Introduction

In October 2004, Cisco Systems released Cisco CallManager 4.1(2). CallManager, the heart of the Cisco IP Communications solution, provides administrators a platform by which they can manage their enterprise’s voice communications over the same network on which they manage their enterprise’s data communications. It enables devices that speak dozens of different protocols to communicate together with seeming effortlessness and supports both enterprise and endpoint applications.

We, the writers of this book, have been intimately involved with CallManager since its inception in 1997. And as the years have gone by, we’ve watched as both the capability and the complexity of the product have increased. Features that seemed obvious to us during ...

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