Regional SIP Domains | Twilio

You may create a SIP Domain with the same friendly name and SIP URI in multiple Regions. However, a SIP Domain with a given URI will only be "active" (in the ... TwilioDocs SMS Voice Runtime Video Studio Alldocs... SDKs Help Login Signup SMS Voice Runtime Video Studio Alldocs... SDKs Help Login Signup GlobalInfrastructure Twilio Menu GettingStarted Overview TwilioRegions EdgeLocations Buildinginnon-USRegions Incomingcallroutingforphonenumbers ManagingRegionalResourcesinConsole UsingtheTwilioRESTAPIinanon-USRegion RegionalSIPDomains RegionalSIPTrunks Quickstart:OutboundcallswiththeRESTAPI Quickstart:JavascriptVoiceSDK Quickstart:iOSVoiceSDK MigratingyourapplicationtoanewRegion Reference EdgeLocations Regionsandproductavailability LegacyEdgeLocations(formerlyRegions) FirewallConfigurations ProgrammableVoiceSDKs MediaStreams LocalizedURIs SIPURIs Termination InterconnectSIPURIs InterconnectTermination Collapse Expand Ratethispage: WhencallsarearesenttoorreceivedfromdevicesregisteredwithyourTwilioSIPDomain,theassociatedcalldataisprocessedandstoredwithinaTwilioRegion. ThisguidewillexplaintheimplicationstoyourapplicationofthisRegion-specificprocessingandstorage,andshowyouhowtocontrolwhichTwilioRegionisusedforcallstoandfromyourSIPDomain. SIPDomainsandRegionalRouting BeforeyoucanuseyourSIPDomaininaRegion,youmustfirstcreatetheSIPDomainresourceinthetargetRegion.TolearnhowtomanageRegionalresourcesviatheTwilioConsole,checkoutthisguide. YoumaycreateaSIPDomainwiththesamefriendlynameandSIPURIinmultipleRegions.However,aSIPDomainwithagivenURIwillonlybe"active"(inthesensethatitcanreceiveregistrationsandcalls)inoneRegionatanytime. WhenyouhaveaSIPDomaininmultipleRegions,checkwhichoneisactivebyviewingtheDomain'sconfigurationforaRegioninTwilioConsoleandlookingfortheroutingcard.TochangewhichRegionisactive,clicktheRe-routebuttoninthetargetRegion'sconfiguration. WhicheverRegionisactivewillbetheRegionwheredevicesareregisteredandcallsarehandled. NotethatIPAccessControlListsandCredentialListsarealsoRegion-specific.WhenconfiguringyourSIPDomaininagivenRegion,you'llneedtocreatetheserelatedresourcesinthesameRegion. NowthatyouknowhowtoconfigureandactivateyourSIPDomainintheRegionofyourchoice,let'stakealookatthedifferenttypesofactivitiespoweredbySIPDomains,andseehowtheyeachrelatetoTwilioRegions. RegisterSIPEndpoints BeforeyoucanmakeorreceivecallsviayourSIPDomain,you'llneedtoregisterdeviceswiththedomain. WhenyouregisterSIPdeviceswithyourSIPDomain,theregistrationrecordsarestoredintheTwilioRegionwhereyourSIPDomainiscurrentlyrouted.DevicesregisteredinagivenRegionmayonlyinteractwithCallsthatareprocessedinthesameRegion. Forexample,ifyouhaveadeviceregisteredtoyourSIPDomainIE1,andyouattempttomakeaCalltothedevice'sAORusingtheTwilioAPIinUS1,you'llgetanerrorindicatingthatthedeviceisnotregistered.TosuccessfullymaketheCall,you'llneedtousetheTwilioAPIinIE1.TolearnmoreaboutusingTwilio'sRegionalAPIendpoints,seethisguide. Makecallsfromyourregistereddevices WhenTwilioreceivesaSIPInviterequestfromanendpointregisteredonyourDomain,itcreatesacorrespondingCallrecord,andthenhandlesthecallbasedonyourDomain'swebhookconfiguration.ThisalloccursinwhicheverTwilioRegionyourDomainiscurrentlyroutedto. RequestsareauthenticatedbasedontheIPAccessControlListsandCredentialListsconfiguredforyourDomainintheRegion. MakecallstoyourregistereddevicesviaRESTAPI WhenyourapplicationasksTwiliotoinitiateanoutboundSIPCallfromyourdomainviatheTwilioRESTAPI,theprocessingandstoragerelatedtotheCallwilloccurininthesameRegionthatyousendtheAPIrequestto.TolearnmoreaboutusingtheRESTAPIwithyourtargetRegion,seeourguideonthetopic. MakecallstoyourregistereddevicesviaTwiML AnotherwaytomakeacalltoyourDomain'sregistereddevicesisbyrespondingwithaTwiMLinstructiontoanexistingTwilioCallwebhook.Asyoumightguess,theCallprocessingandstoragefortheresultingSIPcallwilloccurinthesameRegionwheretheTwiMLisprocessed-i.e.theRegionhandlingtheoriginalCall. ConnectingtoalocalEdgeLocationwithlocalizedSIPURIs WhenregisteringdeviceswithyourSIPDomain,youcanconnecttoTwilioviaaspecificEdgeLocationbyusinga"localized"formofyourSIPURI.SeethisreferenceforacompletelistoftheselocalizedURIs. NotethatthelocalizedURIyouselectdoesnotaffectwhichTwilioRegionwillbeusedtoprocessregistrationsandcalls.TheURIitselfaffectsnetworkingressonly,andprocessingRegionisselectedbasedonwhichofyourSIPDomain'sRegionconfigurationsiscurrentlyactive. Ratethispage: Needsomehelp? Wealldosometimes;codeishard.Gethelpnowfromoursupportteam,orleanonthewisdomofthecrowdbyvisitingTwilio'sStackOverflowCollectiveorbrowsingtheTwiliotagonStackOverflow. YouareviewinganoutdatedversionofthisSDK. NextSample ExampleJSONresponse Thankyouforyourfeedback! 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