Indlela yokwahlula inethiwekhi yokufikelela kwi-OLT, i-ONU, i-ODN, i-ONT?

Uthungelwano lwe-optical access luthungelwano lofikelelo olusebenzisa ukukhanya njengendlela yothumelo, endaweni yeengcingo zobhedu, kwaye lusetyenziselwa ukufikelela kwikhaya ngalinye.Inethiwekhi yokufikelela kumbono.Uthungelwano lofikelelo lwe-Optical ngokubanzi lunamacandelo amathathu: i-terminal ye-optical line ye-OLT, iyunithi yenethiwekhi ye-optical i-ONU, inethiwekhi yokusasaza i-ODN, phakathi kwayo i-OLT kunye ne-ONU ngamacandelo angundoqo othungelwano lofikelelo lwamehlo.

Yintoni i-OLT?

Igama elipheleleyo le-OLT yi-Optical Line Terminal, i-terminal ye-optical line.I-OLT yi-terminal ye-optical line kunye nesixhobo se-ofisi esisembindini sonxibelelwano ngefowuni.Isetyenziselwa ukudibanisa imigca ye-optical fiber trunk.Isebenza njengokutshintsha okanye umzila kuthungelwano lonxibelelwano lwemveli.Sisixhobo ekungeneni kwenethiwekhi yangaphandle kunye nokungena kwenethiwekhi yangaphakathi.Ibekwe kwi-ofisi esembindini, eyona misebenzi ibalulekileyo yesigqeba kukucwangciswa kwetrafikhi, ulawulo lwe-buffer, kunye nokubonelela ngojongano lwenethiwekhi ye-passive optical network kunye nolwabiwo lwe-bandwidth.Ukuyibeka ngokulula, kukuphumeza imisebenzi emibini.Ukufikelela phezulu, igqibezela ukufikelela phezulu kwenethiwekhi yePON;kwi-downstream, idatha efunyenweyo ithunyelwa kwaye isasazwe kuzo zonke izixhobo ze-terminal ye-ONU ngokusebenzisa inethiwekhi ye-ODN.

Yintoni i-ONU?

I-ONU yiYunithi yeNethiwekhi yeOptical.I-ONU inemisebenzi emibini: ikhetha ngokukhetha usasazo oluthunyelwe yi-OLT, kwaye iphendule kwi-OLT ukuba idatha idinga ukufunyanwa;iqokelela kwaye ikhusele idatha ye-Ethernet ekufuneka umsebenzisi ayithumele, kwaye ayithumele kwi-OLT ngokwefestile yokuthumela eyabelwe Thumela idatha egcinwe kwi-cached.

Kwinethiwekhi ye-FTTx, iindlela ezahlukeneyo zokufikelela kwi-ONU zokusasazwa nazo ziyahluka, njenge-FTTC (iFiber ukuya kwiCurb): I-ONU ibekwe kwigumbi eliphakathi lekhompyutha yoluntu;I-FTTB (IFayibha ukuya kwiSakhiwo): I-ONU ibekwe kwipaseji ye-FTTH (IFayibha ukuya eKhaya): I-ONU ibekwe kumsebenzisi wasekhaya.

Yintoni i-ONT?

I-ONT yi-Optical Network Terminal, eyona yunithi yesiphelo ye-FTTH, eyaziwa ngokuba yi-"optical modem", efana nemodem yombane ye-xDSL.I-ONT yi-terminal ye-optical network, esetyenziswa kumsebenzisi wokugqibela, ngelixa i-ONU ibhekisela kwiyunithi yenethiwekhi ye-optical, kwaye kunokubakho ezinye iinethiwekhi phakathi kwayo kunye nomsebenzisi wokugqibela.I-ONT yinxalenye ye-ONU.

Yintoni ubudlelwane phakathi kwe-ONU kunye ne-OLT?

I-OLT yi-terminal yolawulo, kwaye i-ONU yi-terminal;ukusebenza kwenkonzo ye-ONU kukhutshwa nge-OLT, kwaye bobabini bakubudlelwane bobukhoboka.Ii-ONU ezininzi zinokudityaniswa kwiOLT enye ngesahlukanisi.

Yintoni iODN?

I-ODN yiNethiwekhi ye-Optical Distribution Network, inethiwekhi yokusabalalisa i-optical, i-optical transmission ishaneli yomzimba phakathi kwe-OLT kunye ne-ONU, umsebenzi oyintloko kukugqiba ukuhanjiswa kweendlela ezimbini zeempawu ze-optical, ngokuqhelekileyo ngeentambo ze-fiber optical, i-optical connectors, i-optical splitters kunye nofakelo. qhagamshela ezi Inxalenye yezixhobo ezixhasayo zesixhobo, eyona nto ibalulekileyo yi-splitter ye-optical.