SIP - Headers - Tutorialspoint

SIP - Headers ... A header is a component of a SIP message that conveys information about the message. It is structured as a sequence of header fields. SIP header ... Home CodingGround Jobs Whiteboard Tools Business Teachwithus SessionInitiationProtocolTutorial SIP-Home SIP-Introduction SIP-NetworkElements SIP-BasicCallFlow SIP-Messaging SIP-ResponseCodes SIP-Headers SIP-SessionDescriptionProtocol SIP-TheOffer/AnswerModel SIP-Mobility SIP-Forking SIP-Proxies&Routing SIPtoPSTN SIP-Codecs SIP-B2BUA SIPUsefulResources SIP-QuickGuide SIP-UsefulResources SIP-Discussion SelectedReading UPSCIASExamsNotes Developer'sBestPractices QuestionsandAnswers EffectiveResumeWriting HRInterviewQuestions ComputerGlossary WhoisWho SIP-Headers Advertisements PreviousPage NextPage  AheaderisacomponentofaSIPmessagethatconveysinformationaboutthemessage.Itisstructuredasasequenceofheaderfields. SIPheaderfieldsinmostcasesfollowthesamerulesasHTTPheaderfields.HeaderfieldsaredefinedasHeader:field,whereHeaderisusedtorepresenttheheaderfieldname,andfieldisthesetoftokensthatcontainstheinformation.Eachfieldconsistsofafieldnamefollowedbyacolon(":")andthefield-value(i.e.,field-name:field-value). SIPHeaders-CompactForm ManycommonSIPheaderfieldshaveacompactformwheretheheaderfieldnameisdenotedbyasinglelowercasecharacter.Someexamplesaregivenbelow− Header CompactForm To T Via V Call-ID I Contact M From F Subject S Content-Length I SIPHeaderFormat ThefollowingimageshowsthestructureofatypicalSIPheader. HeadersarecategorizedasfollowsdependingontheirusageinSIP− RequestandResponse RequestOnly ResponseOnly MessageBody PreviousPage PrintPage NextPage  Advertisements