Power over Ethernet
E16214
Power over Ethernet is a networking technology that delivers electrical power and data over the same Ethernet cable to devices such as IP phones, wireless access points, and security cameras.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Power over Ethernet canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T139611 — 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: Power over Ethernet Context triple: [IEEE 802.3, defines, Power over Ethernet]
-
A.
IEEE 802.3af Power over Ethernet standard
The IEEE 802.3af Power over Ethernet standard defines a method for delivering electrical power along with data over standard Ethernet cabling to devices such as IP phones, wireless access points, and network cameras.
-
B.
IEEE 802.3bt 4‑pair Power over Ethernet standard
The IEEE 802.3bt 4‑pair Power over Ethernet standard is a networking specification that enables higher power delivery over all four twisted pairs of Ethernet cabling to support more demanding devices such as pan-tilt-zoom cameras, wireless access points, and building automation systems.
-
C.
IEEE 802.3at
IEEE 802.3at is a Power over Ethernet (PoE+) standard that increases the power available to networked devices beyond the original PoE specification, enabling support for more demanding equipment such as PTZ cameras and wireless access points.
-
D.
RJ45
RJ45 is a standardized 8-pin modular connector commonly used for terminating Ethernet network cables in computer and telecommunications networking.
-
E.
IEEE 802.3bz 2.5G/5GBASE‑T Ethernet standard
IEEE 802.3bz 2.5G/5GBASE‑T Ethernet standard defines multi‑gigabit Ethernet operation over existing twisted‑pair copper cabling, enabling 2.5 and 5 Gbit/s network speeds for applications like upgraded Wi‑Fi access points and enterprise networks.
- 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: Power over Ethernet Target entity description: Power over Ethernet is a networking technology that delivers electrical power and data over the same Ethernet cable to devices such as IP phones, wireless access points, and security cameras.
-
A.
IEEE 802.3af Power over Ethernet standard
The IEEE 802.3af Power over Ethernet standard defines a method for delivering electrical power along with data over standard Ethernet cabling to devices such as IP phones, wireless access points, and network cameras.
-
B.
IEEE 802.3bt 4‑pair Power over Ethernet standard
The IEEE 802.3bt 4‑pair Power over Ethernet standard is a networking specification that enables higher power delivery over all four twisted pairs of Ethernet cabling to support more demanding devices such as pan-tilt-zoom cameras, wireless access points, and building automation systems.
-
C.
IEEE 802.3at
IEEE 802.3at is a Power over Ethernet (PoE+) standard that increases the power available to networked devices beyond the original PoE specification, enabling support for more demanding equipment such as PTZ cameras and wireless access points.
-
D.
RJ45
RJ45 is a standardized 8-pin modular connector commonly used for terminating Ethernet network cables in computer and telecommunications networking.
-
E.
IEEE 802.3bz 2.5G/5GBASE‑T Ethernet standard
IEEE 802.3bz 2.5G/5GBASE‑T Ethernet standard defines multi‑gigabit Ethernet operation over existing twisted‑pair copper cabling, enabling 2.5 and 5 Gbit/s network speeds for applications like upgraded Wi‑Fi access points and enterprise networks.
- F. None of above. chosen
Statements (60)
| Predicate | Object |
|---|---|
| instanceOf |
networking technology
ⓘ
power delivery standard ⓘ |
| abbreviation |
PD
ⓘ
PSE ⓘ PoE ⓘ |
| backwardCompatibleWith | non-PoE Ethernet devices via detection mechanism ⓘ |
| benefit |
eliminates need for separate power supplies at device location
ⓘ
enables centralized power management ⓘ simplifies installation of network devices ⓘ supports uninterruptible power via central UPS ⓘ |
| compatibleWith | Category 5 cable or higher ⓘ |
| definedBy |
IEEE 802.3 Ethernet standard
ⓘ
surface form:
IEEE 802.3 standards
|
| includesFeature |
inrush current limiting
ⓘ
overload protection ⓘ power classification ⓘ short-circuit protection ⓘ signature detection ⓘ |
| introducedInStandard |
IEEE 802.3af Power over Ethernet standard
ⓘ
surface form:
IEEE 802.3af-2003
|
| limitation | power loss over long cable runs ⓘ |
| maximumCableLength | 100 meters for standard Ethernet ⓘ |
| powers | Powered Device ⓘ |
| relatedConcept |
endspan PoE switch
ⓘ
midspan injector ⓘ passive PoE ⓘ |
| requires | Power Sourcing Equipment ⓘ |
| requiresDetectionOf | powered device signature before applying full power ⓘ |
| standardIncludes |
IEEE 802.3af Power over Ethernet standard
ⓘ
surface form:
IEEE 802.3af
IEEE 802.3at ⓘ IEEE 802.3bt 4‑pair Power over Ethernet standard ⓘ
surface form:
IEEE 802.3bt
IEEE 802.3bu ⓘ |
| supportsDeviceType |
IP phone
ⓘ
LED lighting fixture ⓘ VoIP phone ⓘ building access control device ⓘ industrial sensor ⓘ network security camera ⓘ network switch ⓘ small network appliance ⓘ thin client ⓘ wireless access point ⓘ |
| supportsMaximumPowerPerPort |
15.4 W for IEEE 802.3af
ⓘ
30 W for IEEE 802.3at ⓘ up to 60 W for IEEE 802.3bt Type 3 ⓘ up to 90–100 W for IEEE 802.3bt Type 4 ⓘ |
| supportsMode |
4-pair powering in 802.3bt
ⓘ
Mode A power over data pairs ⓘ Mode B power over spare pairs ⓘ |
| transports |
data
ⓘ
electrical power ⓘ |
| transportsPowerAndDataOver | single Ethernet cable ⓘ |
| typicalNominalVoltage | 48 V DC ⓘ |
| usedIn |
IP surveillance systems
ⓘ
campus networks ⓘ enterprise networks ⓘ industrial automation networks ⓘ smart building infrastructure ⓘ |
| usesMedium | Ethernet cable ⓘ |
| usesPowerPairs |
data pairs in 10/100/1000BASE-T
ⓘ
spare pairs in 10/100BASE-T ⓘ |
| usesVoltageRange | approximately 44–57 V DC ⓘ |
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: Power over Ethernet Description of subject: Power over Ethernet is a networking technology that delivers electrical power and data over the same Ethernet cable to devices such as IP phones, wireless access points, and security cameras.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
IEEE 802.3
subject surface form:
IEEE 802.3bt