Yini i-AON?
I-AON iyinethiwekhi ye-optical esebenzayo, ngokuyinhloko yamukela ukwakhiwa kwenethiwekhi ye-point-to-point (PTP), futhi umsebenzisi ngamunye angaba nomugqa we-fiber optical ozinikele. Inethiwekhi ebonakalayo esebenzayo isho ukuthunyelwa kweimizila, ama-aggregator ashintshayo, okokusebenza okubonakalayo okusebenzayo nezinye izinto zokusebenza zokushintsha phakathi kwemishini yehhovisi emaphakathi namayunithi okusabalalisa abasebenzisi ngesikhathi sokudlulisa isignali. Lawa ma-switchgears aqhutshwa ugesi ukuze alawule ukusatshalaliswa kwamasignali kanye namasignali ezinkomba 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. Ngaphansi komfula, izinsiza eziningi ezifana nedatha ye-IP, izwi, nevidiyo zisatshalaliswa yi-OLTetholakala ehhovisi elimaphakathi kumodi yokusakaza nge-1:N ye-passive optical splitter ku-ODN Kubo bonkeI-ONUamayunithi ku-PON; ohlangothini olukhuphuka nomfula, ulwazi lwesevisi eminingi oluvela kumuntu ngamunyeI-ONUihlanganiswe nefayibha ye-optical efanayo ngokusebenzisa i-1:N isihlanganisi se-passive optical ku-ODN ngaphandle kokuphazamisana, futhi ekugcineni ithunyelwe ku-OLTehhovisi elimaphakathi ukuze kuphele ukwamukela.
Inethiwekhi ye-passive optical ihlanganisa itheminali yomugqa obonakalayo (OLT) efakwe esiteshini sokulawula esimaphakathi, kanye neqembu lamayunithi enethiwekhi abonakalayo (Ama-ONU) efakwe endaweni yomsebenzisi. Inethiwekhi yokusabalalisa ebonakalayo (ODN) phakathi kwe-OLTkanye neI-ONUiqukethe imicu yokubona kanye nezihlukanisi ezingenzi lutho 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.