TETRA
E565183
TETRA is a professional mobile radio and wireless communications standard widely used by public safety, emergency services, and critical infrastructure organizations for secure, reliable digital voice and data.
All labels observed (1)
| Label | Occurrences |
|---|---|
| TETRA canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T6042248 — 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: TETRA Context triple: [Time Division Multiple Access, usedIn, TETRA]
-
A.
TETRA-1
TETRA-1 is a small experimental U.S. military satellite developed for the U.S. Space Force to test and demonstrate prototype space technologies in geosynchronous orbit.
-
B.
GSM-R
GSM-R is a digital radio communication system used across European railways to provide secure voice and data links between trains and railway control centers.
-
C.
IMT-2000 family
The IMT-2000 family is the ITU-defined global standard framework for third-generation (3G) mobile communication systems, encompassing multiple technologies such as UMTS and CDMA2000.
-
D.
GSM
GSM is the common abbreviation for Great St Mary’s Church, the historic University Church located in the center of Cambridge, England.
-
E.
GSM
GSM is a second-generation (2G) digital mobile communication standard that became the global foundation for cellular voice and basic data services.
- 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: TETRA Target entity description: TETRA is a professional mobile radio and wireless communications standard widely used by public safety, emergency services, and critical infrastructure organizations for secure, reliable digital voice and data.
-
A.
TETRA-1
TETRA-1 is a small experimental U.S. military satellite developed for the U.S. Space Force to test and demonstrate prototype space technologies in geosynchronous orbit.
-
B.
GSM-R
GSM-R is a digital radio communication system used across European railways to provide secure voice and data links between trains and railway control centers.
-
C.
IMT-2000 family
The IMT-2000 family is the ITU-defined global standard framework for third-generation (3G) mobile communication systems, encompassing multiple technologies such as UMTS and CDMA2000.
-
D.
GSM
GSM is the common abbreviation for Great St Mary’s Church, the historic University Church located in the center of Cambridge, England.
-
E.
GSM
GSM is a second-generation (2G) digital mobile communication standard that became the global foundation for cellular voice and basic data services.
- F. None of above. chosen
Statements (55)
| Predicate | Object |
|---|---|
| instanceOf |
digital trunked radio standard
ⓘ
professional mobile radio standard ⓘ wireless communications standard ⓘ |
| abbreviationOf | Terrestrial Trunked Radio NERFINISHED ⓘ |
| competesWith |
DMR
NERFINISHED
ⓘ
Project 25 NERFINISHED ⓘ TETRAPOL NERFINISHED ⓘ |
| developedBy | European Telecommunications Standards Institute NERFINISHED ⓘ |
| firstStandardizedIn | 1990s ⓘ |
| formerlyKnownAs | Trans-European Trunked Radio NERFINISHED ⓘ |
| fullName | Terrestrial Trunked Radio NERFINISHED ⓘ |
| hasFeature |
dispatcher functions
ⓘ
interoperability between vendors ⓘ network-wide roaming ⓘ voice and data integration ⓘ |
| hasVersion |
TETRA Release 1
NERFINISHED
ⓘ
TETRA Release 2 NERFINISHED ⓘ |
| operatesIn |
UHF frequency bands
ⓘ
VHF frequency bands ⓘ |
| provides |
emergency call features
ⓘ
fast call setup ⓘ priority and pre-emption mechanisms ⓘ reliable communications ⓘ secure communications ⓘ |
| regionOfOrigin | Europe NERFINISHED ⓘ |
| standardizedBy | ETSI NERFINISHED ⓘ |
| supports |
air interface encryption
ⓘ
broadcast calls ⓘ direct mode operation ⓘ encryption ⓘ end-to-end encryption ⓘ gateway mode ⓘ group calls ⓘ individual calls ⓘ packet data ⓘ repeater mode ⓘ short data service ⓘ trunked radio operation ⓘ |
| usedBy |
critical infrastructure operators
ⓘ
emergency medical services ⓘ emergency services ⓘ fire and rescue services ⓘ government agencies ⓘ military organizations ⓘ police services ⓘ public safety organizations ⓘ transportation operators ⓘ utilities companies ⓘ |
| usedFor |
digital data services
ⓘ
mission-critical communications ⓘ professional mobile radio communications ⓘ secure digital voice ⓘ |
| uses |
25 kHz channel spacing
ⓘ
TDMA access method ⓘ four-slot TDMA ⓘ |
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: TETRA Description of subject: TETRA is a professional mobile radio and wireless communications standard widely used by public safety, emergency services, and critical infrastructure organizations for secure, reliable digital voice and data.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
iDEN