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    Part I: Fundamentals > SIP Overview

    Chapter 4. SIP Overview

    In this chapter, we will introduce SIP. First of all, we will define some key concepts in the SIP framework, such as sessions and addressing. Then the main functions of the protocol will be presented. After that, we will describe the different SIP entities in the SIP architecture. We will also show a first example of how the SIP entities are involved in a basic SIP call.


      

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