Fiber ntau rau hauv tsev, FTTH yog txoj kev sib kis ntawm kev sib kis fiber ntau. FTTH yog hais txog kev teeb tsa ntawm lub vev xaib hluav taws xob (ONU) ntawm cov neeg siv hauv tsev lossis cov neeg siv khoom lag luam. Nws yog lub khoos phis tawm kho qhov muag tau siv daim ntawv thov cov hom ze tshaj rau cov neeg siv tshwj FTTD (fiber ntau rau desktop).
Muaj ob txoj hauv kev tseem ceeb rau kev tsim FTTH: nquag kho qhov muag network thiab passive optical network.
Active optical network muaj cov yam ntxwv ntawm kev sib kis ntev ntev, tab sis cov khoom siv yog cov kws tshaj lij, tsis haum rau cov neeg siv khoom siv, thiab qhov chaw nres nkoj tus nqi yog tus siab. Tsis tas li ntawd, cov yam ntxwv nquag kuj ua rau cov cuab yeej teeb tsa muaj tsawg tsawg, thiab nws yog qhov yooj yim rau cuam tshuam los ntawm hluav taws xob cuam tshuam nyob ib puag ncig ib puag ncig, uas nce cov ntsiab lus txhaum ntawm lub network thiab ua rau cov nqi kho dua.
Passive optical network (PON) yog lub nruab nrab cov ntshiab network, uas muaj lub peev xwm ntawm ntuj los tiv thaiv electromagnetic cuam tshuam, txo cov ntsiab lus tsis ua tiav ntawm kev nkag network, thiab muaj lub siab kev cia siab thiab qis tus nqi. Nyob rau tib lub sijhawm, FTTH ntawm passive optical network hom muaj kev pom zoo muaj peev xwm, tuaj yeem txhawb nqa ntau yam kev siv, thiab zoo dua rau kev tsim kho loj ntawm cov neeg siv. Passive optical network tau maj mam dhau los ua lub ntsiab kev loj hlob ntawm FTTH.
Lub cev txheej txheem ntawm FTTH yog qhov kho qhov muag, thiab kev siv network kho qhov muag muab lub hauv paus zoo rau kev ua haujlwm siab bandwidth. Tab sis tsuas yog lub cev txheej tsis txaus, kom ua tiav cov ntaub ntawv xa mus, qhov tseem ceeb tshaj plaws yog kev tswj hwm ob-txheej. Yog li, txoj kev loj hlob ntawm FTTH tau ntsib ib qho kev hloov pauv ntawm ob-txheej network, ntawm ATM mus rau Ethernet, sib phim rau APON thiab E / GPON feem.
FTTH tsis tsuas yog muab cov kab kev sib txuas ntau dua, tab sis tseem txhim kho cov pob tshab ntawm cov ntaub ntawv cov qauv, nrawm, yoj thiab raws tu qauv, so cov kev xav tau ntawm ib puag ncig kev ua haujlwm thiab kev siv fais fab, thiab ua kom yooj yim rau kev saib xyuas thiab teeb tsa.
FTTH muaj tsib yam zoo
1. Nws yog lub network passive, uas tuaj yeem sau siab dhau los ntawm chaw ua haujlwm mus rau tus neeg siv;
2. Nws daim bandwidth tseem dav, thiab qhov kev ncua ntev tsuas yog nyob rau kab nrog daim ntawv thov ntawm cov txheej txheem ntawm tus neeg ua haujlwm loj;
3. Txij li nws yog ib qho kev pabcuam nqa ntawm cov fiber ntau, tsis muaj teebmeem;
4. Vim tias nws txoj kab ntsuas dav dav, nws txhawb nqa kev cai hloov tau dua tshiab;
5. Nrog rau kev txhim kho thev naus laus zis, ntau txoj haujlwm zoo dua qub tau tsim nrog suav nrog taw tes, 1.25g thiab FTTH.
Hauv tsev neeg kho qhov muag, muaj FTTB (fiber ntau rau lub tsev) fiber ntau rau lub tsev, FTTC (fiber ntau rau qhov chaw nres tsheb) fiber ntau rau ntawm ntug kev, fttsa (fiber ntau rau thaj chaw pabcuam) fiber ntau rau thaj chaw pabcuam, thiab lwm yam.
Txuas cov fiber ntau ncaj qha rau cov neeg siv' lub tsev tsis muaj kev txwv rau kev siv bandwidth, yoj hluav taws xob thiab tshuab thev naus laus zis. Nws yog qhov tsim nyog rau kev qhia ntau yam kev pabcuam tshiab. Nws yog qhov zoo tshaj plaws kev pab cuam pob tshab network thiab txoj kev kawg ntawm kev nkag mus rau network txoj kev loj hlob.
Txawm hais tias qhov kev txhim kho nrawm ntawm kev sib txuas lus mobile yog qhov zoo tshaj plaws, vim tias qhov kev txwv tsis pub tsawg, lub davhlau ya nyob twg tsis tuaj yeem loj dhau, thiab lub vijtsam tso saib tsawg tsawg, cov neeg tseem ua tiav cov lus txuas nrog qhov kev ua tau zoo dua, uas yog, lawv vam tias yuav paub lub fiber. rau lub tsev. Lub povhaum ntawm fiber ntau mus rau lub tsev yog tias nws muaj bandwidth loj loj. Nws yog qhov zoo tshaj plaws los daws" kawg mais" bottleneck qhov tshwm sim los ntawm Is Taws Nem qaum rau cov neeg siv' s desktop.
Kev piav qhia ntawm FTTH kev daws raws li PON system:
Chaw ua haujlwm kawg (chav khoos phis tawj) OLT yog qhov tseem ceeb ntawm PON system tag nrho. Nws muab kev kub ceev interface rau lub suab, cov ntaub ntawv thiab lwm yam ntaub ntawv nkag, thiab muab PON interface rau passive optical faib network txuas qis. OLT yog qhov chaw tswj hwm ntawm PON system, los ntawm kev sib koom tes hauv lub network tswj kev ua tiav, kev tswj hwm thiab kev tswj hwm PON system.
ONU muab cov neeg siv cov ntaub ntawv, network video thiab cov kev pabcuam hauv xov tooj. Ethernet, lub pov haum thiab lwm yam kev cai yog siv los ua kom pom cov pob tshab ntawm cov neeg siv cov ntaub ntawv los ntawm PON system.
ODN network ntawm OLT thiab ONU yog passive optical faib network txuas ntawm cov kho qhov muag thiab cov khoom siv fiber ntau. Nws txoj haujlwm yog ua kom tiav qhov kev faib tawm thiab kev sib koom ua ke ntawm cov cim kho qhov muag, kom cov ntaub ntawv downlink tau faib rau txhua qhov chaw nres tsheb ONU, thiab cov ntaub ntawv uplink tau sib sau ua ke rau OLT cov khoom siv. ODN network tuaj yeem txais yuav ib-theem lossis ob-theem kev pom zoo ua haujlwm raws li qhov tseeb siv ib puag ncig.
OLT cov khoom suav nrog lub thawv OLT, pob OLT, daim OLT thiab daim OLT cov khoom. Lub thawv hom OLT thiab mini OLT series cov khoom yog 1U siab thiab txhawb 19 nti txheem khib installation. Lawv yog qhov me me thiab yooj yim, yoog siv, yooj yim xa tawm thiab kev ua haujlwm siab, thiab ua tau raws li qhov yuav tsum ua ntawm kev ua tau zoo khoom thiab ntim hauv chav computer chav yooj yim.
Mini OLT yog ntau dua, uas tuaj yeem ua tau raws li kev teeb tsa ntawm txoj kev hauv tsev lossis cov thawv khoom siv.
OLT yog qhov hloov tau yooj yim thiab tuaj yeem tsim kho raws li qhov yuav tsum tau ua ntawm cov khoom sib txawv.
Teb hom OLT adopts cam khwb cia txhuas IP65 tag nrho lub plhaub dej, uas tuaj yeem ua tau raws li kev siv cov xwm txheej ntawm ncej, hauv pem teb thawv lossis txoj kev hauv tsev.
Cov khoom lag luam yog feem ntau rau kev tsim kho ob txoj kev koom tes ntawm lub xov tooj cua thiab this vis thiab cov koom ua lag luam sib tham, muab kev daws teeb meem rau kev kho qhov muag kom pom tau nyob hauv qhov chaw kawg mais thiab dav dav rau cov neeg tseem ceeb. Nyob rau tib lub sijhawm, nws tseem siv rau peb hauv ib qho kev thov ntawm lub network, lub suab thiab video sib txuas lus ntawm tsoomfwv, kev ruaj ntseg pej xeem thiab cov lag luam loj, nrog rau HD video xyuas cov kab ke.
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