Inethiwekhi ye-optical access inethiwekhi yofikelelo esebenzisa ukukhanya njengendlela yokuhambisa, ithatha indawo yeengcingo zobhedu, kwaye isetyenziselwa ukufikelela kwikhaya ngalinye.Uthungelwano lwe-optical access ngokubanzi lunamacandelo amathathu: i-terminal ye-optical line OLT, i-optical network unit ONU, kunye ne-optical distribution network ODN, apho amacandelo angundoqo we-OLT kunye ne-ONU yokufikelela kwinethiwekhi yokubona.
Yintoni i-OLT?
Igama elipheleleyo le-OLT yi-Optical Line Terminal, i-terminal ye-optical line.I-OLT yitheminali ye-optical line, kwaye sisixhobo se-ofisi esisembindini sonxibelelwano ngefowuni.Isetyenziselwa ukudibanisa i-optical fiber trunks.Isebenza njengokutshintsha okanye umzila kuthungelwano lonxibelelwano lwemveli.Sisixhobo sokungena kwinethiwekhi yangaphandle kunye nokungena kunye nokuphuma kwenethiwekhi yangaphakathi.Ibekwe kwi-ofisi esembindini, eyona misebenzi ibalulekileyo yokwenziwa kukucwangciswa kwetrafikhi, ulawulo lwe-buffer, kunye nokubonelela ngojongano lwenethiwekhi ye-passive optical network kunye nokwabiwa kwe-bandwidth.Ngemigaqo elula, iphumeza imisebenzi emibini: phezulu, igqiba ukufikelela phezulu kwenethiwekhi yePON;kunye nezantsi, ithumela idatha efunyenweyo kuzo zonke izixhobo ze-terminal ye-ONU ngokusebenzisa inethiwekhi ye-ODN.
Yintoni i-ONU?
I-ONU yiYunithi yeNethiwekhi yokubona.I-ONU inemisebenzi emibini: Ukufumana ngokukhethiweyo usasazo oluthunyelwe yi-OLT, kwaye ufumane impendulo kwi-OLT ukuba idatha idinga ukufunyanwa;ukuqokelela kunye ne-cache idatha ye-Ethernet efunwa ngumsebenzisi ukuba ayithumele, kwaye uyithumele kwi-OLT ngokuhambelana nefestile yokuthumela eyabelwe Thumela idatha egciniweyo.
Iindlela zokuthunyelwa kwee-ONU kwiinethiwekhi ezahlukeneyo zeFTTx nazo zahlukile.Umzekelo, i-FTTC (iFayibha ukuya kwiCurb): I-ONU ibekwe kwigumbi lekhompyutha elisembindini loluntu;I-FTTB (IFayibha ukuya kwiSakhiwo): I-ONU ibekwe kwibhokisi yokuhlangana yepaseji;I-FTTH (IFayibha ukuya eKhaya): I-ONU ibekwe kubasebenzisi basekhaya.
Yintoni i-ONT?
I-ONT yi-Optical Network Terminal, eyona yunithi yesiphelo ye-FTTH, eyaziwa ngokuba yi-"optical cat", efana ne-xDSL electric cat.I-ONT yi-terminal yenethiwekhi ye-optical kwaye isetyenziselwa abasebenzisi bokuphela.I-ONU ibhekisa kwiyunithi yenethiwekhi yamehlo.Kusenokubakho ezinye iinethiwekhi phakathi kwayo kunye nomsebenzisi wokugqibela.I-ONT yinxalenye ye-ONU.
Yintoni ubudlelwane phakathi kwe-ONU kunye ne-OLT?
I-OLT sisiphelo solawulo, kwaye i-ONU yi-terminal;Unikezelo lwenkonzo ye-ONU lunikezelwa nge-OLT, kwaye bobabini bakubudlelwane bobukhoboka.Ii-ONU ezininzi zinokuxhonywa ngesahluli phantsi kweOLT.
Yintoni iODN?
I-ODN yiNethiwekhi ye-Optical Distribution Network, eyijelo elibonakalayo lokuhanjiswa kwe-optical phakathi kwe-OLT kunye ne-ONU.Umsebenzi oyintloko kukugqiba ukuhanjiswa kwe-bidirectional yezibonakaliso ze-optical.Ngokuqhelekileyo ezi ziqhagamshelwe ngeentambo zefiber optic, izihlanganisi zamehlo, izahlulo zamehlo, kunye nofakelo.Izixhobo ezixhasayo zesixhobo ziqulunqwe ngama-splitter optical.
