Introduction

Abstract

This chapter provides background information about the book. In particular, it provides an overview of VoIP to make the reader aware of its benefits and growing importance, how it works and factors that affect VoIP quality. We also introduce current VoIP approaches and tools which are used in the real world for VoIP calls and highlight the trends in VoIP and its applications. Finally, we give an outline of the book in relation to VoIP stack to give the reader a deeper insight into the contents of the book.