ISDN
E409006
ISDN (Integrated Services Digital Network) is a set of communication standards for digital transmission of voice, video, and data over traditional telephone networks.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Integrated Services Digital Network | 4 |
| ISDN canonical | 3 |
| ISDN User Part | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4031812 — 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: ISDN Context triple: [5ESS switch, supportsService, ISDN]
-
A.
POTS (Plain Old Telephone Service)
POTS (Plain Old Telephone Service) is the traditional analog voice telephone service that formed the basis of the public switched telephone network for most of the 20th century.
-
B.
X.25
X.25 is an early ITU-T packet-switched network protocol standard widely used for WAN communication before the rise of modern IP-based networks.
-
C.
V.92
V.92 is an ITU-T modem standard that defines enhanced dial-up Internet connection features such as faster upload speeds, quicker call setup, and modem-on-hold capabilities.
-
D.
V.90
V.90 is an ITU-T modem standard that enabled dial-up internet connections at speeds up to 56 kbit/s over traditional telephone lines.
-
E.
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.
- 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: ISDN Target entity description: ISDN (Integrated Services Digital Network) is a set of communication standards for digital transmission of voice, video, and data over traditional telephone networks.
-
A.
POTS (Plain Old Telephone Service)
POTS (Plain Old Telephone Service) is the traditional analog voice telephone service that formed the basis of the public switched telephone network for most of the 20th century.
-
B.
X.25
X.25 is an early ITU-T packet-switched network protocol standard widely used for WAN communication before the rise of modern IP-based networks.
-
C.
V.92
V.92 is an ITU-T modem standard that defines enhanced dial-up Internet connection features such as faster upload speeds, quicker call setup, and modem-on-hold capabilities.
-
D.
V.90
V.90 is an ITU-T modem standard that enabled dial-up internet connections at speeds up to 56 kbit/s over traditional telephone lines.
-
E.
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.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
ITU-T recommendation family
ⓘ
digital communication standard ⓘ telecommunications standard ⓘ |
| abbreviationOf |
ISDN
self-linksurface differs
ⓘ
surface form:
Integrated Services Digital Network
|
| abbreviationOfAccessType |
BRI
ⓘ
PRI ⓘ |
| BChannelBitRate | 64 kbit/s ⓘ |
| BRIConfiguration | 2B+D ⓘ |
| BRITotalBitRate | 144 kbit/s ⓘ |
| commercialDeploymentBegan | 1980s ⓘ |
| DChannelBitRate |
16 kbit/s
ⓘ
64 kbit/s ⓘ |
| declineReason | replacement by cheaper broadband technologies ⓘ |
| developedBy |
ITU Telecommunication Standardization Sector
ⓘ
surface form:
ITU-T
International Telecommunication Union ⓘ |
| fullName |
ISDN
self-linksurface differs
ⓘ
surface form:
Integrated Services Digital Network
|
| hasAccessType |
Basic Rate Interface
ⓘ
Primary Rate Interface ⓘ |
| hasChannelType |
B-channel
ⓘ
D-channel ⓘ |
| introducedInDecade | 1980s ⓘ |
| keyFeature |
end-to-end digital connectivity
ⓘ
integrated services over a single digital line ⓘ out-of-band signaling via D-channel ⓘ |
| predecessor |
POTS
ⓘ
analog telephone network ⓘ |
| PRIConfiguration |
23B+D in North America and Japan
ⓘ
30B+D in Europe and most of the world ⓘ |
| PRITotalBitRate |
1.544 Mbit/s in T1 systems
ⓘ
2.048 Mbit/s in E1 systems ⓘ |
| purpose |
digital transmission of data over telephone networks
ⓘ
digital transmission of video over telephone networks ⓘ digital transmission of voice over telephone networks ⓘ |
| regionallyCommonInPast |
Europe
ⓘ
Japan ⓘ North America ⓘ |
| standardizedBy |
ITU Telecommunication Standardization Sector
ⓘ
surface form:
ITU-T
|
| successor |
DSL
ⓘ
broadband IP networks ⓘ |
| supportsService |
data
ⓘ
fax ⓘ packet-switched data via X.25 ⓘ video ⓘ voice ⓘ |
| transmissionType | circuit-switched ⓘ |
| usedFor |
PBX trunking
ⓘ
backup links for data circuits ⓘ internet access ⓘ remote access to corporate networks ⓘ video conferencing ⓘ |
| usesSignalingProtocol |
D-channel signaling
ⓘ
Q.931 ⓘ |
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: ISDN Description of subject: ISDN (Integrated Services Digital Network) is a set of communication standards for digital transmission of voice, video, and data over traditional telephone networks.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Integrated Services Digital Network
this entity surface form:
Integrated Services Digital Network
this entity surface form:
Integrated Services Digital Network
this entity surface form:
Integrated Services Digital Network
this entity surface form:
ISDN User Part