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SIP ↠  ExamplesGrammarsPresence ⇾  MainServicesTransactionDialogIMS
in RFC 3261   None   None   Next
RFC 3261's main example: SIP Register and Session set_up sequence chart
This is the representation, as a slideshow, of the SIP examples (Registration and Session Set-up)
outlined in RFC 3261 chapter 4, and detailed in chapter 24.