中国电信SIP规范第二部分(协议细则)

SIP-----1-SIPSIP20031231SIP----23.1SIP:SessionInitiationProtocol[RFC3261]....................................................................43.2ReliabilityofProvisionalResponsesintheSessionInitiationProtocol(SIP)[RFC3262]....333.3AnOffer/AnswerModelwiththeSessionDescriptionProtocol(SDP)[RFC3264].............353.4SessionInitiationProtocol(SIP)-SpecificEventNotification[RFC3265]..........................384.1MIMEmediatypesforISUPandQSIGObjects[RFC3204]...........................................434.2TheSIPINFOMethod[RFC2976]...............................................................................444.3RequirementsforInterworkingBICC/ISUPNetworkwithOriginating/DestinationNetworksbasedonSessionInitiationProtocolandSessionDescriptionProtocol[TRQ.2815].................454.4InterworkingbetweenSessionInitiationProtocol(SIP)andtheBearerIndependentCallControlProtocolorISDNUserPart[Q.1912.5]..................................................................474.4.1ISUP............................................................................625.1invite................................................................................................................665.2ACK........................................................................................................................675.3BYE........................................................................................................................675.4CANCEL.................................................................................................................695.5REGISTER...............................................................................................................695.6OPTIONS.................................................................................................................705.7INFO.......................................................................................................................715.8PRACK....................................................................................................................72SIP----31SIPSIPSIPSIP2SIPlmustmustnotshouldmayllSIPlSIPll---SIP----43SIP3.1SIP:SessionInitiationProtocol[RFC3261]SIPUASIP-ISUPB2BUA1Introduction---------------2OverviewofSIPFunctionality---------------3Terminology---------------4OverviewofOperation---------------5StructureoftheProtocol---------------6Definitions---------------7SIPMessages---------------7.1Requests---------------7.2Responses---------------7.3HeaderFields---------------7.3.1HeaderFieldFormat---------------7.3.2HeaderFieldClassification---------------7.3.3CompactForm---------------7.4Bodies---------------7.4.1MessageBodyType---------------SIP----5SIPUASIP-ISUPB2BUA7.4.2MessageBodyLength---------------7.5FramingSIPmessages---------------SIP----6SIPUASIP-ISUPB2BUA8GeneralUserAgentBehavior---------------1.UserAgentproxyUACUAS16UACUAS162.1ProxyProxyUACUASUACUASProxySIP----7SIPUASIP-ISUPB2BUA8.1UACBehavior---------------8.1.1GeneratingtheRequest8.1.1.1Request-URI8.1.1.2To1Tel-URL,SIPS-URI2B2BUAtoSIPURI8.1.1.3From1B2BUAfromSIPURI2fromuserinfo@hostporthostIP3SIP-ISUPUNISIP-ISUPSIP----8SIPUASIP-ISUPB2BUA8.1.1.4Call-ID1bootcycleCall-id8.1.1.5Cseq8.1.1.6Max-Forwards8.1.1.7Via8.1.1.8Contact1B2BUAInviteContactusername@hosthostB2BUA2.B2BUA20018*contactcontactusername@hosthostB2BUA8.1.1.9SupportedandRequire8.1.1.10AdditionalMessageComponents8.1.2SendingtheRequestSIP----9SIPUASIP-ISUPB2BUA8.1.3ProcessingResponses8.1.3.1TransactionLayerErrors8.1.3.2UnrecognizedResponses8.1.3.3Vias8.1.3.4Processing3xxResponses1ContacSIPS-URI2SIP-ISUPContac33804SIP-ISUPB2BUA3**inviteToSIPURIFromSIPURICall-id,Cseq5Proxy3**invitefromtocall-idcseq8.1.3.5Processing4xxResponsesSIP-ISUP401407SIP----10SIPUASIP-ISUPB2BUA8.2UASBehavior8.2.1MethodInspection8.2.2HeaderInspection8.2.2.1ToandRequest-URITel-URI8.2.2.2MergedRequests8.2.2.3Require8.2.3ContentProcessing8.2.4ApplyingExtensions8.2.5ProcessingtheRequestREGISTER4**8.2.6GeneratingtheResponse---------------8.2.6.1SendingaProvisionalResponse8.2.6.2HeadersandTags8.2.7StatelessUASBehaviorUASSIP----11SIPUASIP-ISUPB2BUA8.3RedirectServers1.RedirectServerUASSIP-ISUPB2UBA2.Redirect3.9CancelingaRequest1Cancelinvite9.1ClientBehavior1InviteearlydialogSIP-ISUPBYE9.2ServerBehavior10Registrations---------------1.SIP-ISUPB2BUA10.1Overview---------------SIP----12SIPUASIP-ISUPB2BUA10.2ConstructingtheREGISTERRequest1.bootcycleCall-id10.2.1AddingBindings10.2.1.1SettingtheExpirationIntervalofContactAddresses10.2.1.2PreferencesamongContactAddresses10.2.2RemovingBindings10.2.3FetchingBindings10.2.4RefreshingBindings10.2.5SettingtheInternalClock10.2.6DiscoveringaRegistrar1210.2.7TransmittingaRequest10.2.8ErrorResponses10.3ProcessingREGISTERRequests1SIP----13SIPUASIP-ISUPB2BUA11QueryingforCapabilities1.OPTIONSSIP-ISUPB2BUAProxy2.OPTIONSOPTIONS11.1ConstructionofOPTIONSRequest11.2ProcessingofOPTIONSRequest12DialogsTLSbooleanflagsecure12.1CreationofaDialog12.1.1UASbehavior1.TLSSIPS-URI2.12.1.2UACBehaviorTLSSIPS-URISIP----14SIPUASIP-ISUPB2BUA