I-PON (Inethiwekhi ye-Passive Optical) iyinethiwekhi yokubona engenzi lutho, okusho ukuthi i-ODN (inethiwekhi yokusabalalisa optical) phakathiOLT(Optical line terminal) kanye ne-I-ONU(iyunithi yenethiwekhi ye-optical) ayinazo izinto ezisetshenziswayo ezisebenzayo, futhi isebenzisa kuphela imicu yokubona kanye nezingxenye ze-passive. I-PON ithatha ngokuyinhloko ukwakheka kwenethiwekhi ye-point-to-multipoint, okuwubuchwepheshe obuyinhloko bokubona i-FTTB/FTTH.
Ubuchwepheshe be-PON buqukethe izinto eziningi, futhi bubuyekezwa njalo. Ukuthuthukiswa kobuchwepheshe be-xPON kusuka ku-APON, BPON, kanye ne-GPON yakamuva ne-EPON. Lobu ubuchwepheshe bezindlela ezihlukene zokudlulisela kanye namazinga okudlulisela athuthukiswe ngezikhathi ezahlukene.
Yini i-EPON?
I-EPON (i-Ethernet Passive Optical Network) iyinethiwekhi ye-Ethernet passive optical network. I-EPON isuselwe kubuchwepheshe be-PON be-Ethernet, obuhlanganisa izinzuzo zobuchwepheshe be-PON nobuchwepheshe be-Ethernet. Yamukela ukwakheka kwe-point-to-multipoint kanye nokudluliswa kwe-fiber optical ye-passive ukuhlinzeka ngezinsizakalo eziningi phezu kwe-Ethernet. Ngenxa yokuthunyelwa komnotho nokusebenza kahle kwe-EPON, iyindlela yokuxhumana esebenza kahle kakhulu yokuthola "amanethiwekhi amathathu kwelinye" kanye "nemayela lokugcina".
Iyini i-GPON?
I-GPON (Gigabit-Capable Passive Optical Network) iyinethiwekhi ye-Gigabit passive optical noma inethiwekhi ye-Gigabit passive optical network. Amazinga atholwe yi-EPON kanye ne-GPON ahlukile. Kungashiwo ukuthi i-GPON ithuthuke kakhulu futhi ingadlulisela umkhawulokudonsa omningi, futhi ingaletha abasebenzisi abaningi kune-EPON. Nakuba i-GPON inezinzuzo ngaphezu kwe-EPON ngamanani aphezulu kanye nezinsizakalo eziningi, ubuchwepheshe be-GPON bunzima kakhulu futhi izindleko zabo ziphakeme kune-EPON. Ngakho-ke, okwamanje, i-EPON ne-GPON ubuchwepheshe obunezinhlelo zokusebenza eziningi zokufinyelela kwe-Broadband ye-PON. Yibuphi ubuchwepheshe obungakhethwa buncike kakhulu ezindlekweni zokufinyelela i-fiber optical kanye nezidingo zebhizinisi. I-GPON izofaneleka kakhulu kumakhasimende ane-bandwidth ephezulu, izinsizakalo eziningi, i-QoS nezidingo zokuphepha kanye nobuchwepheshe be-ATM njengomgogodla. Ukuthuthukiswa kwesikhathi esizayo kuwumkhawulokudonsa ophezulu. Isibonelo, ubuchwepheshe be-EPON/GPON buthuthukise i-10 G EPON/10 G GPON, futhi umkhawulokudonsa uzothuthukiswa nakakhulu.
Njengoba isidingo samandla abahlinzeki benethiwekhi siqhubeka nokwanda, ukuguquguquka kwamanethiwekhi okufinyelela kumele kunwetshwe ukuze kuhlangatshezwane nalesi sidingo esikhulayo. I-Fiber-to-the-home (FTTH) i-passive optical network (PON) ukufinyelela kwenethiwekhi ye-optical okwamanje iwubuchwepheshe obusetshenziswa kakhulu futhi obusetshenziswa kakhulu. Izinzuzo zobuchwepheshe be-PON ukuthi zinganciphisa ukusebenza kwezinsiza ze-backbone optical fiber futhi zilondoloze ukutshalwa kwezimali; isakhiwo senethiwekhi siyavumelana nezimo futhi ikhono lokunweba linamandla; izinga lokuhluleka kwemishini ye-passive optical liphansi, futhi akulula ukuphazanyiswa imvelo yangaphandle; futhi nekhono lokusekela ibhizinisi linamandla.