Tam Sim No Zoo Tshaj Plaws thiab Kev Ua Haujlwm rau FTTH
FTTH, Fiber rau lub tsev, koj paub. Nws muab cov neeg siv khoom kawg ntawm cov thev naus laus zis. Muaj qhov xwm txheej uas cov xov tooj hluav taws xob fiber ntau txuas ntxiv rau ONU (Optical Network Unit) raws li cov neeg siv khoom lag luam, nws tseem muab cov qhua tuaj noj mov tsis muaj kev txwv rau txhua daim ntawv thov xws li yees duab, suab thiab cov ntaub ntawv muaj kev kub ceev thiab qhov nrawm tuaj yeem ncav cuag txog li 1G rau ib tus neeg siv khoom. Muaj feem xyuam passive kho qhov muag cov khoom: PLC splitter Cov. Thiab FTTH yog yav tom ntej ua pov thawj, nws dhau los ua tib lub thev naus laus zis uas tuaj yeem ua tau raws li qhov yuav tsum tau ua rau qhov bandwidth siab, FTTH architecture yog pom ntawm daim duab.
Peb paub ONU tsim nyog rau txhua tus neeg siv khoom ntau dua li ib pab pawg ntawm ntau txog ntau pua tus neeg muas zaub. FTTH tsis raug nqi rau lub sijhawm no, thiab nyob ntawm kev nce qib hauv kev siv thev naus laus zis los ua kom muaj txiaj ntsig bandwidth rau cov xaim hluav taws xob zoo thiab siv tshuab ONU zoo.
Zoo, FTTH yuav muaj coob tus neeg nyiam. Peb tuaj yeem paub tom qab kev paub txhij txhua uas txoj kev yooj yim tshaj plaws los muab FTTH yog siv passive 1: N optical splitter los faib cov kho qhov muag bandwidth sib luag ntawm N cov neeg siv khoom. Hloov pauv, ib qho fiber ntau kuj tseem tuaj yeem thov rau ob qho kev qhia od kis tau tus mob siv wavelength faib multiplexing (WDM). Qhov sib cais ntawm lub zog kho qhov muag ntawm ntau tus neeg tau txais kev pab hauv PON (Passive Optical Network) muaj cov nyiaj siv fais fab loj rau kev kho qhov muag.
Xyoo tsis ntev los no FTTH muaj qee qhov kev tsim kho, xws li cov lus pom zoo rau kev tsim GNDG (gigabit lub teb chaws cov phiaj xwm daim phiaj xwm), nws tuaj yeem kov yeej txoj kab kev sib txuas lus xav tau rau yav tom ntej thiab kev thov kuj tseem tso cai rau kev siv lwm txoj kev siv thev naus laus zis, twb tau sib tham, xws li XDSL, coax lossis wireless txuas los muab kev pabcuam ntawm cov ntaub ntawv qis. Txawm li cas los xij, kev cuam tshuam rau cov kev daws teeb meem zoo li no yuav raug nqi ntau npaum li qhov kawg ntawm FTTH infrastructure. Qhov tseeb, WDM nrog cov kho qhov muag tawg lossis cov qhov muag hluav taws xob yog cov thev naus laus zis tseem ceeb uas yuav tsum tau siv rau FTTH network. Tam sim no WDM cov tshuab tuaj yeem muab cov kab xev ntim ntawm 40G rau ib qho, siv 16 ntu ntev ntawm 2.5 G ib qho, thiab cia siab tias nws tuaj yeem ncav cuag 100 rerabits hauv 5 xyoos tom ntej.
