Ethernet equipment slave clock (EEC)
E209902
The Ethernet equipment slave clock (EEC) is a network timing device used in packet-based transport systems to provide highly accurate and stable frequency synchronization for Ethernet equipment.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ethernet equipment slave clock (EEC) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1892520 — 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: Ethernet equipment slave clock (EEC) Context triple: [ITU-T G.8262, defines, Ethernet equipment slave clock (EEC)]
-
A.
IEEE 1588 Precision Time Protocol standard
The IEEE 1588 Precision Time Protocol standard defines a method for highly accurate time synchronization over packet-based networks, widely used in industrial automation, telecommunications, and power systems.
-
B.
Time-Triggered Ethernet
Time-Triggered Ethernet is a real-time communication protocol for Ethernet networks that uses time-division scheduling to guarantee deterministic, low-latency message delivery in safety-critical and embedded systems.
-
C.
IEEE 802.1AS timing and synchronization standard
The IEEE 802.1AS timing and synchronization standard defines precise time synchronization mechanisms for time-sensitive networking over Ethernet, enabling coordinated, low-latency communication in applications such as industrial automation and audio/video transport.
-
D.
EET
EET is a time zone used in parts of Eastern Europe and the Eastern Mediterranean, typically two hours ahead of Coordinated Universal Time (UTC+2).
-
E.
DCLK
DCLK was the NASDAQ ticker symbol for DoubleClick, a pioneering online advertising technology company later acquired by Google.
- 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: Ethernet equipment slave clock (EEC) Target entity description: The Ethernet equipment slave clock (EEC) is a network timing device used in packet-based transport systems to provide highly accurate and stable frequency synchronization for Ethernet equipment.
-
A.
IEEE 1588 Precision Time Protocol standard
The IEEE 1588 Precision Time Protocol standard defines a method for highly accurate time synchronization over packet-based networks, widely used in industrial automation, telecommunications, and power systems.
-
B.
Time-Triggered Ethernet
Time-Triggered Ethernet is a real-time communication protocol for Ethernet networks that uses time-division scheduling to guarantee deterministic, low-latency message delivery in safety-critical and embedded systems.
-
C.
IEEE 802.1AS timing and synchronization standard
The IEEE 802.1AS timing and synchronization standard defines precise time synchronization mechanisms for time-sensitive networking over Ethernet, enabling coordinated, low-latency communication in applications such as industrial automation and audio/video transport.
-
D.
EET
EET is a time zone used in parts of Eastern Europe and the Eastern Mediterranean, typically two hours ahead of Coordinated Universal Time (UTC+2).
-
E.
DCLK
DCLK was the NASDAQ ticker symbol for DoubleClick, a pioneering online advertising technology company later acquired by Google.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
frequency synchronization equipment
ⓘ
network timing device ⓘ |
| abbreviation | EEC ⓘ |
| domain |
carrier-grade Ethernet
ⓘ
network synchronization engineering ⓘ telecommunications networking ⓘ |
| goal |
ensure frequency alignment between network elements
ⓘ
meet telecom-grade synchronization requirements ⓘ support time-division multiplexing like services over packet ⓘ |
| hasFunction |
distribute recovered clock to internal Ethernet circuitry
ⓘ
filter timing impairments such as jitter and wander ⓘ maintain holdover performance during reference loss ⓘ recover network timing from line signal ⓘ |
| hasProperty |
high stability frequency output
ⓘ
hitless reference switching capability ⓘ holdover mode operation ⓘ low jitter clock output ⓘ low wander clock output ⓘ phase-locked loop based timing recovery ⓘ stratum-level frequency accuracy (implementation dependent) ⓘ support for multiple reference inputs ⓘ |
| outputsTo |
Ethernet physical layer devices
ⓘ
other timing clients within network element ⓘ system backplane timing distribution network ⓘ |
| partOf |
carrier Ethernet switches and routers
ⓘ
mobile backhaul transport equipment ⓘ packet transport network node ⓘ synchronous Ethernet equipment ⓘ |
| provides |
frequency reference for Ethernet equipment
ⓘ
highly accurate frequency synchronization ⓘ stable frequency synchronization ⓘ synchronous Ethernet timing ⓘ |
| receivesTimingFrom |
Ethernet line signal
ⓘ
external synchronization supply unit ⓘ primary reference clock (PRC) via network ⓘ |
| relatedTo |
Ethernet equipment master clock
ⓘ
packet-based synchronization ⓘ primary reference time clock (PRTC) ⓘ synchronization supply unit (SSU) ⓘ synchronous Ethernet ⓘ |
| supportsStandard |
ITU-T G.781 (timing characteristics reference)
ⓘ
ITU-T G.8262 ⓘ ITU-T G.8262 ⓘ
surface form:
ITU-T G.8262.1
ITU-T G.8264 ⓘ |
| usedFor |
frequency synchronization in carrier Ethernet
ⓘ
frequency synchronization in mobile backhaul ⓘ frequency synchronization in packet transport networks ⓘ |
| usedIn |
Ethernet
ⓘ
surface form:
Ethernet networks
packet-based transport systems ⓘ |
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: Ethernet equipment slave clock (EEC) Description of subject: The Ethernet equipment slave clock (EEC) is a network timing device used in packet-based transport systems to provide highly accurate and stable frequency synchronization for Ethernet equipment.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.