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 1G rau ib tus neeg siv khoom. Muaj feem xyuam passive kho qhov muag cov khoom: PLC splitter. Thiab FTTH yog yav tom ntej kev 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 kev siv bandwidth no, 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 yuav khoom. 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 paub txhij txhua tias 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 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). Kev sib cais ntawm lub zog kho qhov muag ntawm ntau tus neeg tau txais kev pab hauv PON (Passive Optical Network) muaj cov peev nyiaj siv hluav taws xob tsis zoo.
Xyoo tsis ntev los no FTTH muaj qee qhov kev tsim kho, xws li cov lus thov kom 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 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 los siv xws li FTTH network. Tam sim no WDM cov tshuab tuaj yeem muab cov bandwidth 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.
