Lub network siv kho qhov muag yog siv lub teeb ua qhov nruab nrab kis mus rau txhua lub tsev. Ib qho kev siv kho qhov muag pom feem ntau muaj peb ntu ntawm cov kab hluav taws xob kho qhov muag OLT, chav kho qhov muag pom ONU, thiab qhov muag pom kev sib faib network ODN. OLT thiab ONU yog tus yuam sij rau optical nkag network.
OLT yog dab tsi
Lub npe tag nrho ntawm OLT yog Optical Line Terminal, tseem hu ua optical line termination, ua raws li qhov kawg ntawm cov khoom siv kho qhov muag nyob rau hauv passive optical network (PON).OLT, lub hauv paus chaw ua hauj lwm cov cuab yeej ntawm kev sib txuas lus yog siv los txuas optical fiber qaum. Nws ua haujlwm li hloov lossis router hauv kev sib txuas lus ib txwm muaj. Hauv cov ntsiab lus yooj yim, Nws muaj ob qhov kev taw qhia ntab ntws ntws (tau txais kev faib cov ntaub ntawv sib txawv thiab lub suab tsheb khiav los ntawm cov neeg siv) thiab qis qis (tau txais cov ntaub ntawv, suab thiab video tsheb los ntawm metro network lossis los ntawm lub network ntev thiab xa mus rau tag nrho ONT modules ntawm ODN.
ONU yog dab tsi
ONU yog Optical Network Unit uas hloov cov teeb liab kho qhov muag kis ntawm fiber ntau rau cov teeb liab hluav taws xob. ONU tuaj yeem xa, sib sau thiab tu cov ntaub ntawv sib txawv los ntawm tus neeg siv khoom thiab xa nws mus rau OLT. Grooming yog txheej txheem uas optimizes thiab reorganizes cov ntaub ntawv kwj ces nws yuav xa tau zoo dua. Kev xa tawm sib txawv ntawm ONUs hauv FTTx networks muaj ntau txoj hauv kev nkag mus. Piv txwv li, FTTC (fibre To The Curb) ONU tau muab tso rau hauv chav tsev computer hauv nruab nrab ntawm cov zej zog; FTTB (fibre To The Building) ONU muab tso rau hauv lub thawv fiber ntau ntawm txoj kev hauv tsev; FTTH (fibre To The Home) ONU muab tso rau hauv cov neeg siv hauv tsev.
ONT yog dab tsi
ONT yog Optical Network Terminal, tus neeg siv sab nraud ntawm FTTH, feem ntau hu ua "optical modem", zoo ib yam li xDSL hluav taws xob modem. ONT yog lub davhlau ya nyob twg kho qhov muag thiab siv rau cov neeg siv kawg thaum ONU hais txog chav tsev kho qhov muag. Tej zaum yuav muaj lwm cov tes hauj lwm ntawm nws thiab cov neeg siv kawg. ONT yog ib feem tseem ceeb ntawm ONU.
Qhov kev sib raug zoo ntawm ONU thiab OLT yog dab tsi
OLT yog qhov kawg tswj, thiab ONU yog lub davhlau ya nyob twg; ONU kev pabcuam yog xa los ntawm OLT, thiab ob qho kev sib raug zoo ntawm tus tswv-tus tswv cuab. Ntau ONUs tuaj yeem ua tswv cuab ntawm kev sib cais raws li OLT.
ODN yog dab tsi
ODN yog Optical Distribution Network, uas yog lub cev channel ntawm optical kis tau tus mob ntawm Optical Line Terminal thiab ONU. Lub luag haujlwm tseem ceeb yog ua kom tiav bidirectional kis tau tus mob ntawm optical signals. Feem ntau cov no txuas nrog fiber ntau optic cables, optical connectors, optical splitters, thiab optical tis ncej.