Optical access network yog ib qho kev nkag mus siv lub teeb uas siv lub teeb raws li qhov nruab nrab kis tau tus mob, es tsis txhob siv tooj liab xov hlau, thiab siv los nkag rau txhua tsev neeg.Optical access network.Optical access network feem ntau muaj peb ntu: optical kab davhlau ya nyob twg OLT, kho qhov muag network unit ONU, kho qhov muag faib network ODN, ntawm cov OLT thiab ONU yog cov tseem ceeb ntawm cov khoom siv kho qhov muag.
OLT yog dab tsi?
Lub npe tag nrho ntawm OLT yog Optical Line Terminal, kho qhov muag kab davhlau ya nyob twg.OLT yog qhov chaw nres tsheb kho qhov muag thiab cov khoom siv hauv chaw ua haujlwm hauv kev sib txuas lus.Nws yog siv los txuas optical fiber trunk kab.Nws ua haujlwm li hloov lossis router hauv kev sib txuas lus ib txwm siv.Nws yog ib qho cuab yeej ntawm qhov nkag ntawm lub network sab nraud thiab qhov nkag ntawm lub network sab hauv.Muab tso rau hauv lub chaw ua haujlwm hauv nruab nrab, cov haujlwm tseem ceeb tshaj plaws yog kev teem caij tsheb, kev tswj tsis tau, thiab kev muab cov neeg siv-oriented passive optical network interfaces thiab kev faib bandwidth.Txhawm rau muab nws yooj yim, nws yog ua tiav ob txoj haujlwm.Rau cov dej ntws, nws ua tiav cov dej ntws nkag ntawm PON network;rau qhov qis qis, cov ntaub ntawv tau txais raug xa mus thiab muab faib rau txhua tus neeg siv ONU cov khoom siv davhlau ya nyob twg los ntawm ODN network.
ONU yog dab tsi?
ONU yog Optical Network Unit.ONU muaj ob txoj haujlwm: nws xaiv tau txais kev tshaj tawm xa los ntawm OLT, thiab teb rau OLT yog tias cov ntaub ntawv xav tau;sau thiab buffers Ethernet cov ntaub ntawv uas tus neeg siv yuav tsum tau xa, thiab xa mus rau OLT raws li lub qhov rais xa xa cov ntaub ntawv cached.
Hauv FTTx network, qhov sib txawv ntawm kev xa tawm ONU kev nkag mus kuj sib txawv, xws li FTTC (Fiber To The Curb): ONU muab tso rau hauv nruab nrab lub computer chav hauv zej zog;FTTB (Fiber Rau Lub Tsev): ONU muab tso rau hauv txoj kev FTTH (Fiber To The Home): ONU muab tso rau hauv cov neeg siv hauv tsev.
ONT yog dab tsi?
ONT yog Optical Network Terminal, feem ntau lub davhlau ya nyob twg ntawm FTTH, feem ntau hu ua "optical modem", uas zoo ib yam li hluav taws xob modem ntawm xDSL.ONT yog lub davhlau ya nyob twg kho qhov muag, uas yog siv rau cov neeg siv kawg, thaum ONU hais txog chav kho qhov muag, thiab tej zaum yuav muaj lwm cov tes hauj lwm ntawm nws thiab cov neeg siv kawg.ONT yog ib feem tseem ceeb ntawm ONU.
Kev sib raug zoo ntawm ONU thiab OLT yog dab tsi?
OLT yog lub davhlau ya nyob twg tswj, thiab ONU yog lub davhlau ya nyob twg;Qhov kev pabcuam ua haujlwm ntawm ONU yog muab los ntawm OLT, thiab ob qho tib si nyob rau hauv kev sib raug zoo ntawm tus tswv- qhev.Ntau ONUs tuaj yeem txuas rau ib qho OLT los ntawm kev sib cais.
ODN yog dab tsi?
ODN yog Optical Distribution Network, optical tis network, yog optical kis tau tus mob lub cev channel ntawm OLT thiab ONU, lub luag haujlwm tseem ceeb yog ua kom tiav ob txoj kev sib kis ntawm cov teeb liab kho qhov muag, feem ntau yog los ntawm fiber ntau optical cables, optical connectors, optical splitters thiab installation rau txuas cov no Cov khoom siv ntawm cov cuab yeej txhawb nqa, cov khoom tseem ceeb tshaj plaws yog lub optical splitter.
Post lub sij hawm: Oct-15-2021