405:
60:
374:
2381:
2288:
2561:
2390:
2279:
2471:
417:
4154:
2510:
2339:
390:
4166:
2600:
2519:
2330:
633:
2432:
2177:) – with DC positive on pins 4 and 5 and DC negative on 7 and 8 and data on 1β2 and 3β6, but polarization may vary. Gigabit passive injectors use a transformer on the data pins to allow power and data to share the cable and are typically compatible with 802.3af Mode A. Passive midspan injectors with up to 12 ports are available.
2223:
The second scenario largely depends on the environment and installation, whereas the first is solely influenced by the cable construction. In a standard unshielded cable, the PoE-related temperature rise increases by a factor of 5. In a shielded cable, this value drops to between 2.5 and 3, depending
2195:
Passive DC-to-DC injectors also exist which convert a 9 V to 36 V DC, or 36 V to 72 V DC power source to a stabilized 24 V 1 A, 48 V 0.5 A, or up to 48 V 2.0 A PoE feed with '+' on pins 4 & 5 and '−' on pins 7 & 8. These DC-to-DC PoE injectors are used in
1115:
wiring) form one side of the 48 V DC, and pins 3 and 6 (pair #3 in T568B) form the other side. These are the same two pairs used for data transmission in 10BASE-T and 100BASE-TX, allowing the provision of both power and data over only two pairs in such networks. The free polarity allows PoE to
338:
intended for automotive and industrial applications. On the two-pair or four-pair standards, the same power voltage is applied to each conductor of the pair, so that within each pair there is no differential voltage other than that representing the transmitted data. With single-pair
Ethernet, power
1131:
The PSE, not the PD, decides whether power mode A or B shall be used. PDs that implement only mode A or mode B are disallowed by the standard. The PSE can implement mode A or B or both. A PD indicates that it is standards-compliant by placing a 25 kΞ© resistor between the powered pairs. If the
1143:
There are two types of PSEs: endspans and midspans. Endspans (commonly called PoE switches) are
Ethernet switches that include the power over Ethernet transmission circuitry. Midspans are power injectors that stand between a regular Ethernet switch and the powered device, injecting power without
623:
Many powered devices have an auxiliary power connector for an optional external power supply. Depending on the design, some, none, or all of the device's power can be supplied from the auxiliary port, with the auxiliary port also sometimes acting as backup power in case PoE-supplied power fails.
651:, point out that quoted losses are for worst case scenarios in terms of cable quality, length and power consumption by powered devices. In any case, where the central PoE supply replaces several dedicated AC circuits, transformers and inverters, the power loss in cabling can be justifiable.
2180:
Devices needing 5 volts cannot typically use PoE at 5 V on
Ethernet cable beyond short distances (about 15 feet (4.6 m)) as the voltage drop of the cable becomes too significant, so a 24 V or 48 V to 5 V DC-DC converter is required at the remote end.
2143:
in 2007, which was then acquired by
Microchip in 2018, has been selling midspan power injectors since 1999. Using Microchip's multi-PoE PSE ICs, PoE injectors and switches can support the IEEE 802.3 PoE standards and also pre-standard configurations. Several companies such as
1107:
or 10BASE-T. Mode B delivers power on the spare pairs. 4-pair delivers power on all four pairs. PoE can also be used on 1000BASE-T, 2.5GBASE-T, 5GBASE-T and 10GBASE-T Ethernet, in which case there are no spare pairs and all power is delivered using the phantom technique.
289:. The standard introduces two additional power types: up to 51 W delivered power (Type 3) and up to 71.3 W delivered power (Type 4), optionally by using all four pairs for power. Each pair of twisted pairs needs to handle a current of up to 600
2073:
supported a proprietary form of PoE many years before there was an IEEE standard for delivering PoE. Cisco's original PoE implementation is not software upgradeable to the IEEE 802.3af standard. Cisco's original PoE equipment is capable of delivering up to
2172:
In a passive PoE system, the injector does not communicate with the powered device to negotiate its voltage or wattage requirements, but merely supplies power at all times. Common 100 Mbit/s passive applications use the pinout of 802.3af mode B (see
1518:
Class 4 can only be used by IEEE 802.3at (Type 2) devices, requiring valid Class 2 and Mark 2 currents for the power up stages. An 802.3af device presenting a class 4 current is considered non-compliant and, instead, will be treated as a Class 0 device.
1139:
To retain power, the PD must use at least 5β10 mA for at least 60 ms at a time. If the PD goes more than 400 ms without meeting this requirement, the PSE will consider the device disconnected and, for safety reasons, remove power.
647:, which cannot be easily centrally managed. Critics of this approach argue that PoE is inherently less efficient than AC power due to the lower voltage, and this is made worse by the thin conductors of Ethernet. Advocates of PoE, like the
404:
230:(PD). This signaling allows the presence of a conformant device to be detected by the power source, and allows the device and source to negotiate the amount of power required or available while avoiding damage to non-compatible devices.
63:
In this configuration, an
Ethernet connection includes Power over Ethernet (PoE) (gray cable looping below), and a PoE splitter provides a separate data cable (gray, looping above) and power cable (black, also looping above) for a
1148: Mbit/s to 1 Gbit/s), which makes it convenient to add the PoE capability. Midspans are used when there is no desire to replace and configure a new Ethernet switch, and only PoE needs to be added to the network.
757:; the powered device must operate with either pair: spare pairs 4β5 and 7β8 or data pairs 1β2 and 3β6. Polarity is defined by the standards on spare pairs, and ambiguously implemented for data pairs, with the use of a
1127:
and T568B) form one side of the DC supply and pins 7β8 (pair #4 in both T568A and T568B) provide the return; these are the "spare" pairs in 10BASE-T and 100BASE-TX. Mode B, therefore, requires a 4-pair cable.
270:, provides up to 25.5 W of power for Type 2 devices. The 2009 standard prohibits a powered device from using all four pairs for power. Both of these standards have since been incorporated into the
3608:
2952:
120:
68:(WAP). The splitter is the silver and black box in the middle between the wiring junction box (left) and the access point (right). The PoE connection eliminates the need for a nearby
3079:
173:
technique commonly used for powering condenser microphones. Power is transmitted on the data conductors by applying a common voltage to each pair. Because twisted-pair
Ethernet uses
3940:
2866:
3006:
1092:
More stringent cable specification allows assumption of more current carrying capacity and lower resistance (20.0 Ξ© for
Category 3 versus 12.5 Ξ© for Category 5).
671:
outlined in a May 2011 white paper) claim to achieve a savings upwards of 3 W per link. This saving is especially significant as higher power devices come online.
2105:
to the auto-negotiation mode switch port. A later CDP message with a TLV tells the PSE its final power requirement. A discontinuation of link pulses shuts down power.
3586:
2078:
per port. The amount of power to be delivered is negotiated between the endpoint and the Cisco switch based on a power value that was added to the Cisco proprietary
3109:
2128:
A proprietary high-power development called LTPoE++, using a single Cat 5e
Ethernet cable, is capable of supplying varying levels at 38.7, 52.7, 70, and 90 W.
3050:
2212:
EN 50174-99-1 draft standards outline the cable bundle temperature rise that can be expected from the use of 4PPoE. A distinction is made between two scenarios:
1132:
PSE detects a resistance that is too high or too low (including a short circuit), no power is applied. This protects devices that do not support PoE. An optional
3474:
2981:
3630:
3535:
1530:(LLDP) is a layer-2 Ethernet protocol for managing devices. LLDP allows an exchange of information between a PSE and a PD. This information is formatted in
2192:
and others. Earlier versions of passive PoE 24 VDC power sources shipped with 802.11a, 802.11g and 802.11n based radios are commonly 100 Mbit/s only.
193:
and faster, both alternatives A and B transmit power on wire pairs also used for data since all four pairs are used for data transmission at these speeds.
72:. In another common configuration, the access point or other connected device includes internal PoE splitting and the external splitter is not necessary.
3612:
2184:
Passive PoE power sources are commonly used with a variety of indoor and outdoor wireless radio equipment, most commonly from
Motorola (now Cambium),
499:
Outdoor roof mounted radios with integrated antennas, 4G/LTE, 802.11 or 802.16 based wireless CPEs (customer premises equipment) used by wireless ISPs
679:
Standards-based Power over
Ethernet is implemented following the specifications in IEEE 802.3af-2003 (which was later incorporated as clause 33 into
2813:
1899:
1144:
affecting the data. Endspans are normally used on new installations or when the switch has to be replaced for other reasons (such as moving from
1111:
Mode A has two alternate configurations (MDI and MDI-X), using the same pairs but with different polarities. In mode A, pins 1 and 2 (pair #2 in
2939:
4134:
3312:
373:
3154:
3071:
2862:
3706:
IEEE 802.3bt-2018, clause 145.2.9 stating "A PSE shall not apply 4-pair power unless the PSE has identified the PD as Type 3 or Type 4."
3651:
2784:
Clause 33.3.1 stating, "A PD may indicate the ability to accept power on both pairsets from a Clause 145 PSE using TLV variable PD 4PID."
2757:
Clause 33.3.1 stating, "PDs that simultaneously require power from both Mode A and Mode B are specifically not allowed by this standard."
255:
and 350 mA) on each port. Only 12.95 W is assured to be available at the powered device as some power dissipates in the cable.
4129:
2807:"IEEE P802.3bt/D1.5 Draft Standard for Ethernet β Amendment: Physical Layer and Management Parameters for DTE Power via MDI over 4-Pair"
503:
3761:
1902:
1762:
1576:
741:
which use all four pairs for data transmission. This is possible because all versions of Ethernet over twisted pair cable specify
2082:(CDP). CDP is also responsible for dynamically communicating the Voice VLAN value from the Cisco switch to the Cisco VoIP Phone.
753:
as one side of the DC supply, so two pairs are required to complete the circuit. The polarity of the DC supply may be inverted by
3002:
477:
cable. PoE power is fed into the PD (or PoE in) port. These switches may in turn power remote PoE devices using PoE pass through.
99:
cabling. This allows a single cable to provide both a data connection and enough electricity to power networked devices such as
3980:
3582:
301:
is included. This development opens the door to new applications and expands the use of applications such as high-performance
169:
Alternative A transmits power on the same wires as data for 10 and 100 Mbit/s Ethernet variants. This is similar to the
119:
There are several common techniques for transmitting power over Ethernet cabling. Three of them have been standardized by the
3362:
2908:
643:
Advocates of PoE expect PoE to become a global long term DC power cabling standard and replace a multiplicity of individual
3557:
448:
200:
3513:
3100:
1867:
1856:
1527:
572:
59:
3178:
410:
A CableFree FOR3 microwave link installed in the UAE: a full outdoor radio featuring proprietary high power over Ethernet
339:
is transmitted in parallel to the data. PoDL initially defined ten power classes, ranging from 0.5 to 50 W (at PD).
4197:
1080:
749:; the DC supply and load connections can be made to the transformer center-taps at each end. Each pair thus operates in
3042:
416:
4202:
4124:
4074:
4069:
3467:
3689:
2977:
2841:
1531:
4119:
3917:
3907:
2771:
1874:
550:
PoE splitters that output the power, often at a different voltage (e.g. 5V), to power a remote device or charge a
4109:
4031:
3626:
3531:
2093:. The PSE gets the FLP in return. The PSE will provide a common mode current between pairs 1 and 2, resulting in
663:(EEE) standard potentially produces additional energy savings. Pre-standard integrations of EEE and PoE (such as
660:
513:
1534:(TLV) format. PoE standards define TLV structures used by PSEs and PDs to signal and negotiate available power.
2079:
754:
664:
1136:
feature allows the PD to indicate its power requirements by changing the sense resistance at higher voltages.
389:
3719:
2733:
2720:
802.3at Amendment 3: Data Terminal Equipment (DTE) Power via the Media Dependent Interface (MDI) Enhancements
199:
provides power using all four pairs of a twisted-pair cable. This enables higher power for applications like
4217:
4212:
4207:
4093:
3840:
3804:
734:
525:
347:
294:
3671:
354:
and as of 2021 includes a total of 15 power classes with additional intermediate voltage and power levels.
159:, which separates the data and the power conductors for 10BASE-T/100BASE-TX, making troubleshooting easier.
3975:
3754:
2737:
1983:
742:
174:
2806:
3855:
609:
494:
484:
453:
302:
100:
96:
65:
4170:
4051:
4026:
3819:
3739:
721:
technique is used to allow the powered pairs to also carry data. This permits its use not only with
529:
395:
31:
3583:"Understanding the Cisco IP Phone 10/100 Ethernet In-Line Power Detection Algorithm - Cisco Systems"
714:
power supply, an additional PoE power source that can be used in combination with a non-PoE switch.
4036:
4016:
4011:
3995:
3902:
3814:
3809:
3324:
351:
45:
3912:
3774:
2089:(FLP) on the transmit pair. The PD (device) connects the transmit line to the receive line via a
750:
695:
464:
84:
3147:
588:), or an intermediary device between a non-PoE-capable switch and a PoE device, an external PoE
2061:
There are more than ten proprietary implementations. The more common ones are discussed below.
4192:
4158:
3886:
3747:
3657:
3187:
2185:
648:
507:
186:
178:
4021:
3824:
3799:
3789:
3436:
2947:
967:
957:
746:
688:
684:
343:
190:
4088:
3845:
3010:
2734:"Amendment to IEEE 802.3 Standard Enhances Power Management and Increases Available Power"
2380:
2287:
2090:
2086:
707:
680:
271:
3363:"LTC4278 IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support"
2644:
Only supported by 802.3bt for devices that identify as the newly added Type 3 or Type 4.
2560:
2389:
2278:
1103:
Three modes, A, B, and 4-pair are available. Mode A delivers power on the data pairs of
4083:
4041:
3860:
3499:
2470:
706:
cables and comes from a power supply within a PoE-enabled networking device such as an
636:
577:
519:
470:
248:
204:
92:
2233:
802.3af/at/bt standards A and B from the power sourcing equipment perspective (MDI-X)
4186:
3794:
3609:"Cisco Universal Power Over Ethernet - Unleash the Power of your Network White Paper"
1083:
within the powered device will lose another 10 to 25% of the available power to heat.
718:
541:
170:
138:
758:
699:
551:
69:
3373:
2916:
473:
installed in distant rooms, to support a small cluster of Ethernet ports from one
3564:
165:, which uses all four twisted pairs in parallel, increasing the achievable power.
4061:
3865:
3440:
537:
Stage and Theatrical devices, such as networked audio breakout and routing boxes
335:
281:
standard further expands the power capabilities of 802.3at. It is also known as
3517:
4114:
3881:
2136:
2070:
1117:
1104:
730:
726:
644:
613:
423:
331:
182:
146:
124:
108:
522:
components including help-points, intercoms, entry cards, keyless entry, etc.
3990:
3985:
3960:
3955:
3950:
3850:
2140:
738:
617:
444:
380:
298:
104:
53:
2120:). UPOE can use all 4 pairs, after negotiation, to supply up to 60 W.
2012:
PSE (provider) tests PD (consumer) physically using 802.3af phase class 3.
608:(PD) is any device powered by PoE, thus consuming energy. Examples include
2101:
default of allocated power. The PD must then provide Ethernet link within
3922:
3770:
3693:
2837:
2189:
722:
703:
532:
480:
142:
49:
2509:
2338:
1236:
PSE outputs classification voltage again to indicate 802.3at capability
1023:
10 Β°C (20 Β°F) with more than half of bundled cables pairs at I
632:
37:"PoE++" and "4PPoE" redirect here. For the point-to-point protocol, see
3970:
3965:
3945:
2599:
2518:
2329:
2209:
2205:
2145:
17:
3532:"Planning for Cisco IP Telephony > Network Infrastructure Analysis"
3072:"Clarifying misperceptions about Power over Ethernet and cable losses"
2431:
2108:
In 2014, Cisco created another non-standard PoE implementation called
293:(Type 3) or 960 mA (Type 4). Additionally, support for
4079:
3336:
3334:
2219:
bundles heating up from the outside to match the ambient temperature.
2157:
2153:
1145:
474:
290:
88:
729:, which use only two of the four pairs in the cable, but also with
3720:
IEEE GET Program for free download of standards after registration
2020:
PD sends to PSE: I'm a PD, max power = X, max power requested = X.
1124:
1112:
631:
490:
150:
38:
27:
System for delivering power along with data over an Ethernet cable
2940:"The Bright New Outlook For LEDs: New Drivers, New Possibilities"
4139:
3675:
2149:
2085:
Under Cisco's pre-standard scheme, the PSE (switch) will send a
1538:
458:
438:
3743:
3734:
3729:
3724:
2863:"Automotive power-over-Ethernet standard extends wattage range"
210:
In addition to standardizing existing practice for spare-pair (
3558:"Power over Ethernet on the Cisco Catalyst 6500 Series Switch"
2838:"IEEE P802.3bu 1-Pair Power over Data Lines (PoDL) Task Force"
2042:
PSE may deny any PD drawing more power than max allowed by PSE
1179:
PSE detects if the PD has the correct signature resistance of
2036:
PD shall never request more power than physical 802.3af class
3462:
3460:
1313:
222:), the IEEE PoE standards provide for signaling between the
2026:
PD may now use the amount of power as specified by the PSE.
1700:
b0-1 power priority: 11=low;10=high;01=critical;00=unknown
1029:
10 Β°C (20 Β°F) with temperature planning required
3102:
Power over Ethernet (PoE): An Energy-Efficient Alternative
1005:
Eight power class levels (1β8) negotiated by signature or
683:) or the 2009 update, IEEE 802.3at. The standards require
2045:
PSE shall not reduce power allocated to PD that is in use
2039:
PD shall never draw more than max power advertised by PSE
991:
Four power class levels (1β4) negotiated by signature or
342:
Subsequently, PoDL was added to the single-pair variants
3690:"Passive Power over Ethernet equipment, AC-DC and DC-DC"
1014:
Derating of maximum cable ambient operating temperature
998:
Six power class levels (1β6) negotiated by signature or
181:. The common-mode voltage is easily extracted using the
121:
Institute of Electrical and Electronics Engineers (IEEE)
3348:
3346:
1020:
5 Β°C (9 Β°F) with one mode (two pairs) active
988:
Three power class levels (1β3) negotiated by signature
3146:
Koussalya Balasubramanian; David Abramson (May 2014).
3070:
David Tremblay; Lennart Yseboodt (November 10, 2017),
2216:
bundles heating up from the inside to the outside, and
516:
components including sensors, controllers, meters etc.
1308:
IEEE 802.3at capable devices are also referred to as
3468:"LLDP / LLDP-MED Proposal for PoE Plus (2006-09-15)"
3313:"Banish Those "Wall Warts" With Power Over Ethernet"
3043:"Banish Those "Wall Warts" With Power Over Ethernet"
576:) power on the Ethernet cable. This device may be a
4102:
4060:
4004:
3933:
3895:
3874:
3833:
3782:
2023:PSE sends to PD: I'm a PSE, max power allowed = X.
1116:accommodate for crossover cables, patch cables and
3180:Overview of 802.3bt - Power over Ethernet standard
2978:"Ethernet Extender for POE and POE Plus equipment"
3311:Herbold, Jacob; Dwelley, Dave (27 October 2003),
687:or better for high power levels but allow using
3500:"Power over Ethernet (POE) proprietary pinouts"
2700:IEEE 802.3-2005, section 2, table 33-5, item 14
203:(PTZ), high-performance WAPs, or even charging
3234:
3232:
3230:
3228:
3226:
3216:
3214:
3204:
3202:
2691:IEEE 802.3-2005, section 2, table 33-5, item 4
2682:IEEE 802.3-2005, section 2, table 33-5, item 1
1254:Signals PSE is 802.3at capable. PD presents a
1214:Signals PSE is 802.3at capable. PD presents a
506:microwave and millimeter wave radios and some
3755:
3246:
3244:
3099:Roman Kleinerman; Daniel Feldman (May 2011),
1973:
1195:PSE detects resistor indicating power range (
659:The integration of PoE with the IEEE 802.3az
8:
434:Examples of devices powered by PoE include:
3627:"Power over Ethernet Interface Controllers"
3611:. Cisco Systems. 2014-07-11. Archived from
2709:IEEE 802.3-2005, section 2, clause 33.3.5.2
1196:
710:or can be injected into a cable run with a
493:in rooms and hallways, with time set using
247:PoE standard provides up to 15.4 W of
3762:
3748:
3740:
3431:
3429:
3427:
3425:
3264:33.1.4 Type 1 and Type 2 system parameters
3132:
3130:
3128:
2885:
2883:
2032:The rules for this power negotiation are:
30:"PoE" redirects here. For other uses, see
3407:IEEE 802.3-2008, section 2, clause 33.3.4
3258:
3256:
3022:IEEE 802.3-2008, section 2, clause 33.3.5
628:Power management features and integration
2231:
1853:
1725:
1536:
1318:
1150:
763:
639:switch with 48 Power over Ethernet ports
58:
3340:IEEE 802.3-2008, section 2, table 33-12
2661:
2637:
1523:Configuration via Ethernet layer 2 LLDP
1072:
510:units usually featuring proprietary PoE
369:
330:for the single-pair Ethernet standards
3389:IEEE 802.3-2018, section 2, table 33-9
137:, which uses the same two of the four
3672:"5 volt power over ethernet adapters"
2768:IEEE 802.3-2012 Standard for Ethernet
1123:In mode B, pins 4β5 (pair #1 in both
950:Maximum cable resistance per pairset
7:
4165:
3735:ieee802.org: IEEE 802.3bt Task Force
3730:ieee802.org: IEEE 802.3at Task Force
3725:ieee802.org: IEEE 802.3af Task Force
3076:Cabling Installation and Maintenance
2958:from the original on 8 December 2022
2052:reduced power, via conservation mode
1914:Extended power via MDI subtype
2267:1000 (1 gigabit) mode A+B (4PPoE),
1977:
1428:Valid for Type 2 (802.3at) devices,
1054:Mode A (endspan), Mode B (midspan)
3825:200, 400, 800 and 1600 Gbit/s
3514:"Power over Ethernet (POE) pinout"
3148:"Base Line Text for IEEE 802.3 BT"
2069:Some Cisco WLAN access points and
1485:Valid for Type 4 (802.3bt) devices
1450:Valid for Type 3 (802.3bt) devices
25:
3136:IEEE 802.3at-2009, clause 33.1.1c
2008:The setup phases are as follows:
1692:b7 power type: 1=Type 1; 0=Type 2
1152:Stages of powering up a PoE link
4164:
4153:
4152:
3031:IEEE 802.3at-2009, clause 33.3.7
2598:
2559:
2517:
2508:
2469:
2430:
2388:
2379:
2337:
2328:
2286:
2277:
570:(PSE) are devices that provide (
526:Intelligent lighting controllers
415:
403:
388:
372:
214:), common-mode data pair power (
3633:from the original on 2016-07-20
3589:from the original on 2009-02-02
3538:from the original on 2011-07-08
3480:from the original on 2010-09-23
3160:from the original on 2017-04-02
3115:from the original on 2016-04-16
3082:from the original on 2018-07-22
3053:from the original on 2017-11-26
2984:from the original on 2015-09-30
2869:from the original on 2021-01-22
2844:from the original on 2017-10-10
2819:from the original on 2017-04-10
1642:PSE allocated power value
1430:not allowed for 802.3af devices
845:Maximum power delivered by PSE
177:, this does not interfere with
3352:IEEE 802.3at-2009, table 33-18
3288:145.1.3.1 Cabling requirements
2196:various telecom applications.
1727:Legacy LLDP Power via MDI TLV
1633:PD requested power value
1316:to signal 802.3at capability.
1312:. An 802.3at PSE may also use
743:differential data transmission
584:(IEEE 802.3af refers to it as
487:and hallway speaker amplifiers
383:powered by Power over Ethernet
1:
3220:IEEE 802.3at-2009 Table 33-18
3208:IEEE 802.3at-2009 Table 33-11
3041:Dave Dwelley (Oct 26, 2003),
2112:Universal Power over Ethernet
1528:Link Layer Discovery Protocol
1360:Classification unimplemented
765:Comparison of PoE parameters
52:) particularly IEEE standard
3451:IEEE 802.1AB-2009 Annex F.3
3372:. p. 15. Archived from
3250:IEEE 802.3at-2009 Table 33-1
2915:. GarrettCom. Archived from
2174:
2057:Non-standard implementations
1830:b3 PSE pairs control ability
1671:b3 PSE pairs control ability
1299:
1294:
1281:
1276:
1263:
1260:
1241:
1238:
1223:
1220:
1081:switched-mode power supplies
1060:Mode A, Mode B, 4-pair Mode
262:PoE standard, also known as
3276:145.3.1 PD Type definitions
3003:1000BASE-T mid-span devices
3001:Cisco Aironet technotes on
1694:b6 power type: 1=PD; 0=PSE
1331:Classification current (mA)
691:if less power is required.
495:Network Time Protocol (NTP)
239:Two- and four-pair Ethernet
218:) and 4-pair transmission (
83:) describes any of several
4234:
3398:IEEE 802.3bt, table 145-26
2772:IEEE Standards Association
2633:
1859:Advanced Power Management
1824:b0 port class: 1=PSE; 0=PD
1665:b0 port class: 1=PSE; 0=PD
1624:Type/source priority
1037:Category 3 and Category 5
530:Light-Emitting Diode (LED)
305:and surveillance cameras.
130:The three techniques are:
43:
36:
29:
4148:
3547:2010-01-12 ciscopress.com
3416:IEEE 802.3 Clause 79.3.2
2795:145.1.3 System parameters
2611:
2597:
2572:
2558:
2482:
2468:
2443:
2429:
2385:White/orange stripe
2292:White/orange stripe
2266:
2262:1000 (1 gigabit) mode A,
2261:
2257:1000 (1 gigabit) mode B,
2256:
2251:
2246:
1872:
1866:
1863:
1737:
1734:
1551:
1548:
1484:
1449:
1201:
1184:
1162:
1159:
1156:
1009:steps negotiated by LLDP
1002:steps negotiated by LLDP
995:steps negotiated by LLDP
661:Energy-Efficient Ethernet
547:Inline Ethernet extenders
514:Industrial control system
185:of the standard Ethernet
4075:SFP/SFP+/QSFP/QSFP+/OSFP
3572:2010-01-12 conticomp.com
3323:(24): 61, archived from
3238:IEEE 802.3bt Table 145-1
2565:White/brown stripe
2394:White/green stripe
2283:White/green stripe
2160:used PowerDsine's older
2080:Cisco Discovery Protocol
1826:b1 PSE MDI power support
1667:b1 PSE MDI power support
698:over two or more of the
568:Power sourcing equipment
563:Power sourcing equipment
224:power sourcing equipment
149:use for data in typical
44:Not to be confused with
2475:White/blue stripe
1738:TLV information string
1552:TLV information string
1320:Power levels available
870:Voltage range (at PSE)
694:Power is supplied as a
675:Standard implementation
655:Integrating EEE and PoE
508:Free Space Optics (FSO)
322:Power over Data Lines (
3820:40 and 100 Gbit/s
2736:. IEEE. Archived from
1828:b2 PSE MDI power state
1669:b2 PSE MDI power state
1337:Max power from PSE (W)
1292:Supply power to device
1063:4-pair Mode Mandatory
895:Voltage range (at PD)
820:Power available at PD
702:of wires found in the
640:
610:wireless access points
485:public address systems
348:2.5GBASE-T1, 5GBASE-T1
303:wireless access points
175:differential signaling
101:wireless access points
73:
3815:25 and 50 Gbit/s
3805:2.5 and 5 Gbit/s
2909:"Power over Ethernet"
2200:Power capacity limits
1334:Power range at PD (W)
635:
580:, commonly called an
459:IP TV (IPTV) decoders
317:amendment introduced
234:Standards development
201:panβtiltβzoom cameras
97:twisted-pair Ethernet
66:wireless access point
62:
3598:2010-01-12 cisco.com
3013:visited 18 July 2011
2938:Makdessian, Alec M.
2812:. 30 November 2015.
2722:, September 11, 2009
2254:mixed DC & data
2164:PoE implementation.
1941:Power priority
1163:Volts specified (V)
747:transformer coupling
745:over each pair with
735:2.5GBASE-T, 5GBASE-T
733:(gigabit Ethernet),
396:Avaya IP Phone 1140E
309:Single-pair Ethernet
295:2.5GBASE-T, 5GBASE-T
32:Poe (disambiguation)
4198:Networking hardware
2913:Commercial web page
2774:, December 28, 2012
2234:
1984:Backup conservation
1873:Extended power via
1860:
1731:
1545:
1321:
1153:
766:
542:Point Of Sale (POS)
95:along with data on
77:Power over Ethernet
46:Ethernet over power
4203:Network appliances
3775:local area network
3653:PowerDsine Limited
3262:IEEE 802.3at-2009
3009:2011-08-02 at the
2919:on August 29, 2011
2232:
1932:Power source
1854:
1774:IEEE 802.3 subtype
1726:
1696:b5-4: power source
1588:IEEE 802.3 subtype
1541:Power via MDI TLV
1537:
1340:Class description
1319:
1314:LLDP communication
1151:
1034:Supported cabling
764:
700:differential pairs
696:common-mode signal
641:
364:Products using PoE
91:systems that pass
74:
4180:
4179:
4032:Energy Efficiency
3887:Ethernet Alliance
3453:Power Via MDI TLV
3418:Power Via MDI TLV
3317:Electronic Design
3188:Ethernet Alliance
3047:Electronic Design
2898:IEEE 802.3ch-2020
2889:IEEE 802.3cg-2019
2653:
2652:
2269:DC & bi-data
2264:DC & bi-data
2259:DC & bi-data
2186:Ubiquiti Networks
2015:PSE powers up PD.
2006:
2005:
1950:Power value
1852:
1851:
1801:Power class
1783:MDI power support
1729:IEEE 802.1AB-2009
1724:
1723:
1615:Power class
1597:MDI power support
1532:typeβlengthβvalue
1516:
1515:
1504:36β44 & 26β30
1488:36β44 & 17β20
1306:
1305:
1067:
1066:
985:Power management
920:Maximum current I
649:Ethernet Alliance
533:Lighting fixtures
315:IEEE 802.3bu-2016
279:IEEE 802.3bt-2018
260:IEEE 802.3at-2009
245:IEEE 802.3af-2003
187:pulse transformer
179:data transmission
16:(Redirected from
4225:
4168:
4167:
4156:
4155:
3764:
3757:
3750:
3741:
3707:
3704:
3698:
3697:
3692:. Archived from
3686:
3680:
3679:
3674:. Archived from
3668:
3662:
3661:
3656:, archived from
3648:
3642:
3641:
3639:
3638:
3623:
3617:
3616:
3605:
3599:
3597:
3595:
3594:
3579:
3573:
3571:
3569:
3563:. Archived from
3562:
3554:
3548:
3546:
3544:
3543:
3528:
3522:
3521:
3516:. Archived from
3510:
3504:
3503:
3496:
3490:
3488:
3486:
3485:
3479:
3472:
3464:
3455:
3449:
3443:
3433:
3420:
3414:
3408:
3405:
3399:
3396:
3390:
3387:
3381:
3380:
3378:
3367:
3359:
3353:
3350:
3341:
3338:
3329:
3328:
3308:
3302:
3296:
3290:
3284:
3278:
3272:
3266:
3260:
3251:
3248:
3239:
3236:
3221:
3218:
3209:
3206:
3197:
3196:
3195:
3194:
3185:
3175:
3169:
3168:
3166:
3165:
3159:
3152:
3143:
3137:
3134:
3123:
3122:
3121:
3120:
3114:
3107:
3096:
3090:
3089:
3088:
3087:
3067:
3061:
3060:
3059:
3058:
3038:
3032:
3029:
3023:
3020:
3014:
2999:
2993:
2992:
2990:
2989:
2974:
2968:
2967:
2965:
2963:
2957:
2948:Maxim Integrated
2944:
2935:
2929:
2928:
2926:
2924:
2905:
2899:
2896:
2890:
2887:
2878:
2877:
2875:
2874:
2859:
2853:
2852:
2850:
2849:
2834:
2828:
2827:
2825:
2824:
2818:
2811:
2803:
2797:
2791:
2785:
2782:
2776:
2775:
2764:
2758:
2755:
2749:
2748:
2746:
2745:
2730:
2724:
2723:
2716:
2710:
2707:
2701:
2698:
2692:
2689:
2683:
2680:
2674:
2673:
2666:
2645:
2642:
2602:
2563:
2521:
2512:
2473:
2434:
2392:
2383:
2341:
2332:
2290:
2281:
2235:
2114:
2113:
2104:
2100:
2096:
2077:
2001:
1997:
1955:
1946:
1937:
1928:
1923:Power type
1919:
1910:
1895:
1886:
1861:
1806:
1797:
1788:
1779:
1770:
1757:
1748:
1732:
1719:
1715:
1709:
1705:
1647:
1638:
1629:
1620:
1611:
1602:
1593:
1584:
1571:
1562:
1546:
1469:36-44 & 9β12
1322:
1302:
1297:
1289:Normal operation
1284:
1279:
1266:
1257:
1251:
1244:
1233:
1226:
1217:
1211:
1204:
1187:
1182:
1154:
1099:Powering devices
1093:
1090:
1084:
1077:
1051:Supported modes
1008:
1001:
994:
980:
975:
965:
955:
944:
938:
933:
928:
915:
910:
905:
900:
890:
885:
880:
875:
865:
860:
855:
850:
840:
835:
830:
825:
807:
794:
785:
776:
775:(802.3at Type 1)
767:
755:crossover cables
689:category 3 cable
685:category 5 cable
419:
407:
398:with PoE support
392:
376:
327:
326:
254:
205:laptop batteries
191:Gigabit Ethernet
21:
4233:
4232:
4228:
4227:
4226:
4224:
4223:
4222:
4183:
4182:
4181:
4176:
4144:
4098:
4056:
4000:
3929:
3891:
3870:
3846:Autonegotiation
3829:
3795:100 Mbit/s
3778:
3768:
3716:
3711:
3710:
3705:
3701:
3688:
3687:
3683:
3670:
3669:
3665:
3650:
3649:
3645:
3636:
3634:
3625:
3624:
3620:
3607:
3606:
3602:
3592:
3590:
3581:
3580:
3576:
3567:
3560:
3556:
3555:
3551:
3541:
3539:
3530:
3529:
3525:
3512:
3511:
3507:
3498:
3497:
3493:
3483:
3481:
3477:
3470:
3466:
3465:
3458:
3450:
3446:
3434:
3423:
3415:
3411:
3406:
3402:
3397:
3393:
3388:
3384:
3376:
3365:
3361:
3360:
3356:
3351:
3344:
3339:
3332:
3310:
3309:
3305:
3297:
3293:
3285:
3281:
3273:
3269:
3261:
3254:
3249:
3242:
3237:
3224:
3219:
3212:
3207:
3200:
3192:
3190:
3183:
3177:
3176:
3172:
3163:
3161:
3157:
3150:
3145:
3144:
3140:
3135:
3126:
3118:
3116:
3112:
3105:
3098:
3097:
3093:
3085:
3083:
3069:
3068:
3064:
3056:
3054:
3040:
3039:
3035:
3030:
3026:
3021:
3017:
3011:Wayback Machine
3000:
2996:
2987:
2985:
2976:
2975:
2971:
2961:
2959:
2955:
2942:
2937:
2936:
2932:
2922:
2920:
2907:
2906:
2902:
2897:
2893:
2888:
2881:
2872:
2870:
2861:
2860:
2856:
2847:
2845:
2836:
2835:
2831:
2822:
2820:
2816:
2809:
2805:
2804:
2800:
2792:
2788:
2783:
2779:
2766:
2765:
2761:
2756:
2752:
2743:
2741:
2732:
2731:
2727:
2718:
2717:
2713:
2708:
2704:
2699:
2695:
2690:
2686:
2681:
2677:
2668:
2667:
2663:
2658:
2649:
2648:
2643:
2639:
2603:
2564:
2522:
2513:
2474:
2435:
2393:
2384:
2342:
2333:
2291:
2282:
2268:
2263:
2258:
2253:
2252:10/100 mode A,
2248:
2247:10/100 mode B,
2238:Pins at switch
2230:
2224:on the design.
2202:
2170:
2134:
2126:
2111:
2110:
2102:
2098:
2094:
2091:low-pass filter
2087:fast link pulse
2075:
2067:
2059:
1999:
1995:
1991:
1989:
1953:
1951:
1944:
1942:
1935:
1933:
1926:
1924:
1917:
1915:
1908:
1906:
1893:
1891:
1884:
1882:
1847:
1845:
1843:
1841:
1836:
1831:
1829:
1827:
1825:
1804:
1802:
1795:
1793:
1786:
1784:
1777:
1775:
1768:
1766:
1755:
1753:
1746:
1744:
1717:
1713:
1707:
1703:
1699:
1697:
1695:
1693:
1688:
1686:
1684:
1682:
1677:
1672:
1670:
1668:
1666:
1645:
1643:
1636:
1634:
1627:
1625:
1618:
1616:
1609:
1607:
1600:
1598:
1591:
1589:
1582:
1580:
1569:
1567:
1560:
1558:
1543:IEEE 802.3-2015
1525:
1453:36β44 & 1β4
1429:
1380:Very Low power
1300:
1295:
1282:
1277:
1274:Startup voltage
1264:
1255:
1249:
1242:
1231:
1224:
1215:
1209:
1202:
1185:
1180:
1101:
1096:
1091:
1087:
1078:
1074:
1057:Mode A, Mode B
1026:
1006:
999:
992:
978:
973:
963:
953:
942:
936:
931:
926:
923:
913:
908:
903:
898:
888:
883:
878:
873:
863:
858:
853:
848:
838:
833:
828:
823:
805:
792:
783:
774:
708:Ethernet switch
681:IEEE 802.3-2005
677:
657:
630:
602:
565:
560:
432:
431:
430:
427:
420:
411:
408:
399:
393:
384:
377:
366:
365:
360:
324:
323:
311:
272:IEEE 802.3-2012
252:
251:power (minimum
241:
236:
117:
57:
42:
35:
28:
23:
22:
15:
12:
11:
5:
4231:
4229:
4221:
4220:
4218:Power supplies
4215:
4213:IEEE standards
4210:
4208:Electric power
4205:
4200:
4195:
4185:
4184:
4178:
4177:
4175:
4174:
4162:
4149:
4146:
4145:
4143:
4142:
4137:
4132:
4127:
4122:
4117:
4112:
4106:
4104:
4100:
4099:
4097:
4096:
4091:
4086:
4077:
4072:
4066:
4064:
4058:
4057:
4055:
4054:
4049:
4044:
4039:
4034:
4029:
4024:
4019:
4014:
4008:
4006:
4002:
4001:
3999:
3998:
3993:
3988:
3983:
3978:
3973:
3968:
3963:
3958:
3953:
3948:
3943:
3937:
3935:
3931:
3930:
3928:
3927:
3926:
3925:
3915:
3910:
3905:
3899:
3897:
3893:
3892:
3890:
3889:
3884:
3878:
3876:
3872:
3871:
3869:
3868:
3863:
3858:
3853:
3848:
3843:
3841:Physical layer
3837:
3835:
3831:
3830:
3828:
3827:
3822:
3817:
3812:
3810:10 Gbit/s
3807:
3802:
3797:
3792:
3790:10 Mbit/s
3786:
3784:
3780:
3779:
3769:
3767:
3766:
3759:
3752:
3744:
3738:
3737:
3732:
3727:
3722:
3715:
3714:External links
3712:
3709:
3708:
3699:
3696:on 2010-06-20.
3681:
3678:on 2013-07-02.
3663:
3643:
3618:
3615:on 2017-11-28.
3600:
3574:
3570:on 2010-11-06.
3549:
3523:
3520:on 2015-04-01.
3505:
3491:
3456:
3444:
3421:
3409:
3400:
3391:
3382:
3379:on 2011-07-13.
3370:cds.linear.com
3354:
3342:
3330:
3303:
3291:
3279:
3267:
3252:
3240:
3222:
3210:
3198:
3170:
3138:
3124:
3091:
3062:
3033:
3024:
3015:
2994:
2969:
2930:
2900:
2891:
2879:
2865:. 2017-03-13.
2854:
2840:. 2017-03-17.
2829:
2798:
2786:
2777:
2759:
2750:
2725:
2711:
2702:
2693:
2684:
2675:
2660:
2659:
2657:
2654:
2651:
2650:
2647:
2646:
2636:
2635:
2631:
2630:
2627:
2624:
2622:
2619:
2616:
2613:
2610:
2607:
2605:
2596:
2592:
2591:
2588:
2585:
2583:
2580:
2577:
2574:
2571:
2568:
2566:
2557:
2553:
2552:
2549:
2546:
2543:
2540:
2538:
2535:
2532:
2529:
2527:
2524:
2515:
2506:
2502:
2501:
2498:
2495:
2493:
2490:
2487:
2484:
2481:
2478:
2476:
2467:
2463:
2462:
2459:
2456:
2454:
2451:
2448:
2445:
2442:
2439:
2437:
2428:
2424:
2423:
2420:
2417:
2414:
2411:
2409:
2406:
2403:
2400:
2398:
2395:
2386:
2377:
2373:
2372:
2369:
2366:
2363:
2360:
2358:
2355:
2352:
2349:
2347:
2344:
2335:
2326:
2322:
2321:
2318:
2315:
2312:
2309:
2307:
2304:
2301:
2298:
2296:
2293:
2284:
2275:
2271:
2270:
2265:
2260:
2255:
2250:
2245:
2242:
2239:
2229:
2226:
2221:
2220:
2217:
2201:
2198:
2175:Β§ Pinouts
2169:
2166:
2162:Power over LAN
2139:, acquired by
2133:
2130:
2125:
2124:Analog Devices
2122:
2066:
2063:
2058:
2055:
2054:
2053:
2046:
2043:
2040:
2037:
2030:
2029:
2028:
2027:
2021:
2018:
2017:
2016:
2004:
2003:
1993:
1986:
1980:
1971:
1968:
1965:
1962:
1958:
1957:
1948:
1939:
1930:
1921:
1912:
1897:
1888:
1878:
1877:
1871:
1865:
1850:
1849:
1838:
1833:
1832:b7-4 reserved
1822:
1819:
1816:
1813:
1809:
1808:
1799:
1792:PSE power pair
1790:
1781:
1772:
1759:
1750:
1740:
1739:
1736:
1722:
1721:
1711:
1701:
1698:b3-2: reserved
1690:
1679:
1674:
1673:b7-4 reserved
1663:
1660:
1657:
1654:
1650:
1649:
1640:
1631:
1622:
1613:
1606:PSE power pair
1604:
1595:
1586:
1573:
1564:
1554:
1553:
1550:
1524:
1521:
1514:
1513:
1511:
1508:
1505:
1502:
1498:
1497:
1495:
1492:
1489:
1486:
1483:
1479:
1478:
1476:
1473:
1470:
1467:
1463:
1462:
1460:
1457:
1454:
1451:
1448:
1444:
1443:
1440:
1437:
1434:
1431:
1426:
1422:
1421:
1418:
1415:
1412:
1409:
1406:
1402:
1401:
1398:
1395:
1392:
1389:
1386:
1382:
1381:
1378:
1375:
1372:
1369:
1366:
1362:
1361:
1358:
1355:
1352:
1349:
1346:
1342:
1341:
1338:
1335:
1332:
1329:
1326:
1304:
1303:
1298:
1293:
1290:
1286:
1285:
1280:
1275:
1272:
1268:
1267:
1262:
1259:
1252:
1246:
1245:
1240:
1237:
1234:
1228:
1227:
1222:
1219:
1212:
1206:
1205:
1200:
1193:
1192:Classification
1189:
1188:
1183:
1177:
1173:
1172:
1169:
1165:
1164:
1161:
1158:
1100:
1097:
1095:
1094:
1085:
1071:
1065:
1064:
1061:
1058:
1055:
1052:
1048:
1047:
1044:
1041:
1038:
1035:
1031:
1030:
1027:
1024:
1021:
1018:
1015:
1011:
1010:
1003:
996:
989:
986:
982:
981:
976:
971:
961:
951:
947:
946:
940:
934:
929:
924:
921:
917:
916:
911:
906:
901:
896:
892:
891:
886:
881:
876:
871:
867:
866:
861:
856:
851:
846:
842:
841:
836:
831:
826:
821:
817:
816:
806:802.3bt Type 4
803:
793:802.3bt Type 3
790:
784:802.3at Type 2
781:
771:
676:
673:
656:
653:
637:Avaya ERS 5500
629:
626:
606:powered device
601:
600:Powered device
598:
578:network switch
564:
561:
559:
556:
555:
554:
548:
545:
538:
535:
523:
520:Access control
517:
511:
504:point to point
500:
497:
488:
478:
471:network switch
467:
461:
456:
451:
442:
429:
428:
421:
414:
412:
409:
402:
400:
394:
387:
385:
378:
371:
368:
367:
363:
362:
361:
359:
356:
310:
307:
240:
237:
235:
232:
228:powered device
167:
166:
160:
154:
127:since 2003.
116:
113:
93:electric power
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
4230:
4219:
4216:
4214:
4211:
4209:
4206:
4204:
4201:
4199:
4196:
4194:
4191:
4190:
4188:
4173:
4172:
4163:
4161:
4160:
4151:
4150:
4147:
4141:
4138:
4136:
4133:
4131:
4128:
4126:
4123:
4121:
4118:
4116:
4113:
4111:
4108:
4107:
4105:
4101:
4095:
4092:
4090:
4087:
4085:
4081:
4078:
4076:
4073:
4071:
4068:
4067:
4065:
4063:
4059:
4053:
4050:
4048:
4045:
4043:
4040:
4038:
4035:
4033:
4030:
4028:
4025:
4023:
4020:
4018:
4015:
4013:
4010:
4009:
4007:
4003:
3997:
3994:
3992:
3989:
3987:
3984:
3982:
3979:
3977:
3974:
3972:
3969:
3967:
3964:
3962:
3959:
3957:
3954:
3952:
3949:
3947:
3944:
3942:
3939:
3938:
3936:
3932:
3924:
3921:
3920:
3919:
3916:
3914:
3911:
3909:
3906:
3904:
3901:
3900:
3898:
3894:
3888:
3885:
3883:
3880:
3879:
3877:
3875:Organizations
3873:
3867:
3864:
3862:
3859:
3857:
3854:
3852:
3849:
3847:
3844:
3842:
3839:
3838:
3836:
3832:
3826:
3823:
3821:
3818:
3816:
3813:
3811:
3808:
3806:
3803:
3801:
3800:1 Gbit/s
3798:
3796:
3793:
3791:
3788:
3787:
3785:
3781:
3776:
3772:
3765:
3760:
3758:
3753:
3751:
3746:
3745:
3742:
3736:
3733:
3731:
3728:
3726:
3723:
3721:
3718:
3717:
3713:
3703:
3700:
3695:
3691:
3685:
3682:
3677:
3673:
3667:
3664:
3660:on 2012-07-28
3659:
3655:
3654:
3647:
3644:
3632:
3628:
3622:
3619:
3614:
3610:
3604:
3601:
3588:
3584:
3578:
3575:
3566:
3559:
3553:
3550:
3537:
3533:
3527:
3524:
3519:
3515:
3509:
3506:
3501:
3495:
3492:
3476:
3469:
3463:
3461:
3457:
3454:
3448:
3445:
3442:
3438:
3432:
3430:
3428:
3426:
3422:
3419:
3413:
3410:
3404:
3401:
3395:
3392:
3386:
3383:
3375:
3371:
3364:
3358:
3355:
3349:
3347:
3343:
3337:
3335:
3331:
3327:on 2005-03-20
3326:
3322:
3318:
3314:
3307:
3304:
3301:
3295:
3292:
3289:
3286:IEEE 802.3bt
3283:
3280:
3277:
3274:IEEE 802.3bt
3271:
3268:
3265:
3259:
3257:
3253:
3247:
3245:
3241:
3235:
3233:
3231:
3229:
3227:
3223:
3217:
3215:
3211:
3205:
3203:
3199:
3189:
3182:
3181:
3174:
3171:
3156:
3149:
3142:
3139:
3133:
3131:
3129:
3125:
3111:
3104:
3103:
3095:
3092:
3081:
3077:
3073:
3066:
3063:
3052:
3048:
3044:
3037:
3034:
3028:
3025:
3019:
3016:
3012:
3008:
3004:
2998:
2995:
2983:
2979:
2973:
2970:
2954:
2950:
2949:
2941:
2934:
2931:
2918:
2914:
2910:
2904:
2901:
2895:
2892:
2886:
2884:
2880:
2868:
2864:
2858:
2855:
2843:
2839:
2833:
2830:
2815:
2808:
2802:
2799:
2796:
2793:IEEE 802.3bt
2790:
2787:
2781:
2778:
2773:
2769:
2763:
2760:
2754:
2751:
2740:on 2012-10-16
2739:
2735:
2729:
2726:
2721:
2715:
2712:
2706:
2703:
2697:
2694:
2688:
2685:
2679:
2676:
2671:
2665:
2662:
2655:
2641:
2638:
2632:
2628:
2625:
2623:
2620:
2617:
2614:
2608:
2606:
2601:
2594:
2593:
2589:
2586:
2584:
2581:
2578:
2575:
2569:
2567:
2562:
2555:
2554:
2550:
2547:
2544:
2541:
2539:
2536:
2533:
2530:
2528:
2525:
2520:
2516:
2514:Orange solid
2511:
2507:
2504:
2503:
2499:
2496:
2494:
2491:
2488:
2485:
2479:
2477:
2472:
2465:
2464:
2460:
2457:
2455:
2452:
2449:
2446:
2440:
2438:
2433:
2426:
2425:
2421:
2418:
2415:
2412:
2410:
2407:
2404:
2401:
2399:
2396:
2391:
2387:
2382:
2378:
2375:
2374:
2370:
2367:
2364:
2361:
2359:
2356:
2353:
2350:
2348:
2345:
2343:Orange solid
2340:
2336:
2331:
2327:
2324:
2323:
2319:
2316:
2313:
2310:
2308:
2305:
2302:
2299:
2297:
2294:
2289:
2285:
2280:
2276:
2273:
2272:
2249:DC on spares
2243:
2240:
2237:
2236:
2227:
2225:
2218:
2215:
2214:
2213:
2211:
2208:TR 29125 and
2207:
2199:
2197:
2193:
2191:
2187:
2182:
2178:
2176:
2167:
2165:
2163:
2159:
2155:
2151:
2147:
2142:
2138:
2131:
2129:
2123:
2121:
2119:
2115:
2106:
2092:
2088:
2083:
2081:
2072:
2064:
2062:
2056:
2051:
2047:
2044:
2041:
2038:
2035:
2034:
2033:
2025:
2024:
2022:
2019:
2014:
2013:
2011:
2010:
2009:
1994:
1987:
1985:
1981:
1979:
1975:
1972:
1969:
1966:
1963:
1960:
1959:
1949:
1940:
1931:
1922:
1913:
1904:
1901:
1898:
1889:
1880:
1879:
1876:
1869:
1862:
1858:
1855:Legacy LLDP-
1839:
1837:2=spare pair
1835:1=signal pair
1834:
1823:
1820:
1817:
1814:
1811:
1810:
1800:
1791:
1782:
1773:
1764:
1760:
1751:
1742:
1741:
1733:
1730:
1712:
1702:
1691:
1680:
1678:2=spare pair
1676:1=signal pair
1675:
1664:
1661:
1658:
1655:
1652:
1651:
1641:
1632:
1623:
1614:
1605:
1596:
1587:
1578:
1574:
1565:
1556:
1555:
1547:
1544:
1540:
1535:
1533:
1529:
1522:
1520:
1512:
1509:
1507:71.3 (4-pair)
1506:
1503:
1500:
1499:
1496:
1493:
1490:
1487:
1481:
1480:
1477:
1474:
1471:
1468:
1465:
1464:
1461:
1458:
1455:
1452:
1446:
1445:
1441:
1438:
1435:
1432:
1427:
1424:
1423:
1419:
1416:
1413:
1410:
1407:
1404:
1403:
1399:
1396:
1393:
1390:
1387:
1384:
1383:
1379:
1376:
1373:
1370:
1367:
1364:
1363:
1359:
1356:
1353:
1350:
1347:
1344:
1343:
1339:
1336:
1333:
1330:
1327:
1324:
1323:
1317:
1315:
1311:
1291:
1288:
1287:
1273:
1270:
1269:
1253:
1248:
1247:
1235:
1230:
1229:
1213:
1208:
1207:
1198:
1194:
1191:
1190:
1178:
1175:
1174:
1170:
1167:
1166:
1155:
1149:
1147:
1141:
1137:
1135:
1129:
1126:
1121:
1119:
1114:
1109:
1106:
1098:
1089:
1086:
1082:
1076:
1073:
1070:
1062:
1059:
1056:
1053:
1050:
1049:
1045:
1042:
1039:
1036:
1033:
1032:
1028:
1022:
1019:
1016:
1013:
1012:
1004:
997:
990:
987:
984:
983:
977:
972:
969:
962:
959:
952:
949:
948:
941:
935:
930:
925:
919:
918:
912:
907:
902:
897:
894:
893:
887:
882:
877:
872:
869:
868:
862:
857:
852:
847:
844:
843:
837:
832:
827:
822:
819:
818:
815:
811:
804:
802:
798:
791:
789:
782:
780:
772:
769:
768:
762:
760:
756:
752:
748:
744:
740:
736:
732:
728:
724:
720:
719:phantom power
715:
713:
709:
705:
701:
697:
692:
690:
686:
682:
674:
672:
670:
666:
662:
654:
652:
650:
646:
638:
634:
627:
625:
621:
619:
615:
611:
607:
599:
597:
595:
591:
587:
583:
579:
575:
574:
569:
562:
557:
553:
549:
546:
543:
539:
536:
534:
531:
527:
524:
521:
518:
515:
512:
509:
505:
501:
498:
496:
492:
489:
486:
482:
479:
476:
472:
468:
466:
462:
460:
457:
455:
452:
450:
446:
443:
440:
437:
436:
435:
425:
418:
413:
406:
401:
397:
391:
386:
382:
375:
370:
357:
355:
353:
349:
345:
340:
337:
333:
329:
320:
316:
308:
306:
304:
300:
296:
292:
288:
284:
280:
275:
274:publication.
273:
269:
268:PoE plus
265:
261:
256:
250:
246:
243:The original
238:
233:
231:
229:
225:
221:
217:
216:Alternative A
213:
212:Alternative B
208:
206:
202:
198:
194:
192:
188:
184:
180:
176:
172:
171:phantom power
164:
161:
158:
157:alternative B
155:
152:
148:
144:
140:
136:
135:alternative A
133:
132:
131:
128:
126:
122:
114:
112:
110:
106:
102:
98:
94:
90:
86:
82:
78:
71:
67:
61:
55:
51:
47:
40:
33:
19:
4169:
4157:
4062:Transceivers
4046:
4005:Applications
3908:Twisted pair
3856:Flow control
3777:technologies
3702:
3694:the original
3684:
3676:the original
3666:
3658:the original
3652:
3646:
3635:. Retrieved
3621:
3613:the original
3603:
3591:. Retrieved
3577:
3565:the original
3552:
3540:. Retrieved
3526:
3518:the original
3508:
3494:
3482:. Retrieved
3452:
3447:
3417:
3412:
3403:
3394:
3385:
3374:the original
3369:
3357:
3325:the original
3320:
3316:
3306:
3300:33.3.1 PD PI
3299:
3294:
3287:
3282:
3275:
3270:
3263:
3191:, retrieved
3179:
3173:
3162:. Retrieved
3141:
3117:, retrieved
3101:
3094:
3084:, retrieved
3075:
3065:
3055:, retrieved
3046:
3036:
3027:
3018:
2997:
2986:. Retrieved
2972:
2960:. Retrieved
2946:
2933:
2921:. Retrieved
2917:the original
2912:
2903:
2894:
2871:. Retrieved
2857:
2846:. Retrieved
2832:
2821:. Retrieved
2801:
2794:
2789:
2780:
2767:
2762:
2753:
2742:. Retrieved
2738:the original
2728:
2719:
2714:
2705:
2696:
2687:
2678:
2670:802.3af-2003
2669:
2664:
2640:
2604:Brown solid
2523:Green solid
2334:Green solid
2244:T568B color
2241:T568A color
2222:
2203:
2194:
2183:
2179:
2171:
2161:
2135:
2127:
2117:
2109:
2107:
2084:
2068:
2060:
2049:
2031:
2007:
1728:
1542:
1526:
1517:
1309:
1307:
1142:
1138:
1133:
1130:
1122:
1110:
1102:
1088:
1075:
1068:
813:
809:
800:
796:
787:
778:
759:diode bridge
716:
711:
693:
678:
668:
658:
642:
622:
605:
603:
593:
589:
585:
581:
571:
567:
566:
552:mobile phone
433:
341:
321:
318:
314:
312:
286:
282:
278:
276:
267:
263:
259:
257:
244:
242:
227:
223:
219:
215:
211:
209:
196:
195:
168:
162:
156:
139:signal pairs
134:
129:
118:
80:
76:
75:
70:power outlet
4052:Synchronous
4027:Data center
3298:IEEE 802.3
3108:, Marvell,
2962:17 February
2672:, June 2003
2436:Blue solid
2071:VoIP phones
1881:Type
1864:TLV Header
1761:IEEE 802.3
1743:Type
1735:TLV Header
1575:IEEE 802.3
1557:Type
1549:TLV Header
1491:62 (4-pair)
1472:51 (4-pair)
1456:40 (4-pair)
1442:High power
1436:12.95β25.50
1134:power class
1046:Category 5
1043:Category 5
1040:Category 5
914:41.1β57.0 V
909:42.5β57.0 V
904:42.5β57.0 V
899:37.0β57.0 V
889:52.0β57.0 V
884:50.0β57.0 V
879:50.0β57.0 V
874:44.0β57.0 V
751:common mode
645:AC adapters
614:VoIP phones
592:, called a
558:Terminology
491:Wall clocks
422:Cisco 7906
336:1000BASE-T1
319:single-pair
109:VoIP phones
4187:Categories
4103:Interfaces
4037:Industrial
4017:Automotive
3996:Long Reach
3918:First mile
3882:IEEE 802.3
3773:family of
3637:2016-07-27
3593:2010-01-12
3542:2010-01-12
3489:2010-01-10
3484:2010-01-10
3193:2024-08-19
3164:2017-04-02
3119:2016-08-31
3086:2018-07-21
3057:2018-07-21
2988:2015-10-26
2873:2021-01-16
2848:2017-10-30
2823:2017-04-09
2744:2010-06-24
2656:References
2137:PowerDsine
1982:Normal or
1848:5=class 4
1689:5=class 4
1420:Mid power
1414:6.49β12.95
1400:Low power
1354:0.44β12.94
1181:19β26.5 kΞ©
1118:Auto MDI-X
1105:100BASE-TX
968:Category 5
958:Category 3
731:1000BASE-T
727:100BASE-TX
618:IP cameras
447:including
445:IP cameras
424:VoIP phone
352:10GBASE-T1
332:100BASE-T1
226:(PSE) and
183:center tap
151:Cat 5
147:100BASE-TX
125:IEEE 802.3
115:Techniques
105:IP cameras
3991:LattisNet
3986:100BaseVG
3961:10BASE-FL
3956:10BASE-FB
3951:10BROAD36
3851:EtherType
2923:August 6,
2141:Microsemi
2132:Microsemi
2103:5 seconds
1996:0β102.3 W
1988:Critical,
1967:00-12-BB
1846:4=class 3
1844:3=class 2
1842:2=class 1
1840:1=class 0
1818:00-12-0F
1687:4=class 3
1685:3=class 2
1683:2=class 1
1681:1=class 0
1659:00-12-0F
1394:3.84β6.49
1374:0.44β3.84
1256:0.25β4 mA
1243:14.5β20.5
1216:0.25β4 mA
1203:14.5β20.5
1197:see below
1176:Detection
945:per pair
939:per pair
770:Property
739:10GBASE-T
381:IP camera
344:10BASE-T1
299:10GBASE-T
123:standard
85:standards
54:IEEE 1901
4193:Ethernet
4159:Category
3934:Historic
3923:10G-EPON
3771:Ethernet
3631:Archived
3587:Archived
3536:Archived
3475:Archived
3155:Archived
3110:archived
3080:archived
3051:archived
3007:Archived
2982:Archived
2953:Archived
2867:Archived
2842:Archived
2814:Archived
2626:TxRx D β
2621:TxRx D β
2615:TxRx D β
2587:TxRx D +
2582:TxRx D +
2576:TxRx D +
2548:TxRx B β
2542:TxRx B β
2537:TxRx B β
2497:TxRx C β
2492:TxRx C β
2486:TxRx C β
2458:TxRx C +
2453:TxRx C +
2447:TxRx C +
2419:TxRx B +
2413:TxRx B +
2408:TxRx B +
2368:TxRx A β
2362:TxRx A β
2357:TxRx A β
2317:TxRx A +
2311:TxRx A +
2306:TxRx A +
2190:MikroTik
2048:PSE may
1954:2 octets
1909:3 octets
1769:3 octets
1714:0β25.5 W
1704:0β25.5 W
1646:2 octets
1637:2 octets
1583:3 octets
1408:Optional
1388:Optional
1368:Optional
1186:2.7β10.1
1171:802.3at
1168:802.3af
773:802.3af
723:10BASE-T
704:Ethernet
596:device.
590:injector
586:endpoint
502:Outdoor
481:Intercom
463:Network
426:with PoE
153:cabling.
143:10BASE-T
103:(WAPs),
50:HomePlug
4171:Commons
4022:Carrier
3971:10BASE2
3966:10BASE5
3946:StarLAN
3941:CSMA/CD
3913:Coaxial
3834:General
2634:Notes:
2612:Unused
2573:Unused
2483:Unused
2444:Unused
2228:Pinouts
2210:Cenelec
2206:ISO/IEC
2168:Passive
2146:Polycom
2095:48 V DC
2050:request
1918:1 octet
1890:Length
1870:Header
1805:1 octet
1796:1 octet
1787:1 octet
1778:1 octet
1752:Length
1628:1 octet
1619:1 octet
1610:1 octet
1601:1 octet
1592:1 octet
1566:Length
1348:Default
1301:42.5β57
1283:> 42
1278:> 42
1271:Startup
1232:Class 2
1160:Action
1069:Notes:
849:15.40 W
829:25.50 W
824:12.95 W
712:midspan
665:Marvell
594:midspan
582:endspan
540:Remote
469:A mini
465:routers
253:44 V DC
18:802.3cq
4080:XENPAK
3866:Jumbos
3861:Frames
3783:Speeds
3439:
2595:Pin 8
2556:Pin 7
2505:Pin 6
2466:Pin 5
2427:Pin 4
2376:Pin 3
2325:Pin 2
2274:Pin 1
2158:Nortel
2154:Lucent
2002:steps
1945:4 bits
1936:2 bits
1927:2 bits
1905:
1894:9 bits
1885:7 bits
1765:
1756:9 bits
1747:7 bits
1720:steps
1710:steps
1579:
1570:9 bits
1561:7 bits
1310:Type 2
1258:load.
1250:Mark 2
1218:load.
1210:Mark 1
1157:Stage
1146:10/100
979:12.5 Ξ©
974:12.5 Ξ©
964:12.5 Ξ©
943:960 mA
937:600 mA
932:600 mA
927:350 mA
854:30.0 W
839:71.3 W
737:, and
616:, and
573:source
544:kiosks
475:uplink
441:phones
350:, and
189:. For
89:ad hoc
4135:XGMII
4047:Power
4042:Metro
4012:Audio
3981:FOIRL
3903:Fiber
3896:Media
3568:(PDF)
3561:(PDF)
3478:(PDF)
3471:(PDF)
3435:IETF
3377:(PDF)
3366:(PDF)
3184:(PDF)
3158:(PDF)
3151:(PDF)
3113:(PDF)
3106:(PDF)
2956:(PDF)
2943:(PDF)
2817:(PDF)
2810:(PDF)
2629:DC β
2618:DC β
2609:DC β
2590:DC β
2579:DC β
2570:DC β
2551:DC β
2545:DC β
2534:DC β
2500:DC +
2489:DC +
2480:DC +
2461:DC +
2450:DC +
2441:DC +
2422:DC β
2416:DC β
2405:DC β
2371:DC +
2365:DC +
2354:DC +
2320:DC +
2314:DC +
2303:DC +
2099:6.3 W
2065:Cisco
2000:0.1 W
1990:High,
1718:0.1 W
1708:0.1 W
1433:35β45
1411:25β31
1391:16β21
1328:Usage
1325:Class
1296:37β57
1125:T568A
1113:T568B
1079:Most
1017:None
1007:0.1 W
1000:0.1 W
993:0.1 W
814:PoE++
810:4PPoE
801:PoE++
797:4PPoE
669:EEPoE
287:4PPoE
283:PoE++
220:4PPoE
197:4PPoE
163:4PPoE
141:that
39:PPPoE
4140:XAUI
4130:GMII
4070:GBIC
3441:3621
2964:2024
2925:2011
2531:Tx β
2526:Tx β
2402:Tx +
2397:Tx +
2351:Rx β
2346:Rx β
2300:Rx +
2295:Rx +
2204:The
2156:and
2150:3Com
2118:UPOE
2097:and
2076:10 W
1992:Low
1961:127
1812:127
1653:127
1539:LLDP
1417:15.4
1397:7.00
1377:4.00
1371:8β13
1357:15.4
1265:7β10
1225:7β10
954:20 Ξ©
864:90 W
859:60 W
834:51 W
788:PoE+
725:and
528:and
483:and
454:WAPs
449:PTZs
439:VoIP
358:Uses
334:and
325:PoDL
313:The
297:and
277:The
264:PoE+
258:The
145:and
107:and
4125:MII
4120:MDI
4115:EAD
4110:AUI
4094:CFP
4089:XFP
3976:MAU
3437:RFC
1998:in
1976:or
1974:PSE
1903:OUI
1900:TIA
1875:MDI
1868:MED
1857:MED
1763:OUI
1716:in
1706:in
1656:12
1577:OUI
1351:0β5
1025:max
922:max
812:or
799:or
779:PoE
667:'s
379:An
285:or
266:or
87:or
81:PoE
4189::
4084:X2
3629:.
3585:.
3534:.
3473:.
3459:^
3424:^
3368:.
3345:^
3333:^
3321:51
3319:,
3315:,
3255:^
3243:^
3225:^
3213:^
3201:^
3186:,
3153:.
3127:^
3078:,
3074:,
3049:,
3045:,
3005:,
2980:.
2951:.
2945:.
2911:.
2882:^
2770:,
2188:,
2152:,
2148:,
1978:PD
1970:4
1964:7
1956:)
1947:)
1938:)
1929:)
1920:)
1911:)
1896:)
1887:)
1821:2
1815:7
1807:)
1798:)
1789:)
1780:)
1771:)
1758:)
1749:)
1662:2
1648:)
1639:)
1630:)
1621:)
1612:)
1603:)
1594:)
1585:)
1572:)
1563:)
1510:90
1494:75
1475:60
1459:45
1439:30
1199:)
1120:.
970:)
960:)
808:,
795:,
786:,
777:,
761:.
717:A
620:.
612:,
604:A
346:,
291:mA
249:DC
207:.
111:.
4082:/
3763:e
3756:t
3749:v
3640:.
3596:.
3545:.
3502:.
3487:.
3167:.
2991:.
2966:.
2927:.
2876:.
2851:.
2826:.
2747:.
2116:(
1952:(
1943:(
1934:(
1925:(
1916:(
1907:(
1892:(
1883:(
1803:(
1794:(
1785:(
1776:(
1767:(
1754:(
1745:(
1644:(
1635:(
1626:(
1617:(
1608:(
1599:(
1590:(
1581:(
1568:(
1559:(
1501:8
1482:7
1466:6
1447:5
1425:4
1405:3
1385:2
1365:1
1345:0
1261:β
1239:β
1221:β
966:(
956:(
328:)
79:(
56:.
48:(
41:.
34:.
20:)
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