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Chapter 4. SIP and the User Directory

In the previous chapter, we briefly introduced SIP, the Session Initiation Protocol, where we discussed how to register a telephone with FreeSWITCH. In this chapter, we will build upon that foundation and learn more about how we use SIP to connect users, both locally and around the world. SIP is a ubiquitous protocol in the VoIP landscape. In this chapter, we will cover the following topics:

  • Learning the principles behind the FreeSWITCH user directory
  • Exploring and configuring the FreeSWITCH user directory for the first time
  • Learning how to connect FreeSWITCH to service providers
  • Making modifications to the Dialplan and directory XML configuration
  • Briefly discussing SIP profiles and user agents
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