Ngokuthandwa okwandayo kwefoni ye-IP, ukuqapha ividiyo yenethiwekhi kanye nemishini ye-Ethernet engenantambo kunethiwekhi, imfuneko yokuhlinzeka ngosekelo lwamandla nge-Ethernet ngokwayo iya ngokuya iphuthuma. Ezimweni eziningi, okokusebenza kwetheminali kudinga ukuhlinzekwa kwamandla kagesi e-DC, kanti okokusebenza kwetheminali kuvame ukufakwa ophahleni noma phezulu ngaphandle ukusuka phansi. Kunzima ukuba nesokhethi yamandla efanelekile eduze. Noma ngabe kunesokhethi, isiguquli se-AC/DC esidingwa umshini wokugcina kunzima ukusibeka. Ngaphezu kwalokho, ezinhlelweni eziningi ze-LAN ezinkulu, abalawuli badinga ukuphatha amadivaysi amaningi etheminali ngesikhathi esisodwa. Lawa madivayisi adinga ukunikezwa kwamandla okuhlanganisiwe nokuphathwa okuhlangene. Ngenxa yomkhawulo wendawo yokuphakelwa kukagesi, kuletha ukuphazamiseka okukhulu ekuphathweni kokuphakelwa kukagesi. I-Ethernet power supply Poe ixazulula le nkinga.

I-Poe ubuchwepheshe bokuphakela amandla we-Ethernet enentambo. Intambo yenethiwekhi esetshenziselwa ukudluliswa kwedatha inamandla okunikezwa kwamandla kagesi e-DC ngesikhathi esifanayo, engaxazulula ngempumelelo ukunikezwa kwamandla okumaphakathi kwamatheminali afana nefoni ye-IP, i-wireless AP, ishaja yedivayisi ephathekayo, isifundi sekhadi, ukutholwa kwekhamera nedatha. Ukunikezwa kwamandla ka-Poe kunezinzuzo zokuthembeka, ukuxhumana okulula nezinga elihlanganisiwe:

Okunokwethenjelwa: idivayisi ye-Poe inganikeza amandla kumadivayisi amaningi etheminali ngesikhathi esisodwa, ukuze kubonakale ukunikezwa kwamandla okumaphakathi kanye nokwenza isipele samandla ngesikhathi esisodwa. Uxhumano olulula: imishini yokugcina ayidingi ukunikezwa kwamandla kwangaphandle, kodwa intambo yenethiwekhi eyodwa kuphela. Okujwayelekile: thobelana nezindinganiso zamazwe ngamazwe futhi usebenzise isixhumi esibonakalayo samandla e-RJ45 esihlanganiswe emhlabeni wonke ukuze uqinisekise ukuxhunywa kwezinto zokusebenza ezivela kubakhiqizi abahlukene.