Session Initiation Protocol

E523064

application-layer protocol signaling protocol

Session Initiation Protocol (SIP) is a signaling protocol used to establish, modify, and terminate real-time communication sessions such as voice and video calls over IP networks.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (4)

Label	Occurrences
Session Initiation Protocol canonical	21
SIP	12
SIP PRACK	1
Session Initiation Protocol (SIP)	1

How this entity was disambiguated

This entity first appeared as the object of triple T5480457 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Session Initiation Protocol
Context triple: [P-CSCF, usesProtocol, Session Initiation Protocol]

A. SIP
SIP is the IATA airport code for Simferopol International Airport, the main air gateway to the Crimean Peninsula.
B. H.323
H.323 is an ITU-T standard that defines protocols for voice, video, and data communication over packet-based networks such as IP.
C. VoIP
VoIP (Voice over Internet Protocol) is a technology that enables voice communications and multimedia sessions to be delivered over Internet Protocol (IP) networks instead of traditional telephone lines.
D. IP Multimedia Subsystem
IP Multimedia Subsystem is a standardized architectural framework used by telecommunications networks to deliver IP-based multimedia services such as voice, video, and messaging over both fixed and mobile infrastructures.
E. H.248
H.248 is an ITU-T protocol, also known as Megaco, used for controlling media gateways in next-generation and IP multimedia networks.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Session Initiation Protocol
Target entity description: Session Initiation Protocol (SIP) is a signaling protocol used to establish, modify, and terminate real-time communication sessions such as voice and video calls over IP networks.

A. SIP
SIP is the IATA airport code for Simferopol International Airport, the main air gateway to the Crimean Peninsula.
B. H.323
H.323 is an ITU-T standard that defines protocols for voice, video, and data communication over packet-based networks such as IP.
C. VoIP
VoIP (Voice over Internet Protocol) is a technology that enables voice communications and multimedia sessions to be delivered over Internet Protocol (IP) networks instead of traditional telephone lines.
D. IP Multimedia Subsystem
IP Multimedia Subsystem is a standardized architectural framework used by telecommunications networks to deliver IP-based multimedia services such as voice, video, and messaging over both fixed and mobile infrastructures.
E. H.248
H.248 is an ITU-T protocol, also known as Megaco, used for controlling media gateways in next-generation and IP multimedia networks.
F. None of above. chosen

Statements (74)

Predicate	Object
instanceOf	application-layer protocol ⓘ signaling protocol ⓘ
abbreviation	SIP ⓘ linked to: Session Initiation Protocol
definedInRFC	RFC 3261 ⓘ
designGoal	extensibility ⓘ integration with Internet applications ⓘ mobility support ⓘ scalability ⓘ
extendedBy	SIP REFER method ⓘ SIP UPDATE method ⓘ SIP for Instant Messaging and Presence Leveraging Extensions ⓘ
hasExtensionFramework	yes ⓘ
messageFormat	text-based ⓘ
operatesAtLayer	application layer ⓘ
revises	RFC 2543 ⓘ
separates	media ⓘ signaling ⓘ
standardizedBy	Internet Engineering Task Force ⓘ
supportsAddressingScheme	SIP URI ⓘ SIP address-of-record ⓘ
supportsCommunicationType	instant messaging ⓘ multimedia ⓘ presence ⓘ video ⓘ voice ⓘ
supportsMethod	ACK ⓘ BYE ⓘ CANCEL ⓘ INFO ⓘ INVITE ⓘ NOTIFY ⓘ OPTIONS ⓘ PRACK ⓘ PUBLISH ⓘ REGISTER ⓘ SUBSCRIBE ⓘ UPDATE ⓘ
supportsMobilityFeature	call routing ⓘ user location ⓘ user registration ⓘ
supportsNATTraversalExtension	ICE ⓘ STUN ⓘ TURN ⓘ
supportsNetworkElement	proxy server ⓘ redirect server ⓘ registrar ⓘ
supportsProxying	yes ⓘ
supportsQoSMechanism	resource reservation signaling via SDP ⓘ
supportsRedirect	yes ⓘ
supportsReliabilityExtension	PRACK ⓘ
supportsResponseCodeClass	1xx provisional ⓘ 2xx success ⓘ 3xx redirection ⓘ 4xx client error ⓘ 5xx server error ⓘ 6xx global failure ⓘ
supportsSecurityMechanism	Digest authentication ⓘ S/MIME ⓘ TLS encryption ⓘ
supportsUserAgent	user agent client ⓘ user agent server ⓘ
typicallyUsedWith	Real-time Transport Protocol ⓘ linked to: RTP: A Transport Protocol for Real-Time Applications
usedFor	establishing communication sessions ⓘ modifying communication sessions ⓘ terminating communication sessions ⓘ
usedIn	IP telephony ⓘ Unified Communications ⓘ Voice over IP ⓘ
usedOver	IP networks ⓘ
usesDescriptionProtocol	Session Description Protocol ⓘ
usesTransportProtocol	SCTP ⓘ TCP ⓘ linked to: Transmission Control Protocol TLS ⓘ UDP ⓘ

How these facts were elicited

Referenced by (35)

Full triples — surface form annotated when it differs from this entity's canonical label.

P-CSCF → usesProtocol → Session Initiation Protocol ⓘ

subject linked to: P‑CSCF

BGCF → relatedTo → Session Initiation Protocol ⓘ

SDES → associatedWith → SIP ⓘ