SIP (Session Initiation Protocol): Difference between revisions

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Line 1: '''''SIP (Session Initiation Protocol)''''' is a protocol specified by the [[IETF (Internet Engineering Task Force)\|IETF]] (RFC 3261) that defines a method for establishing multimedia sessions over the Internet. Used as the call signaling protocol in VoIP, NENA i2, and NENA i3. {\| class="wikitable sortable" Line 23: \|A SIP transaction used to initiate a session. \|- \|'''''~~reINVITE~~re-INVITE''''' \|A SIP INVITE transaction within an established session used to change the parameters of a call or refresh a session. See INVITE. \|- \|'''''Method''''' Line 40: \|'''''OPTIONS''''' \|A SIP method used to request the SIP protocol options supported by an endpoint. \|- \|'''''P-A-I (P-Asserted-Identity)''''' \|A header field in a SIP message containing a URI that the originating network asserts is the correct identity of the caller. '''<u>Also known as</u>: ''PAI''''' \|- \|'''''REFER''''' Line 47 ⟶ 51: \|That part of a SIP message that indicates where the call is being routed towards. SIP Proxy servers commonly change the Request ID (“retargeting”) to route a call towards the intended recipient. \|- \|'''''~~Resource~~RPH (Resource-Priority Header)''''' \|A header field used on SIP calls to indicate priority that proxy servers give to specific calls. The Resource -Priority header field does not indicate that a call is an emergency call (see ~~RequestURI~~Request-URI). \|- \|'''''REGISTER''''' Line 68 ⟶ 72: {{RelevantNENADocs}} '''NENA-STA-010''', NENA i3 Standard for Next Generation 9-1-1 ~~[https://www.nena.org/page/i3_Stage3 NENA-STA-010, Detailed Functional and Interface Standards for the NENA i3 Solution]~~ <br /> {{External References}} [https://tools.ietf.org/html/~~rfc:3261~~rfc3261 RFC 3261, SIP: Session Initiation Protocol] [https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-sip/34204410-fb7e-4f02-8360-a6e225b34549#:~:text=An%20SIP%20message%20is%20either,methods%20are%20INVITE%20and%20BYE. Microsoft Glossary] [[Category:Glossary]]