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.
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 standards
→
|
| includesFeature |
inrush current limiting
→
overload protection → power classification → short-circuit protection → signature detection → |
| introducedInStandard |
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
→
IEEE 802.3at → 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
→
|
Referenced by (3)
| Subject (surface form when different) | Predicate |
|---|---|
|
IEEE 802.3bt
→
|
area |
|
IEEE 802.3
→
|
defines |
|
IEEE 802.3 Working Group
→
|
responsibleFor |