IUkutshintsha kwePoElutshintsho oluxhasa unikezelo lwamandla kwintambo yenethiwekhi.Xa kuthelekiswa nokutshintsha okuqhelekileyo, i-terminal yokufumana amandla (efana ne-AP, ikhamera yedijithali, njl.) Akufuneki ukuba ifakwe kwintambo yombane, kwaye ukuthembeka kwenethiwekhi yonke kuphezulu.
Isishwankathelo saMandla phezu kwe-Ethernet (POE) POE (Power Over Ethernet) ibhekisela ekusebenziseni i-IP-based terminals (ezifana neefowuni ze-IP, iindawo zokufikelela kwi-wireless LAN (APs, iikhamera zenethiwekhi, njl. izixhobo ngelixa uhambisa iimpawu zedatha Iteknoloji ye-POE inokuqinisekisa ukusebenza okuqhelekileyo kwenethiwekhi ekhoyo ngelixa iqinisekisa ukhuseleko lwe-cabling ekhoyo ekhoyo, ukunciphisa iindleko.
I-POE ikwabizwa ngokuba yinkqubo yonikezelo lwamandla esekelwe kwinethiwekhi yendawo yendawo (i-POL, Amandla phezu kwe-LAN) okanye i-Active Ethernet (i-Active Ethernet), ngamanye amaxesha ikwabizwa ngokuba yi-Power over Ethernet ngokufutshane.Oku kukusetyenziswa kweentambo eziqhelekileyo zokuhanjiswa kwe-Ethernet ukuhambisa idatha kunye namandla ombane ngexesha elifanayo Imigangatho yamva nje kunye neenkcukacha, kunye nokugcina ukuhambelana neenkqubo ze-Ethernet ezikhoyo kunye nabasebenzisi.IEEE
Umgangatho we-802.3af ngumgangatho omtsha osekelwe kwi-POE yenkqubo yokubonelela ngombane ye-Ethernet.Yongeza imigangatho enxulumeneyo yonikezelo lwamandla ngokuthe ngqo ngentambo yenethiwekhi ngokwesiseko se-IEEE802.3.Kukwandiswa komgangatho okhoyo we-Ethernet kunye nomgangatho wokuqala wokuhambisa amandla kumazwe ngamazwe.umgangatho.
I-IEEE yaqala ukuphuhlisa umgangatho ngo-1999, kwaye abathengisi bokuqala abathatha inxaxheba yayiyi-3Com, Intel, PowerDsine, Nortel, Mitel, kunye ne-National Semiconductor.Nangona kunjalo, iintsilelo zalo mgangatho zithintele ukwanda kwemarike.Kuze kube nguJuni 2003, i-IEEE ivume umgangatho we-802.3af, echaza ngokucacileyo ukufunyanwa kwamandla kunye nemiba yokulawula kwindlela ekude, kwaye idibanisa ii-routers, switch, kunye ne-hubs kwiifowuni ze-IP, iinkqubo zokhuseleko, kunye neendawo zokufikelela ze-LAN ezingenazintambo ngeentambo ze-Ethernet.Imowudi yokubonelela ngombane yesixhobo ilawulwa.Uphuhliso lwe-IEEE802.3af lubandakanya iinzame zeengcali ezininzi zeenkampani, ezivumela ukuba umgangatho uvavanywe kuzo zonke iinkalo.
