Preface

This book will be your companion when working with OpenSIPS using a case study for an Internet Telephony Service Provider (ITSP). With the help of this book, you should be able to build a system that is able to authenticate, route, bill, and monitor VoIP calls. Topics and advanced scenarios such as TCP/TLS support, load balancing, asynchronous processing, and more are discussed in depth in this book. You will create dynamic dialplans, route calls using advanced routing, integrate OpenSIPS with a media server, account calls and generate CDRs, provision the system using a Web GUI, and use tools to monitor and check the health of your server. You will also learn some advanced topics such as support for TLS/TCP and the newest technology called asynchronous callbacks.

By the end of this book, you should be able to build a system that is able to authenticate, route, bill, and monitor VoIP calls. Whenever you are thinking big on telephony, OpenSIPS is your savior and this book is your friend!