Lub network nkag mus rau qhov muag pom yog lub network nkag mus uas siv lub teeb ua lub nruab nrab xa xov, es tsis txhob siv cov xov tooj liab, thiab siv los nkag mus rau txhua lub tsev neeg. Lub network nkag mus rau qhov muag pom. Lub network nkag mus rau qhov muag feem ntau muaj peb ntu: lub davhlau ya nyob twg kab optical OLT, lub network network unit ONU, lub network faib khoom optical ODN, ntawm cov OLT thiab ONU yog cov khoom tseem ceeb ntawm lub network nkag mus rau qhov muag.
OLT yog dab tsi?
Lub npe tag nrho ntawm OLT yog Optical Line Terminal, optical line terminal. OLT yog lub optical line terminal thiab yog ib qho khoom siv hauv chaw ua haujlwm hauv kev sib txuas lus. Nws yog siv los txuas cov kab fiber ntau optical. Nws ua haujlwm ua lub hloov lossis router hauv lub network sib txuas lus ib txwm muaj. Nws yog ib lub cuab yeej ntawm qhov nkag ntawm lub network sab nraud thiab qhov nkag ntawm lub network sab hauv. Muab tso rau ntawm lub chaw ua haujlwm hauv chaw ua haujlwm, cov haujlwm tseem ceeb tshaj plaws yog kev teem sijhawm tsheb khiav, kev tswj hwm buffer, thiab kev muab cov neeg siv-taw qhia passive optical network interfaces thiab kev faib bandwidth. Hais yooj yim, nws yog ua tiav ob txoj haujlwm. Rau upstream, nws ua tiav kev nkag mus rau upstream ntawm PON network; rau downstream, cov ntaub ntawv tau txais raug xa thiab faib rau txhua lub ONU neeg siv khoom siv los ntawm ODN network.
ONU yog dab tsi?
ONU yog Optical Network Unit. Lub ONU muaj ob lub luag haujlwm: nws xaiv tau txais cov kev tshaj tawm uas OLT xa, thiab teb rau OLT yog tias xav tau cov ntaub ntawv; sau thiab buffers cov ntaub ntawv Ethernet uas tus neeg siv xav tau xa, thiab xa mus rau OLT raws li lub qhov rai xa khoom xa tuaj. Xa cov ntaub ntawv cached.
Hauv FTTx network, ntau txoj kev xa tawm ONU nkag mus kuj txawv, xws li FTTC (Fiber To The Curb): ONU muab tso rau hauv chav computer hauv nruab nrab ntawm lub zej zog; FTTB (Fiber To The Building): ONU muab tso rau hauv txoj kev hauv tsev FTTH (Fiber To The Home): ONU muab tso rau hauv tus neeg siv hauv tsev.
ONT yog dab tsi?
ONT yog Optical Network Terminal, qhov chaw kawg ntawm FTTH, feem ntau hu ua "optical modem", uas zoo ib yam li lub modem hluav taws xob ntawm xDSL. ONT yog lub chaw nres tsheb optical network, uas siv rau tus neeg siv kawg, thaum ONU hais txog lub chaw nres tsheb optical network, thiab tej zaum yuav muaj lwm lub network ntawm nws thiab tus neeg siv kawg. ONT yog ib feem tseem ceeb ntawm ONU.
Kev sib raug zoo ntawm ONU thiab OLT yog dab tsi?
Lub OLT yog lub davhlau ya nyob twg tswj hwm, thiab ONU yog lub davhlau ya nyob twg; qhov kev pabcuam qhib 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 nrog ib qho OLT los ntawm lub splitter.
ODN yog dab tsi?
ODN yog Optical Distribution Network, optical distribution network, yog qhov kev sib kis optical ntawm OLT thiab ONU, lub luag haujlwm tseem ceeb yog ua kom tiav ob txoj kev sib kis ntawm cov teeb liab optical, feem ntau yog los ntawm cov cables fiber optical, optical connectors, optical splitters thiab kev teeb tsa los txuas cov khoom no. Cov khoom siv ntawm cov khoom siv txhawb nqa, qhov tseem ceeb tshaj plaws yog optical splitter.
Lub sijhawm tshaj tawm: Lub Kaum Hli-15-2021