IUkutshintsha kwePoEyitshintshaexhasa unikezelo lwamandla kwintambo yenethiwekhi. Xa kuthelekiswa neqhelekileyotshintsha, i-terminal yokufumana amandla (efana ne-AP, ikhamera yedijithali, njl.) ayifuni 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 ehleliweyo, 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 ka-2003, i-IEEE yavuma umgangatho we-802.3af, ochaza ngokucacileyo ukufunyanwa kwamandla kunye nemiba yokulawula kwinkqubo ekude, kwaye idibanisa.iirotha, utshintsho, kunye nee-hubs kwiifowuni ze-IP, iinkqubo zokhuseleko, kunye neendawo zokufikelela kwi-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.
