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Table of ContentsBackCoverSIP-Understanding the Session Initiation Protocol, Second EditionForeword to the First EditionPreface to the Second EditionPreface to the First EditionChapter 1: SIP and the Internet1.2 The Internet Engineering Task Force1.3 A Brief History of SIP1.4 Internet Multimedia Protocol Stack1.5 Utility Applications1.6 DNS and IP Addresses1.7 URLs and URIs1.8 Multicast1.9 ABNF RepresentationReferencesChapter 2: Introduction to SIP2.1 A Simple Session Establishment Example2.2 SIP Call with Proxy Server2.3 SIP Registration Example2.4 SIP Presence and Instant Message Example2.5 Message TransportReferencesChapter 3: SIP Clients and Servers3.2 Presence Agents3.3 Back-to-Back User Agents3.4 SIP Gateways3.5 SIP Servers3.6 Acknowledgment of Messages3.7 Reliability3.8 Authentication3.9 S/MIME Encryption3.10 Multicast Support3.11 Firewalls and NAT Interaction3.12 Protocols and Extensions for NAT TraversalReferencesChapter 4: SIP Request Messages4.2 URI and URL Schemes Used by SIP4.3 Tags4.4 Message BodiesReferencesChapter 5: SIP Response Messages5.1 Informational5.2 Success5.3 Redirection5.4 Client Error5.5 Server Error5.6 Global ErrorReferencesChapter 6: SIP Header Fields6.1 Request and Response Header Fields6.2 Request Header Fields6.3 Response Header Fields6.4 Message Body Header FieldsReferencesChapter 7: Related Protocols7.2 RTP-Real-Time Transport Protocol7.3 RTP Audio Video Profiles7.4 PSTN Protocols7.5 SIP for Telephones7.6 Universal Plug and Play ProtocolReferencesChapter 8: Comparison to H.3238.2 Example of H.3238.3 Versions8.4 Comparison8.5 ConclusionReferencesChapter 9: Wireless and 3GPP9.2 SIP Mobility9.3 3GPP Architecture and SIP9.4 3GPP Header Fields9.5 Future of SIP and WirelessReferencesChapter 10: Call Flow Examples10.2 SIP Call with Stateless and Stateful Proxies with Called Party Busy10.3 SIP to PSTN Call Through Gateway10.4 PSTN to SIP Call Through Gateway10.5 Parallel Search10.6 H.323 to SIP Call10.7 3GPP Wireless Call Flow10.8 Call Setup Example with Two Proxies10.9 SIP Presence and Instant Message ExampleReferencesChapter 11: Future Directions11.1 SIP, SIPPING, and SIMPLE Working Group Design Teams11.2 Other SIP Work Areas11.3 SIP Instant Message and Presence WorkReferencesAppendix A: Changes in the SIP Specification from RFC 2543 to RFC 3261IndexIndex_AIndex_BIndex_CIndex_DIndex_EIndex_FIndex_GIndex_HIndex_IIndex_JIndex_K-MIndex_NIndex_OIndex_PIndex_Q-RIndex_SIndex_TIndex_UIndex_VIndex_W-ZList of FiguresList of Tables