Yini i-AON?
I-AON iyinethiwekhi ye-optical esebenzayo, ikakhulukazi yamukela ukwakhiwa kwenethiwekhi ye-point-to-point (PTP), futhi umsebenzisi ngamunye angaba nomugqa we-fiber optical ozinikele.Inethiwekhi yokubona esebenzayo isho ukuthunyelwa kwama-router, ama-switching aggregator, okokusebenza okubonakalayo okusebenzayo nezinye izinto zokusebenza ezishintshayo phakathi kwemishini yehhovisi elimaphakathi namayunithi okusabalalisa abasebenzisi ngesikhathi sokudlulisa isignali.Lawa ma-switchgears aqhutshwa ugesi ukuze alawule ukusatshalaliswa kwamasignali kanye namasignali esiqondiso kumakhasimende athile.Imishini yokubona esebenzayo ihlanganisa umthombo wokukhanya (i-laser), isitholi sokubonwayo, imojula ye-transceiver optical, i-optical amplifier (i-fiber amplifier kanye ne-semiconductor optical amplifier).
Yini i-PON?
I-PON iyinethiwekhi ye-Passive Optical, isakhiwo senethiwekhi ye-point-to-multipoint, futhi iwubuchwepheshe obuyinhloko be-FTTB/FTTH.Inethiwekhi ye-Passive optical ibhekisela ku-ODN (inethiwekhi yokusabalalisa optical) isebenzisa kuphela imicu yokubona kanye nezingxenye ze-passive, futhi idinga kuphela ukusebenzisa okokusebenza okubukhoma emthonjeni wesiginali kanye nesiphetho sokwamukela isignali.Kusistimu ye-PON evamile, i-optical splitter iwumgogodla, futhi i-optical splitter isetshenziselwa ukuhlukanisa nokuqoqa amasignali okubona adluliselwa ngenethiwekhi.Lezi zihlukanisi ze-PON ziqondiswa kabili.Esiqondisweni esisezansi nomfula, izinsiza eziningi ezifana nedatha ye-IP, izwi, nevidiyo zisakazwa yi-OLT etholakala ehhovisi elimaphakathi kumodi yokusakaza nge-1:N passive optical splitter ku-ODN Kuwo wonke amayunithi e-ONU ku-PON;endaweni ekhuphuka nomfula, ulwazi lwesevisi oluningi olusuka ku-ONU ngayinye luhlanganiswe nefayibha ye-optical efanayo nge-1:N isihlanganisi se-passive optical ku-ODN ngaphandle kokuphazamisana, futhi ekugcineni ithunyelwe ku-OLT ehhovisi elimaphakathi ukuze ifike ekugcineni.
Inethiwekhi ye-passive optical ihlanganisa itheminali yomugqa wokubona (OLT) efakwe esiteshini sokulawula esimaphakathi, kanye neqembu lamayunithi enethiwekhi yokubona (ONUs) afakwe kusayithi lomsebenzisi.Inethiwekhi yokusabalalisa okubonakalayo (i-ODN) phakathi kwe-OLT ne-ONU iqukethe ama-optical fibre kanye nezihlukanisi noma ama-couplers.I-PON ihlukaniswe ngezindinganiso ezintathu zobuchwepheshe: i-APON esekelwe ku-ATM (ATM PON), i-Ethernet-based EPON (Ethernet PON), ne-GPON (Gigabit PON) esekelwe ku-General Frame Protocol.
Kunethiwekhi ye-AON, umsebenzisi unomugqa we-fiber optical ozinikezele, okulula ukugcinwa kwenethiwekhi kamuva, ukwandiswa kwamandla, ukuthuthukiswa kwenethiwekhi, njll. Ngaphezu kwalokho, inethiwekhi ye-AON ihlanganisa ububanzi obungaba amakhilomitha angu-100;inethiwekhi ye-PON ivamise ukukhawulelwa kuzintambo ze-fiber optic ezifika kumakhilomitha angama-20.I-AON iqondisa ngokuyinhloko amasignali okubona ngamadivayisi asebenzayo, futhi i-PON isebenzisa izisetshenziswa ezingenakho ukuhlinzekwa kwamandla, okuholela ezindlekweni eziphakeme zokuthunyelwa kwenethiwekhi ye-AON kune-PON.