Session Initiation Protocol
E523064
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.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Session Initiation Protocol canonical | 6 |
| SIP | 2 |
| 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 NERFINISHED ⓘ |
| 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 NERFINISHED ⓘ |
| hasExtensionFramework | yes ⓘ |
| messageFormat | text-based ⓘ |
| operatesAtLayer | application layer ⓘ |
| revises | RFC 2543 NERFINISHED ⓘ |
| separates |
media
ⓘ
signaling ⓘ |
| standardizedBy | Internet Engineering Task Force NERFINISHED ⓘ |
| 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
NERFINISHED
ⓘ
STUN NERFINISHED ⓘ 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 NERFINISHED ⓘ TLS encryption ⓘ |
| supportsUserAgent |
user agent client
ⓘ
user agent server ⓘ |
| typicallyUsedWith | Real-time Transport Protocol NERFINISHED ⓘ |
| usedFor |
establishing communication sessions
ⓘ
modifying communication sessions ⓘ terminating communication sessions ⓘ |
| usedIn |
IP telephony
ⓘ
Unified Communications NERFINISHED ⓘ Voice over IP ⓘ |
| usedOver | IP networks ⓘ |
| usesDescriptionProtocol | Session Description Protocol NERFINISHED ⓘ |
| usesTransportProtocol |
SCTP
NERFINISHED
ⓘ
TCP NERFINISHED ⓘ TLS NERFINISHED ⓘ UDP NERFINISHED ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Session Initiation Protocol Description of subject: 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.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
P-CSCF
this entity surface form:
SIP
subject surface form:
I-CSCF
this entity surface form:
Session Initiation Protocol (SIP)
this entity surface form:
SIP
subject surface form:
S-CSCF