IShintshanisa amasheya PoEyin ashintshaesekela ukunikezwa kwamandla kukhebuli yenethiwekhi. Uma kuqhathaniswa nokujwayelekileshintsha, itheminali eyamukela amandla (efana ne-AP, ikhamera yedijithali, njll.) ayidingi ukuxhunywa ngentambo ukuze kunikezwe amandla, futhi ukwethembeka kwayo yonke inethiwekhi kuphakeme.
Ukubuka konke kwe-Power Over Ethernet (POE) POE (Power Over Ethernet) ibhekisela ekusetshenzisweni kwamatheminali asekelwe ku-IP (njengezingcingo ze-IP, izindawo zokungena ezingenantambo ze-LAN (ama-AP, amakhamera enethiwekhi, njll.) ingahlinzeka ngobuchwepheshe bokuphakela amandla e-DC kulabo abanjalo. amadivaysi ngenkathi idlulisela amasignali edatha Ubuchwepheshe be-POE bungaqinisekisa ukusebenza okuvamile kwenethiwekhi ekhona kuyilapho kuqinisekisa ukuphepha kwekhebula ekhona ehleliwe, ukunciphisa izindleko.
I-POE yaziwa nangokuthi isistimu yokuphakela amandla esekelwe kunethiwekhi yendawo (POL, Power over LAN) noma i-Active Ethernet (Active Ethernet), ngezinye izikhathi ebizwa nangokuthi Amandla phezu kwe-Ethernet ngamafuphi. Lokhu ukusetshenziswa kwezintambo zokudlulisa ze-Ethernet ezijwayelekile ezikhona ukudlulisa idatha namandla kagesi ngesikhathi esifanayo Amazinga akamuva kanye nokucaciswa, nokugcina ukuhambisana nezinhlelo ezikhona ze-Ethernet nabasebenzisi. IEEE
Izinga le-802.3af liyindinganiso entsha esekelwe ku-POE yesistimu yokuphakelwa kwamandla ye-Ethernet. Yengeza amazinga ahlobene okunikezwa kwamandla aqondile ngentambo yenethiwekhi ngesisekelo se-IEEE802.3. Kuyisandiso sezinga elikhona le-Ethernet kanye nezinga lokuqala lokusatshalaliswa kwamandla ngamazwe ngamazwe. ejwayelekile.
I-IEEE yaqala ukuthuthukisa izinga ngo-1999, futhi abathengisi bokuqala ababebambe iqhaza kwakuyi-3Com, Intel, PowerDsine, Nortel, Mitel, kanye ne-National Semiconductor. Kodwa-ke, ukushiyeka kwaleli zinga bekukhawulela ukwanda kwemakethe. Kuze kube nguJuni 2003, i-IEEE igunyaze izinga le-802.3af, elicacisa ngokucacile ukutholwa kwamandla nokulawula izinkinga kusistimu yesilawuli kude, futhi ixhumeke.imizila, amaswishi, namahabhu kumafoni we-IP, amasistimu okuvikela, namaphoyinti okufinyelela e-LAN engenantambo ngamakhebula e-Ethernet. Imodi yokuphakelwa kwamandla kwemishini ilawulwa. Ukuthuthukiswa kwe-IEEE802.3af kufaka phakathi imizamo yochwepheshe abaningi benkampani, okuvumela futhi izinga ukuthi lihlolwe kuzo zonke izici.
