Day: July 13, 2013

SIP VoIP system architecture basics

Infrastructure RequirementsIntegral Components of a VOIP SIP based architectureSIP GatewaysRegistrar ServerProxy ServerRedirect ServerApplication Server Adding Media ManagementDTMF( Dual tone Multi Frequency )TTS ( Text to Speech ) Developing SIP based applicationsBasic SIP methodsExtending SIP headersCall routing ScriptsSIP platform DevelopmentCollecting and Processing PCAPS NAT and DNS Near-end NAT traversal Far-end NAT traversalCDR Processing and BillingData Streams … Continue reading SIP VoIP system architecture basics

SIP ( Session Initiation Protocol )

SIP - Application layer protocolSIP RequestsSIP responsesSession Description Protocol  (SDP)SIP transactions, dialog , branchMatching in-dialog transactions/requestsRecord Routing strict routingloose routing Mobility and Location ServiceNetwork Address Translator ( NAT)Far End TraversalNear End TraversalSIP Call Flows RegisterationCall RedirectionForkingclick to Dial SIP for Instant Messaging and Presence Leveraging Extensions ( SIMPLE) Update : At the time of writing … Continue reading SIP ( Session Initiation Protocol )