ITU-T Recommendation G.992.1
E438164
ITU-T Recommendation G.992.1 is an international standard that defines the technical specifications for Asymmetric Digital Subscriber Line (ADSL) broadband transmission over traditional copper telephone lines.
All labels observed (3)
| Label | Occurrences |
|---|---|
| ADSL standards in ITU-T | 1 |
| ITU-T Recommendation G.992.1 canonical | 1 |
| ITU-T modem standards | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4402338 — 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: ITU-T Recommendation G.992.1 Context triple: [ITU-T Recommendations, hasPart, ITU-T Recommendation G.992.1]
-
A.
ITU-T G.9961
ITU-T G.9961 is an international telecommunications standard that defines the data link layer and management procedures for broadband power line communication systems.
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B.
ITU-T G.9960
ITU-T G.9960 is an international telecommunications standard that defines high-speed broadband data transmission over power lines and other existing wiring in homes and buildings.
-
C.
ITU-T G.984 series
The ITU-T G.984 series is an international telecommunications standard that specifies the architecture, requirements, and transmission protocols for Gigabit-capable Passive Optical Networks (GPON) used in broadband fiber access.
-
D.
ITU-T G.827x series
The ITU-T G.827x series is a family of international telecommunication standards that define time and phase synchronization requirements and solutions for packet-based networks, particularly for mobile and other time-sensitive services.
-
E.
ITU-T G.8275.1
ITU-T G.8275.1 is a telecommunications standard that specifies a profile for precise time and phase synchronization over packet networks, particularly for mobile and other time-sensitive 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: ITU-T Recommendation G.992.1 Target entity description: ITU-T Recommendation G.992.1 is an international standard that defines the technical specifications for Asymmetric Digital Subscriber Line (ADSL) broadband transmission over traditional copper telephone lines.
-
A.
ITU-T G.9961
ITU-T G.9961 is an international telecommunications standard that defines the data link layer and management procedures for broadband power line communication systems.
-
B.
ITU-T G.9960
ITU-T G.9960 is an international telecommunications standard that defines high-speed broadband data transmission over power lines and other existing wiring in homes and buildings.
-
C.
ITU-T G.984 series
The ITU-T G.984 series is an international telecommunications standard that specifies the architecture, requirements, and transmission protocols for Gigabit-capable Passive Optical Networks (GPON) used in broadband fiber access.
-
D.
ITU-T G.827x series
The ITU-T G.827x series is a family of international telecommunication standards that define time and phase synchronization requirements and solutions for packet-based networks, particularly for mobile and other time-sensitive services.
-
E.
ITU-T G.8275.1
ITU-T G.8275.1 is a telecommunications standard that specifies a profile for precise time and phase synchronization over packet networks, particularly for mobile and other time-sensitive services.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
ADSL standard
ⓘ
ITU-T Recommendation ⓘ telecommunications standard ⓘ |
| allocatesFrequencyBand |
separate bands for downstream data
ⓘ
separate bands for upstream data ⓘ voice band for POTS ⓘ |
| alsoKnownAs |
G.992.1
NERFINISHED
ⓘ
G.dmt NERFINISHED ⓘ full-rate ADSL NERFINISHED ⓘ |
| appliesTo | twisted-pair copper telephone lines ⓘ |
| category | broadband access standard ⓘ |
| defines | Asymmetric Digital Subscriber Line (ADSL) broadband transmission over copper loops NERFINISHED ⓘ |
| definesFrequencyBand | 0 to approximately 1.1 MHz on the copper pair ⓘ |
| definesInterfaceBetween | ATU-C (ADSL Transceiver Unit – Central office) and ATU-R (ADSL Transceiver Unit – Remote) NERFINISHED ⓘ |
| focusesOn | asymmetric digital subscriber line access NERFINISHED ⓘ |
| governs |
compatibility with existing voice services
ⓘ
electrical characteristics of ADSL signals ⓘ performance requirements for ADSL transceivers ⓘ |
| includesFeature |
bit loading per subcarrier
ⓘ
dynamic rate adaptation ⓘ forward error correction ⓘ interleaving for impulse noise protection ⓘ power management states ⓘ startup and training procedures ⓘ trellis coding ⓘ |
| issuedBy |
ITU-T
NERFINISHED
ⓘ
International Telecommunication Union NERFINISHED ⓘ |
| language | English (authoritative text) ⓘ |
| maintainedBy | ITU-T Study Group 15 NERFINISHED ⓘ |
| partOfSeries | ITU-T G.992-series ADSL Recommendations NERFINISHED ⓘ |
| publicationDomain | fixed access networks ⓘ |
| relatedTo |
ITU-T Recommendation G.992.2
NERFINISHED
ⓘ
ITU-T Recommendation G.992.3 NERFINISHED ⓘ ITU-T Recommendation G.992.5 NERFINISHED ⓘ |
| sector | ITU Telecommunication Standardization Sector NERFINISHED ⓘ |
| standardizes |
error correction for ADSL
ⓘ
framing for ADSL ⓘ line coding for ADSL ⓘ modulation methods for ADSL ⓘ physical layer for ADSL ⓘ rate adaptation for ADSL ⓘ |
| supports | asymmetric downstream and upstream bit rates ⓘ |
| supportsDownstreamRateUpTo | 8 Mbit/s ⓘ |
| supportsOperationOver |
ISDN-based loops (with restrictions)
ⓘ
POTS (Plain Old Telephone Service) lines ⓘ |
| supportsUpstreamRateUpTo | 1 Mbit/s ⓘ |
| usedFor |
residential broadband Internet access
ⓘ
small business broadband Internet access ⓘ |
| usesAbbreviation | DMT ⓘ |
| usesModulation | discrete multitone modulation ⓘ |
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: ITU-T Recommendation G.992.1 Description of subject: ITU-T Recommendation G.992.1 is an international standard that defines the technical specifications for Asymmetric Digital Subscriber Line (ADSL) broadband transmission over traditional copper telephone lines.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
ITU-T modem standards
this entity surface form:
ADSL standards in ITU-T