Qhov zoo thiab qhov tsis zoo ntawm FTTH yog qhov tseem ceeb raws li hauv qab no: Ua ntej, nws yog lub network passive, los ntawm lub hauv paus chaw haujlwm mus rau tus neeg siv, nruab nrab tuaj yeem ua tsis tau siab; thib ob, nws txoj kab sib sau yog qhov dav dav, Qhov kev deb ntev yog nyob ntawm txoj kab nrog qhov kev ua haujlwm loj ntawm cov neeg teb xov tooj; thirdly, vim tias nws yog cov kev pabcuam nqa ntawm cov kabmob fiber ntau, tsis muaj teebmeem dabtsi; plaub, vim tias nws txoj kab dav dav, cov kev txhawb nqa kev tiv thaiv zoo tuaj yeem hloov kho tau ntau dua; tsib, Nrog rau kev txhim kho thev naus laus zis, cov hau kev muaj xws li qhov taw tes-rau-taw qhia, 1.25G thiab FTTH tau tsim cov haujlwm ua tiav tau zoo.
Cov fiber ntau txuas ncaj qha rau cov neeg siv' s lub tsev, thiab nws txoj kev siv bandwidth, yoj hluav taws xob thiab tshuab thev naus laus zis tsis txwv. 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 qhov kawg txoj kev rau kev txhim kho ntawm cov neeg siv network. Txawm hais tias qhov kev txhim kho nrawm ntawm kev sib txuas lus mobile yog qhov zoo tshaj plaws, vim tias nws muaj kev txwv tsawg, cov davhlau ya nyob twg tsis zoo li yuav loj dhau, thiab lub vijtsam tso saib tsawg tsawg, tib neeg tseem ua tiav cov ntawv cog lus nrog kev ua tau zoo, uas yog, vam tias yuav ua tiav rau lub tsev. Qhov kev nyiam ntawm fiber ntau-rau-tsev yog tias nws muaj qhov ua tau zoo zoo. Nws yog qhov zoo tshaj plaws los daws" kawg mais" bottleneck los ntawm Is Taws Nem qaum rau tus neeg siv' s desktop.
Nrog rau kev kho dua tshiab thev naus laus zis, tus nqi ntawm fiber ntau rau hauv tsev tau txo qis heev, thiab tsis ntev nws tuaj yeem raug txo rau DSL thiab HFC network, uas ua rau cov kev siv ntawm FTTH ua tau. Raws li cov lus ceeb toom, thaum pib txog xyoo 1997, NTT Corporation ntawm Nyij Pooj tau pib tsim FTTH. Tom qab 2000, cov naj npawb ntawm cov neeg siv nce vim tias tus nqi txo. Hauv Tebchaws Asmeskas thaum Lub Kaum Ob Hlis, tus lej ntawm FTTH nruab nrog ntau dua 200%.
Txog kev lag luam fiber ntau-rau-tsev, cov tuam txhab muaj lawv qhov kev xav: AT& T hauv Asmeskas tsis zoo txog FTTH. Ntawm OFC2004, lub tuam txhab ntseeg hais tias bandwidth tsis yog omnipotent, thiab kev tsim kho ntawm kev siv thiab cov ntsiab lus yog qhov tseem ceeb, yog li nyob rau lub sijhawm txiav txim siab rau kev ua lag luam rau FTTH tej zaum yuav muaj tsawg; Asmeskas cov koom tes Verizon thiab Sprint tau ua haujlwm ntau dua, thiab lawv tau qhia lawv cov phiaj xwm thiab kev daws teeb meem rau kev tsim FTTH ntawm OFC2004. Hauv Suav teb, fiber-rau-tsev yog qhov tseem ceeb. Cov duab fiber-rau-lub tsev sim network kuj tau pib ua hauv nroog xws li Wuhan thiab Chengdu. Nws cia siab tias xyoo 2012, los ntawm ntug dej hiav txwv mus rau thaj av loj, txij sab hnub tuaj mus rau sab hnub poob, fiber-rau-tsev-tsev yuav pib tsim hauv Suav teb. Qhov kawg ntawm kev tsim kho. Nws tuaj yeem hais tias fiber ntau-rau-tsev yog qhov chaw ci ntsa iab ntawm kev sib txuas lus fiber ntau. Nrog rau kev loj hlob thiab kev siv ntawm cov tshuab sib xws, tus nqi yuav raug txo ntxiv mus rau theem uas tsev neeg tuaj yeem tiv taus. Cov dav dav ntawm FTTH tsis ruaj khov.
Ib qho ntxiv, FTTH tshuab tseem siv los daws" kawg mais" teeb meem hauv cov ntaub ntawv superhighway. FTTH + Ethernet dua ADSL (ADSL yuav tsim kom muaj qhov theoretical siab tshaj plaws 8Mbps download bandwidth thaum ntaus xov tooj, cov bandwidth no yuav tsis hloov. Txawm li cas los xij, vim lub suab nrov nrhiav cov txheej txheem ntawm ADSL, yog tias cov kab mob tsis zoo, kev sib txuas tsim thaum pib yog pom tseeb Nws yog tsis yooj yim sua kom mus txog qhov theoretical tus nqi, thiab tej zaum kawg yog 5Mbps, thiab qhov bandwidth no yuav tsis hloov.) Thiab ISDN (qhov nrov hauv xov tooj network daim ntawv nyob hauv Europe) kis tau nrawm dua.
Tom ntej no, cia' s soj ntsuam saib qhov tsis zoo ntawm TU. Piv nrog rau qhov zoo, muaj ntau yam tsis zoo. Qhov tsis zoo tshaj plaws yog cov uas. Ua ntej, raws li MAC cov kev txwv ceev hom, lub sijhawm yuav ncua sijhawm thaum lub dav dav yog tag nrho. Sawv. Thib ob: Hais txog qhov nrawm, FTTH muab 4M uplink thiab 100M downlink, uas yog cov kab tsis sib xws. FTTB belongs rau cov phooj ywg sab saud thiab qis dua, thiab qhov siab tshaj plaws yog 10M.
