arun Ragunathan, Santosh Ransubhe, John Restrick, Chris Rigg, Jan Willem Ruys, Vishwanathan Sahasranamam, Mike Sandman (www.sandman.com/telhist.html), Stephen Sanoff, Susan Sauter, Herb Sayre, Brian Sedgley, Wes Sisk, Eddie Soliman, Chris Spain, James M Stormes, Steve Sun, James Tighe, Steve Toteda, Huot Tran, Ba Trinh, Todd Truitt, Satyam Tyagi, Manoshi Vasudevan, Sohil Virani, Triston Whetten, Martin Wu, Wei Yu, Tony Zhu, Jamie Zhuang.

To the folks at Cisco Press, we thank you. We especially thank Chris Cleveland, John Kane, Jim Schachterle, and Patrick Kanouse for their hard work and dedication to this title: Chris for his attention to detail and quick turnaround; John for keeping us on track and helping manage a difficult schedule; Jim for his professionalism and patience; and Patrick for working so hard to ensure a quality book and buying us the time we needed to get it right.

We also owe our thanks to everyone in the following groups for their contribution to the Cisco IP Communications technology: IPCBU Engineering, Quality Assurance, Integration, Test, CAP, Cisco TAC, Project Management, Technical Marketing, Product Management, Documentation, and Marketing.