H.450 supplementary services
E663664
H.450 supplementary services are a set of ITU-T recommendations that define additional call control and feature capabilities—such as call transfer, call forwarding, and call hold—for multimedia communication systems based on the H.323 standard.
All labels observed (1)
| Label | Occurrences |
|---|---|
| H.450 supplementary services canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7428287 — 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: H.450 supplementary services Context triple: [H.323, includes, H.450 supplementary services]
-
A.
AVE high-speed services
AVE high-speed services are Spain’s premier long-distance high-speed train operations, connecting major cities at speeds of up to 300 km/h.
-
B.
HSPA
HSPA is a family of mobile broadband technologies that enhance 3G networks by significantly increasing data transfer speeds and overall network performance.
-
C.
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.
-
D.
Special Telecommunications Service (historically associated)
The Special Telecommunications Service is a Romanian government agency responsible for securing and managing the state’s special communications and information systems, historically linked to the national intelligence service.
-
E.
HLR
HLR (Home Location Register) is a central database in mobile networks that stores and manages subscriber information, authentication data, and location details for GSM users.
- 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: H.450 supplementary services Target entity description: H.450 supplementary services are a set of ITU-T recommendations that define additional call control and feature capabilities—such as call transfer, call forwarding, and call hold—for multimedia communication systems based on the H.323 standard.
-
A.
AVE high-speed services
AVE high-speed services are Spain’s premier long-distance high-speed train operations, connecting major cities at speeds of up to 300 km/h.
-
B.
HSPA
HSPA is a family of mobile broadband technologies that enhance 3G networks by significantly increasing data transfer speeds and overall network performance.
-
C.
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.
-
D.
Special Telecommunications Service (historically associated)
The Special Telecommunications Service is a Romanian government agency responsible for securing and managing the state’s special communications and information systems, historically linked to the national intelligence service.
-
E.
HLR
HLR (Home Location Register) is a central database in mobile networks that stores and manages subscriber information, authentication data, and location details for GSM users.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
set of ITU-T recommendations
ⓘ
telecommunication standard ⓘ |
| appliesTo | H.323-based multimedia communication systems ⓘ |
| category | supplementary service signalling ⓘ |
| definedBy |
ITU-T
ⓘ
linked to:
ITU Telecommunication Standardization Sector
|
| extends | H.323 ⓘ |
| goal |
to enhance interoperability of H.323 endpoints
ⓘ
to provide ISDN-like supplementary services in H.323 networks ⓘ |
| includesServiceType |
ad-hoc conferencing
ⓘ
busy call forwarding ⓘ call barring ⓘ call completion ⓘ call completion on no reply ⓘ call completion to busy subscriber ⓘ call diversion ⓘ call forwarding ⓘ call hold ⓘ call hold and retrieve ⓘ call intrusion ⓘ call offer ⓘ call park ⓘ call pickup ⓘ call transfer ⓘ call transfer with consultation ⓘ call transfer without consultation ⓘ call waiting ⓘ do not disturb ⓘ message waiting indication ⓘ name identification ⓘ no-answer call forwarding ⓘ unconditional call forwarding ⓘ |
| organizationDomain | ITU-T Study Group 16 ⓘ |
| provides |
additional call control capabilities
ⓘ
feature capabilities for multimedia communication ⓘ supplementary services for H.323 ⓘ |
| relatedStandard |
H.225.0
ⓘ
linked to:
H.225
H.245 ⓘ H.323 ⓘ |
| scope | packet-based multimedia networks ⓘ |
| standardFamilyOf | H.450.x ⓘ |
| supports |
multimedia telephony
ⓘ
video communication ⓘ voice over IP ⓘ |
| usedIn |
IP PBX implementations
ⓘ
enterprise VoIP systems ⓘ multimedia conferencing systems ⓘ |
| usesSignallingProtocol |
H.225
ⓘ
H.245 ⓘ |
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: H.450 supplementary services Description of subject: H.450 supplementary services are a set of ITU-T recommendations that define additional call control and feature capabilities—such as call transfer, call forwarding, and call hold—for multimedia communication systems based on the H.323 standard.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.