Cisco CallManager Fundamentals, Second Edition, provides readers with referential information on Cisco CallManager, the software component of the Cisco IP Telephony solution. It is the only available book and documentation on the server-side of Cisco CallManager and is completely updated to cover the latest software release, containing vast architectural information that enables readers to understand how Cisco CallManager processes calls. With this book, readers can architect their networks and diagnose/troubleshoot CallManager issues by gaining a deeper understanding the system. The book is organized by the major pieces of CallManager - Chapter 1 discusses architecture; Chapter 2 details call routing; Chapter 3 addresses station devices; Chapter 4 describes voice gateways; Chapter 5 explains how CallManager processes media; Chapter 6 explains manageability and monitoring tools; Chapter 7 describes call detail records. The Appendices describe CallManager features, solutions that integrate with CallManager, and the signaling protocol CallManager employs. New chapters discuss system tuning, security, and provide use cases for features. The use cases help readers understand how they can utilize or combine features to achieve business goals.