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Understanding Session Border Controllers: Comprehensive Guide to Designing, Deploying, Troubleshooting, and Maintaining Cisco Unified Border Element (CUBE) Solutions by Gonzalo Salgueiro, Kaustubh Inamdar, Steve Holl, Chidambaram Arunachalam, Arunachalam Chidambaram, Kyzer Davis, Felipe Garrido

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Foreword

In the mid-1990s, I began work as a PhD student at Columbia University. These were the early days of the Internet—and it was far from a household name at that point. There was no Google, no Facebook, no Amazon. Email was the primary application for the Internet, used mostly by academics and universities. The Web had just been invented, and was gaining some buzz but was still mostly a toy. Indeed, most Internet technologies were still in the research category, and so I began my own research on a really new technology—voice over IP (VoIP). My PhD advisor, Henning Schulzrinne, was a new faculty member at Columbia. He had some crazy ideas about moving phone calls onto the Internet, and together we worked on this research technology called ...

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