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GitHub / adamroach / standards
Work related to IETF and W3C efforts
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Created: almost 9 years ago
Updated: 9 months ago
Last pushed: about 5 years ago
Last synced: 9 months ago
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Dependencies
- 1.Introduction *
- 2.1.TransparentTransitofISUPmessages *
- 2.2.UnderstandingofMultipartBodies *
- 2.3.In-BandTransmissionofDTMFinformation *
- 2.4.Out-of-BandTransmissionofDTMFinformation *
- 2.5.ReliableTransmissionofProvisionalResponses *
- 2.6.ProvisionalMediaStreams *
- 2.7.MandatoryProvisionalResponses *
- 2.8.Mid-CallTransactionsWhichdonotChangeSIPState *
- 2.9.CallControlServices *
- 2.IncludedFeatures *
- 200classresponses. *
- 3. *
- 3.1.Values *
- 3.2.Negotiation *
- 4.References *
- 5.SecurityConsiderations *
- 6.Author *
- 851InternationalPkwy. *
- Abstract *
- Aclientwhichsupportsbutdoesnotrequiretheextensions *
- AdamRoach *
- Additionally ,sinceeachextensionmayadduptotwoadditional
- Allnodeswhichacceptorgeneratethe *
- Allnodeswhichacceptthe *
- Allnodeswhichgenerateoracceptthe *
- Allnodeswhichgeneratethe *
- AllnodeswhichserveasSIP *
- Aspreviouslymentioned ,thetransmissionofprovisional
- Category *
- Digits ,TelephonyTonesandTelephonySignals
- Draft <draft
- E-Mail *
- EricssonInc. *
- ExpiresJanuary2000 *
- Fax *
- Feb.1999.Workinprogress. *
- IETF *
- INFOmessages *
- INFOrequestsasnon-fatal. *
- INVITErequest.TheclientMAYcachethefactthatthepathtoa *
- INVITErequestcontainssufficientinformationtouniquely *
- ISUPmessagesunderanycircumstances *
- If ,uponre
- Ifaserverrequirestheextensionsdescribedinthisdocument *
- Ifaserversupportsbutdoesnotrequiretheextensionsdefined *
- Implemented *
- Inadditiontotheneedtofaithfullycarrytelephonytones *
- InmostPSTNinterworkingsituations ,theSIPbodywillbe
- Internet-Drafts. *
- Internet-Draftsaredraftdocumentsvalidforamaximumofsix *
- Internet-DraftsareworkingdocumentsoftheInternetEngineering *
- InternetDraft <draft
- InternetDraftEricssonInc. *
- InternetDraftJune1999 *
- InternetEngineeringTaskForceAdamRoach *
- Ithasnotyetbeenmadeclearwhichoftheseextensionsare *
- June *
- MailstopL-04 *
- Mediagatewaysmayclaimfullcompliancewiththisdocumentif *
- NOTIFYextensionsmentionedaboveorallowSUBSCRIBEandNOTIFY *
- NodeswhichdonotperformPSTNinterworkingarenotrequiredto *
- NodeswhichdoperformPSTNinterworkingSHOULDunderstandand *
- NodeswhichdoserveasPSTNinterworkingpointsSHOULDaccept *
- Notethattheheadersdefinedinthisdocumentwillbeused *
- PSTNnodeswillneedtosendmessageswhichdonotcorrespondto *
- Phone *
- Proxieswhichacceptthe *
- Proxyserverswhichacceptthe *
- ResponsesinSIP *
- Richardson ,TX75081
- Roach *
- SHOULDrespondwitha *
- SIPPSTNInterworkingUmbrella *
- SessionInitiationProtocol *
- ShadowDirectoriesonftp.is.co.za *
- Sinceprovisionalmessages ,suchas
- Sincethecodecselectedforvoicetransmissionmaynotbe *
- StatusofthisMemo *
- TaskForce *
- TelephonyTonesandTelephonySignals *
- Thefollowingsectionsoutlinetheextensionsrequiredfor *
- Theheadervaluedefinedforthepurposeofdenotingtheneedfor *
- Themethodforindicatingprotocolextensionsisthatdescribed *
- TherehavebeenanumberofextensionstotheSIPprotocol *
- ThisdocumentisanInternet-Draftandisinfullconformance *
- ThisdocumentoutlinesanewvaluefortheSIP *
- Thisdraftseekstoalleviatetheseproblemsbyaddingthe *
- Thismemoaddsnosecurityconsiderationsbeyondthoseapplicable *
- Thosenodeswhichdonothavedirectcontrolovertheaudio *
- Toallowthetransmissionofmessagesandtonesbeforeafinal *
- Toallowtransitofsuchmethods ,proxieswhichacceptthe
- Tofacilitatetheimplementationofvalue-addedservices ,manyof
- Toprovideuserstheabilitytotakeadvantageofthefullrange *
- ToviewtheentirelistofcurrentInternet-Drafts ,pleasecheck
- UAC *
- USA *
- WheninterworkingwithPSTN ,thereareseveralsituationswhen
- Workinprogress. *
- acrosstheaudiochannel ,PSTNinterworkingsituationswill
- allowINFOmessagestobecarriedbetweenendpoints.Exceptions *
- anerrorcode. *
- anySIPoperationstoeachotheracrossaSIPnetwork. *
- applicable. *
- appropriate *
- appropriateheaders. *
- asdefinedinthepreviouslyreferenceddocument. *
- asreferencematerialortocitethemotherthanas *
- beencollected ,thereliabletransmissionofsuchmessagesis
- behaviorisoutlinedin *
- between180and199inclusiveonceithasdeterminedthatthe *
- beusedbymostPSTNinterworkingimplementationstotrigger *
- billinginformation. *
- bodieswithmultiplepayloads ,theriskofoverflowinganMTU
- butreceivesnoappropriate *
- callcontrolservices. *
- capabilitytoimplyasetofSIPextensionsnecessaryfor *
- clients ,andonlyplacerequirementsonthosenodeswhich
- codeSHOULDthenautomaticallyre-issuetheINVITErequestwith *
- connectionhasbeenestablished ,SIPnodeswhichinterworkwith
- consistentlybyclients. *
- definedinthisdocumentMUSTeitherunderstandtheSUBSCRIBEand *
- definedinthisdocumentMUSTunderstandtheextensionsdefined *
- definedinthisdocumentMUSTunderstandthemultipartbody *
- definedinthisdocumentSHOULDNOTbehaveinawaytopreclude *
- definedinthisdocumentandhavedirectcontrolovertheaudio *
- definedinthisdocumentwillrespondtoany100or200class *
- deliverremotering-tone *
- designedfortransportofDTMFinformation.Thisdocumentisnot *
- documentMUSTprovidefortransparenttransmissionofISUP *
- documentsatanytime.ItisinappropriatetouseInternet-Drafts *
- duringUDPcommunicationsisbecomingapotentialproblem. *
- duringthisperiod. *
- electstoblocktransmissionoftheINFOmessage ,itSHOULD
- expectedtobesupportedbynodeswhichneedtointeroperatewith *
- extensiondefinedin *
- extensionsarenotedasappropriate. *
- factthataparticularURIsupportsPSTNinterworkingextensions. *
- fatalerrors. *
- fromtheIANAatalaterdate.Clientsunderstandingthewarning *
- ftp.isi.edu *
- full-featuredPSTNinterworkingandtherationalefortheir *
- fully-functionalPSTNinterworkingwithasinglepairof *
- furtherdigitsfromtheenduser.Thismaybeused ,forexample,
- gateway. *
- generate *
- generateoracceptthe *
- generatepacketsoftype *
- generationofmessagesindicatingthatacompleteaddresshas *
- headers ,andmanycallsinvolvinginterworkingwillbecarrying
- however ,theyMUSTnottreatreceiptofsuchpacketsasanerror.
- however ,stillallowable.
- ideallysuitedforcarryingDTMFinformation ,asymbolicmethod
- identifyanenddevice. *
- implementtheextensiondefinedin *
- in *
- includeproxieswhichserveaspolicyenforcementpointsbetween *
- includetheextensionnameinbotha *
- inclusion.NotethatsomefeaturesdonotapplytonativeSIP *
- inprogress. *
- insections6.28and6.30of *
- insteadof ,notinadditionto,the
- interfacewiththeexistingtelephonyinfrastructure.These *
- interworkingpointsarenotrequiredtogenerateorunderstand *
- interworkingpointsarenotrequiredtounderstandorgenerate *
- interworksmoothlywithexistingtelephonynetworks. *
- inthisdocumentandreceivesanINVITEwhichdoesnotcontainan *
- mentioned *
- messagescontainingtheabovementioned *
- messagesinthebodyofSIPmessagestotrustedclients.This *
- messageswillneedtocarryISUPpayloadsfromgatewayto *
- monthsandmaybeupdated ,replaced,orobsoletedbyother
- munnari.oz.au *
- non-trustedclients. *
- ofservicesaffordedbytheexistingtelephonenetworkwhen *
- oftransmittingthisinformationin-bandisnecessary. *
- othergroupsmayalsodistributeworkingdocumentsas *
- particularURIdoesnotsupportPSTNinterworkingextensions.If *
- phase. *
- placedonthembythissection. *
- placingcallsfromPSTNtoPSTNacrossaSIPnetwork ,SIP
- policyenforcementpointsbetweenproviders *
- precautionstoensurethatitdoesnotbecomelockedinaloop *
- previouslyreferenceddocument ,whenandifsuchpayloadsare
- progress. *
- providers *
- re-issuingtheINVITErequestwithanappropriatesetof *
- ref *
- representingDTMFinformationasdefinedin *
- requestsandresponsestopassbetweenendpoints. *
- requiredtocarrysessioninformationinadditiontoISUPand *
- requiredtointerpretanyoftheextendedRTPpayloadsignalling *
- requirethecapabilityonthepartofSIPnodestocollect *
- response *
- responsesservesanimportantroleinPSTNinterworking *
- return *
- silentlydiscardanyISUPbodiesorbodypartswithoutgenerating *
- situations.Tothisend ,suchresponsesarerequiredtobeused
- stream *
- streamSHOULDbecapableofgeneratingin-bandsignalling *
- streamSHOULDunderstandtheSUBSCRIBEandNOTIFYextension *
- streams ,asspecifiedin
- suchinformationisnotcached ,theclientMUSTtakeother
- the *
- thePSTN. *
- thePSTNneedtobeabletoestablishtemporarymediaconnections *
- thePSTNnetwork.Mostofthesearenegotiatedbymeansof *
- theaboveservicesis *
- theextensionsdescribedinthisdocument ,theclientMUST
- thetransmissionofISUPbodies *
- theygenerateandunderstand *
- thisdocumentMUSTbehaveinsuchawayastonotprecludethe *
- thisdocumentMUSTgenerateaprovisionalresponsewithacode *
- thisdocumentMUSTsupportreceiptoftemporaryprovisionalmedia *
- throughuntouched.Exceptionsincludeproxieswhichserveas *
- toprovideauthenticationinformationtoaSIPnodeviaDTMF. *
- tothereferenceddocuments. *
- transmissionofmultipartbodies. *
- transmitprovisionalmediastreamswheneverappropriate *
- valuedefinedinthisdocumentbutdonotserveasPSTN *
- veryimportanttopreventcallsfromtimingoutduringthesetup *
- whichdenotescompliancewithanumberofmechanismsnecessaryto *
- whichrequiresomedegreeofthirdpartycallcontrol ,units
- whichsupportPSTNinterworkingwillalsoneedtosupportbasic *
- withallprovisionsofSection10ofRFC2026. *
- yetwritten. *