TheKusintha kwa PoEndi chosinthira chomwe chimathandizira magetsi ku chingwe cha netiweki.Poyerekeza ndi chosinthira wamba, cholumikizira magetsi (monga AP, kamera ya digito, ndi zina zotero) sichiyenera kuyimitsidwa ndi mawaya amagetsi, ndipo kudalirika kwa netiweki yonse ndikokwera.
Mwachidule cha Power Over Ethernet (POE) POE (Power Over Ethernet) imatanthawuza kugwiritsa ntchito ma terminals a IP (monga matelefoni a IP, malo olowera opanda zingwe a LAN (APs, makamera a netiweki, ndi zina) atha kupereka ukadaulo wamagetsi wa DC pazinthu zotere. Zipangizo potumiza ma data.Tekinoloje ya POE imatha kuwonetsetsa kuti maukonde omwe alipo akuyenda bwino ndikuwonetsetsa chitetezo cha ma cabling omwe alipo, kuchepetsa ndalama.
POE imadziwikanso ngati njira yopangira magetsi kutengera netiweki yapafupi (POL, Power over LAN) kapena Active Ethernet (Active Ethernet), nthawi zina amatchedwanso Power over Ethernet mwachidule.Uku ndiko kugwiritsa ntchito zingwe zotumizira za Efaneti zomwe zilipo kale kuti zitumize deta ndi mphamvu zamagetsi panthawi imodzimodzi Miyezo yaposachedwa ndi mafotokozedwe, ndikusunga kugwirizana ndi machitidwe ndi ogwiritsa ntchito a Efaneti omwe alipo.IEEE
Muyezo wa 802.3af ndi mulingo watsopano wozikidwa pa POE yamagetsi amagetsi a Ethernet.Imawonjezeranso miyezo yofananira yoperekera mphamvu mwachindunji kudzera pa chingwe cha netiweki pamaziko a IEEE802.3.Ndiwowonjezera muyeso wa Ethernet womwe ulipo komanso mulingo woyamba wogawa mphamvu padziko lonse lapansi.muyezo.
IEEE idayamba kupanga mulingo mu 1999, ndipo mavenda oyambilira omwe adatenga nawo gawo anali 3Com, Intel, PowerDsine, Nortel, Mitel, ndi National Semiconductor.Komabe, zofooka za muyezo uwu zakhala zikulepheretsa kukula kwa msika.Mpaka June 2003, IEEE idavomereza muyeso wa 802.3af, womwe umalongosola momveka bwino zovuta zowunikira ndi kuwongolera mphamvu mumayendedwe akutali, ndikulumikiza ma routers, masiwichi, ndi ma hubs ku mafoni a IP, machitidwe otetezera, ndi malo olowera opanda zingwe a LAN kudzera pazingwe za Efaneti.Njira yamagetsi yamagetsi imayendetsedwa.Kukula kwa IEEE802.3af kumaphatikizapo kuyesetsa kwa akatswiri ambiri amakampani, zomwe zimalolanso kuti muyezo uyesedwe m'mbali zonse.
