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Chapter 19. Media Servers and Conferenci... > Framework for Conferencing with SIP

19.4. Framework for Conferencing with SIP

RFC 4353 presents a general SIP-centric architectural model and terminology in order to address tightly coupled conferencing services.

The key element in this architecture is called the focus. The focus is a functional element that represents a SIP UA responsible for maintaining a SIP signaling relationship with each participant in the conference, and making sure, through the use of some mixers under its control, that the media is properly distributed among the participants.


  

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