Njengamanje, mayelana nobuchwepheshe benethiwekhi yokufinyelela kwe-fiber optical, ukufinyelela kwe-narrowband kancane kancane kuthathelwa indawo ukufinyelela kwe-broadband, futhi ekugcineni i-fiber home iyafinyelelwa. I-broadband optical fiber yenethiwekhi yokufinyelela iba yinto engenakugwenywa, futhi ubuchwepheshe be-PON buzoba indawo yobuchwepheshe yenethiwekhi yokufinyelela e-broadband esikhathini esizayo ngenxa yezinsizakalo zayo eziningi, ukutshalwa kwezimali okuphansi kanye nokugcinwa okulula.
Iyini inethiwekhi yokufinyelela ifayibha?
Inethiwekhi yokufinyelela i-fiber optical ibhekisela kunethiwekhi yokufinyelela lapho i-transmission medium iyi-optical fiber. Amanethiwekhi okufinyelela i-Optical fibre angahlukaniswa ngokobuchwepheshe abe izigaba ezimbili: amanethiwekhi okukhanya asebenzayo (AON, Active Optical Network) kanye namanethiwekhi optical passive (PON, Passive Optical Network).
Inethiwekhi ye-optical esebenzayo ingahlukaniswa ibe yi-AON ngokusekelwe ku-SDH ne-AON ngokusekelwe ku-PDH;
Amanethiwekhi okusebenza angabonakali angahlukaniswa abe i-PON ye-narrowband kanye ne-Broadband PON.
Iyiphi indima edlalwa yinethiwekhi yokufinyelela ekwakhiweni kwenethiwekhi?
Inethiwekhi yolwazi yakhiwe inethiwekhi yomgogodla oyinhloko, inethiwekhi yendawo yedolobha elikhulu, inethiwekhi yokufinyelela, kanye nenethiwekhi yezakhiwo zamakhasimende. Inethiwekhi yokufinyelela isebhulohweni lenethiwekhi yendawo yedolobha elikhulu / inethiwekhi yomgogodla.
Njengamanje, isayensi nobuchwepheshe buthuthuka ngokugxumagxuma, futhi inani elikhulu lamafayela e-elekthronikhi akhiqizwa njalo. Ngokuhwebelana kwembulunga yonke kwezomnotho kanye nokusheshisa kokwaziswa komphakathi, i-inthanethi iye yaduma kakhulu, izinsizakalo zedatha zikhule ngobudlova, futhi izinhlobo zezinsizakalo zokuxhumana ziqhubekile nokukhula. Uhlobo lwebhizinisi. Inethiwekhi yokufinyelela ye-narrowband isiphenduke ibhodlela elikhawulela ukuthuthukiswa kwenethiwekhi ku-broadband. Imakethe yenethiwekhi yokufinyelela inomthamo omkhulu, futhi ubuchwepheshe obusha buvela njalo ukuhlangabezana nezidingo zabasebenzisi. Inethiwekhi yokufinyelela iyona okugxilwe kuyo nokhiye ekuthuthukisweni kwengqalasizinda yolwazi kazwelonke. Ubuchwepheshe bokufinyelela kunethiwekhi sebuphenduke indawo okugxilwe kuyo kanye nokutshalwa kwezimali kwezikhungo zocwaningo, abathengisi bezokuxhumana, izinkampani zezokuxhumana kanye neminyango esebenzayo.
Izinzuzo ze-PON
1. Ingahlinzeka ngama-broadband asobala namandla okudlulisa angabizi kakhulu.
2. Uma kuqhathaniswa nenethiwekhi ye-optical esebenzayo, ukufakwa kwayo, ukuthunywa nokugcinwa kwezindleko zokusebenza ziphansi, futhi uhlelo lunokwethenjelwa futhi luzinzile, ngakho-ke inethiwekhi yokufinyelela isebenzisa inombolo enkulu yezinhlelo ze-PON.
3. Ngenxa yokuthi i-PON isebenzisa imodi yokufinyelela ye-point-to-multipoint, izindleko zengqalasizinda zokubeka i-fiber optical phakathi kwehhovisi elimaphakathi nabasebenzisi zithwalwa abasebenzisi, okungakhuphula imbuyiselo ekutshalweni kwezimali ekwakhiweni kwenethiwekhi. Uma kuqhathaniswa nendlela yokumisa i-fiber optical ephuma ekupheleni komsebenzisi ngamunye, umthamo wemishini ye-PON ethuthukisa izinsizakalo enanini elifanayo lamakhasimende incane futhi ithatha indawo encane ehhovisi eliphakathi.
4. I-PON isekela kokubili izinsizakalo zendabuko (isevisi yocingo evamile ye-POTS, i-analog TV) kanye nezinsizakalo ze-broadband (ukudluliswa kwezwi le-IP, i-IPTV, ukufinyelela kwe-inthanethi ye-broadband, njll.).
I-5.PON isekela bonke abasebenzisi bezindawo zokuhlala (besebenzisa i-POTS, i-analog TV kanye nezinsizakalo zedatha) kanye nabasebenzisi abaningi bezentengiselwano (abasebenzisa izinsiza ze-T1 / E1 ne-Ethernet) ukwabelana ngenethiwekhi yokufinyelela (okuhlanganisa ungqimba olubonakalayo kanye nongqimba lwephrothokholi) ngaphandle kokusebenzisa ukufinyelela okuhlukile. Ukufinyelela kunethiwekhi kubahlinzeka ngamasevisi, ngaleyo ndlela kunciphisa inani lamanethiwekhi okufinyelela ahlakazekile.