400GBASE-CR4
E551579
400GBASE-CR4 is an IEEE Ethernet physical layer standard for 400 Gb/s data transmission over short-reach copper twinax cabling using four parallel lanes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 400GBASE-CR4 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5667206 — 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: 400GBASE-CR4 Context triple: [IEEE 802.3ck, defines, 400GBASE-CR4]
-
A.
200GBASE-KR2
200GBASE-KR2 is an Ethernet physical layer standard for 200 Gbit/s transmission over backplane copper links using two electrical lanes.
-
B.
100GBASE-KR1
100GBASE-KR1 is an Ethernet physical layer standard for 100 Gb/s data transmission over a single lane of backplane copper.
-
C.
400 Gigabit Ethernet
400 Gigabit Ethernet is a high-speed Ethernet standard designed to deliver 400 Gbit/s data rates for next-generation data centers, backbone networks, and high-performance computing environments.
-
D.
10GBASE-E
10GBASE-E is a 10 Gigabit Ethernet physical layer standard that uses long-wavelength optics to support long-distance data transmission over single-mode fiber.
-
E.
10GBASE-LX4
10GBASE-LX4 is a 10 Gigabit Ethernet physical layer standard that uses wavelength-division multiplexing over multimode or single-mode fiber to support relatively long transmission distances.
- 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: 400GBASE-CR4 Target entity description: 400GBASE-CR4 is an IEEE Ethernet physical layer standard for 400 Gb/s data transmission over short-reach copper twinax cabling using four parallel lanes.
-
A.
200GBASE-KR2
200GBASE-KR2 is an Ethernet physical layer standard for 200 Gbit/s transmission over backplane copper links using two electrical lanes.
-
B.
100GBASE-KR1
100GBASE-KR1 is an Ethernet physical layer standard for 100 Gb/s data transmission over a single lane of backplane copper.
-
C.
400 Gigabit Ethernet
400 Gigabit Ethernet is a high-speed Ethernet standard designed to deliver 400 Gbit/s data rates for next-generation data centers, backbone networks, and high-performance computing environments.
-
D.
10GBASE-E
10GBASE-E is a 10 Gigabit Ethernet physical layer standard that uses long-wavelength optics to support long-distance data transmission over single-mode fiber.
-
E.
10GBASE-LX4
10GBASE-LX4 is a 10 Gigabit Ethernet physical layer standard that uses wavelength-division multiplexing over multimode or single-mode fiber to support relatively long transmission distances.
- F. None of above. chosen
Statements (24)
| Predicate | Object |
|---|---|
| instanceOf | Ethernet physical layer standard ⓘ |
| application |
data center interconnect
ⓘ
short-reach server-to-switch links ⓘ switch-to-switch links ⓘ |
| category | 400 Gigabit Ethernet ⓘ |
| connectorType | direct attach copper (DAC) ⓘ |
| dataRate | 400 Gbit/s ⓘ |
| designedFor | short-distance copper cabling ⓘ |
| encoding | PAM4 ⓘ |
| laneCount | 4 ⓘ |
| laneType | electrical lane ⓘ |
| operatingEnvironment |
intra-data-center links
ⓘ
rack-level interconnects ⓘ |
| parallelLanes | 4 parallel lanes ⓘ |
| perLaneDataRate | 100 Gbit/s ⓘ |
| physicalLayer | PHY ⓘ |
| reach | short reach ⓘ |
| standardFamily | IEEE 802.3 NERFINISHED ⓘ |
| standardizedBy | IEEE NERFINISHED ⓘ |
| supports | full-duplex transmission ⓘ |
| topology | point-to-point link ⓘ |
| useCase | high-bandwidth Ethernet connectivity ⓘ |
| usesMedium |
copper twinax cable
ⓘ
twinaxial copper cable ⓘ |
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: 400GBASE-CR4 Description of subject: 400GBASE-CR4 is an IEEE Ethernet physical layer standard for 400 Gb/s data transmission over short-reach copper twinax cabling using four parallel lanes.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.