Support for Request URI Parameters in SIP INVITE Messages

The Request URI Parameters TLV (0x2958) carries all the Request URI parameters, received by the CSP SIP stack in the Request for Service with Data message ( ... Youarehere:CSPDeveloper’sGuide:InternetProtocol > 5 Session-InitiationProtocol(SIP)Software > SupportforRequestURIParametersinSIPINVITEMessages SupportforRequestURIParametersinSIPINVITEMessages Overview ThisfeatureallowshostapplicationdeveloperstousetheEXSAPItowriteandaccessproprietaryRequestURIparametersthatextendSIPmessagesforcarryingapplication-specificinformation. Description SIPRequestURIParameterTLV(0x2958)supportsthisfeatureforInboundandOutboundcalls,asexplainedbelow. InboundCalls TheRequestURIParametersTLV(0x2958)carriesalltheRequestURIparameters,receivedbytheCSPSIPstackintheRequestforServicewithDatamessage(0x002D)tothehostapplication. ToreportthisTLVtothehost,youmustprogramBit6intheSIPMessageInformationMaskTLV(0x027F)usedintheVoIPProtocolConfiguremessage(0x00EE). ExampleofInboundCall Inthefollowingexample,theitalictextintheSIPmessagerepresentstheURIparameterscontainedintheRequestforServicewithDatamessage(0x002D). X->H [012a002d00df0400010d0303fe1d003301030033 01160018274e00020005277e000308000029 1900053131313100291b000c31302e312e32 30352e323500291c0004000013c429230005 32323232002925000c31302e312e3230352e 31350029260004000013c4292d001a323232 323b746772703d226c6f63616c3d74673132 3334352200292f000c31302e312e3230352e 31350029300004000013c429330001012718 000702000000042222271700050200041111 279400040a01cd4f279500040000118027b0 0002000227b1000200042916000101295400 18313131313b746772703d6c6f63616c3d74 673534333231002955000c31302e312e3230 352e32350029560004000013c42935001722 6c7563656e743d657863656c3d74656c6563 6f6d2200295300020100]   X->H [00450043009e0400010d0303fe1d00a700230103 0033002f0002295300020201295800237467 72703d676c6f6162616c3d7461676c756365 6e74657863656c7369703530303000]   Receivedmessage: INVITEsip:1111;[email protected]:5060; tgrp=gloabal=taglucentexcelsip5000SIP/2.0 Via:SIP/2.0/UDP10.1.205.15 To:1111<1111> From:2222<2222>;tag=204846324c0 Call-ID:[email protected] Contact:2222<2222> User-Agent:Excel_CSP/82.30.70 Supported:timer Session-Expires:65535 Min-SE:65534 CSeq:1INVITE Content-Type:application/sdp Content-Length:137   v=0 o=sip00INIP410.1.205.15 s=SIP_Call c=INIP410.1.205.79 t=00 m=audio4480RTP/AVP096 a=rtpmap:96telephone-event/8000     OutboundCalls HostapplicationdeveloperscanusetheRequestURIParameters0x2958TLVintheRouteControlandOutseizeControlmessagestoinsertRequestURIparametersinSIPINVITEmessages. ExampleofOutboundCall Inthefollowingexample,theitalictextintheSIPmessagerepresentstheURIparametersthatthehostapplicationinsertedusingtheRouteControlmessage(0x00E8). H->X [007100e80000ff00012902fffe0203001e00 190004001300020008000800020065000f00 010b00650002000003003300420004277e00 030800002717000510000411112958001374 6772703d6c6f63616c3d7467353433323100 29350015746772703d226c6f63616c3d7467 31323334352200]   SIP:   INVITEsip:[email protected]:5060;tgrp=local=tg54321SIP/2.0 Via:SIP/2.0/UDP10.10.1.31 To:1111<1111> From:00000000<00000000>;tag=17197953780 Call-ID:[email protected] Contact:00000000<00000000> User-Agent:Excel_CSP/82.20.114 Supported:timer Session-Expires:1800 Min-SE:300 CSeq:1INVITE Content-Type:application/sdp Content-Length:99   v=0 o=sip00INIP410.10.1.31 s=SIP_Call c=INIP410.10.1.37 t=00 m=audio14876RTP/AVP0     Session-InitiationProtocol.AsignalingprotocolusedforestablishingsessionsinanIPnetwork.Asessioncouldbeasimple,two-waytelephonecall,oritcouldbeacollaborativemulti-mediaconferencesession. Tag-Length-Valueblock.AstandardizedblockthatallowsdatatoinsertedinastandardwayintoAPImessages. VoiceoverInternetProtocol.Thedeliveryofvoiceinformationindigitalformindiscretepacketsratherthaninthetraditionalcircuit-committedprotocolsofthepublic-switchedtelephonenetwork(PSTN). Real-TimeTransportProtocol.Supportstransportofreal-timedatalikeinteractivevoiceandvideooverpacket-switchednetworks. InPPL,aconditionthat,whenmet,drivesastatemachine(PPLComponent)fromonestatetoanother,byinvokinganassociatedPrimitive.InPPLfiles,anEventismarkedbyanarrowandtext. Acomputer,attachedtotheExcelplatformthroughanRS-232orEthernetlink,fromwhichyourunthetelecommunicationsapplicationthatcontrolstheExcelplatform. Outgoingcallsetupduringreal-timecallprocessingonaspecificchannel.