Making a VoIP Call with SIP Methods

Now that we've briefly covered SIP methods, let's walk through an example of a VoIP call using the methods. The following steps highlight a sample VoIP call using SIP. The call involves two users, their User Agents (Sonia and Kusum), and their required intermediate systems. Figure 2-1 illustrates the step-by-step process.

Sample VoIP call using SIP

Figure 2-1. Sample VoIP call using SIP

Registration

First, SIP User Agent Sonia registers with the Registrar in its domain (Aum.com), and SIP User Agent Kusum registers with the Registrar in its ...

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