About the Authors

Salvatore Collora, CCIE No. 4321, is a network consulting engineer for Cisco Systems Advanced Services, who specializes in implementing IP telephony and security in large customer networks. He has deployed many large CallManager-based IP telephony networks and often works in emergency situations to fix improper installation and configuration of CallManager. He is the author of Cisco: A Beginner's Guide (ISBN: 0-07219-385-9) and is the coauthor of Using Microsoft Exchange Server (ISBN: 0-78970-687-3). He was a technical editor on CCNA 2.0 All-in-One Exam Guide (ISBN: 0-07212-998-0), and has written numerous articles on technology for publications such as PCWeek (now eWeek). He lives in Los Angeles with his wife and two children.

Ed Leonhardt, CCIE No. 3264, is a consulting systems engineer and serves as a full-time technical lead in the Enterprise/Service Provider Technology Leadership Program at Cisco Systems. He joined Cisco Systems in 1996 and currently drives new product requirements to the individual product teams, helps with messaging from the product teams to the Cisco field teams, and guides overall system engineer (SE) development in the IPT space. Ed has been a long-term advocate of IP telephony since the Selsius Systems acquisition in 1998 and now helps guide the evolving voice product set across Cisco. He has designed and installed networks on airplanes, Humvees, ships, and land, built from anything ranging from arc-net over broadband to Gigabit Ethernet for customers such as the Department of Defense and the single home office user.

Anne Smith is a technical writer in the CallManager engineering group at Cisco Systems. She joined Cisco in 1998 as part of the Selsius Systems acquisition, and writes internal and external documents for CallManager, IP phones, and other Cisco IP Telephony products. She holds a bachelor's degree in language and literature. Anne is a coauthor of Cisco CallManager Fundamentals (ISBN: 1-58705-008-0), Developing Cisco IP Phone Services (ISBN: 1-58705-060-9), and Troubleshooting Cisco IP Telephony (ISBN: 1-58705-075-7), all in the Cisco AVVID Solution series of books from Cisco Press.