Multiplex Koj Lub Cim Fiber los ntawm Kev Siv CWDM los yog DWDM
Siv lub WDM (Wavelength Division Multiplexing) kom ua kom muaj peev xwm ntawm lub fiber ntau coj ntau tus neeg tau txais kev pabcuam yog ib txoj kev xav zoo li cov kabmob uas siv hluavtaws fais fab tsis pheej yig. Raws li WDM dav siv koj yuav tsum tsis pom txawv nrog nws, nws yog ib qho cuab yeej ua ke uas siv ntau cov ntaub ntawv / txheej txheem / yees duab los sis lub suab sib txuas ntawm tib lub cev fiber-optic cable, los ntawm kev siv ntau lub caij nyoog (frequencies) ntawm lub teeb nrog txhua zaus ib hom ntaub ntawv sib txawv.
Ob hom qauv ntawm WDM muaj: Coarse Wavelength Division Multiplexing (CWDM) thiab Qis Wavelength Division Multiplexing (DWDM). CWDM / DWDM multiplexer thiab demultiplexerand OADM (Optical Add-Drop Multiplexer) muaj feem ntau nyob hauv nrog Passive. Kev siv cov khoom siv kho tshuab hluav taws xob thiab kev tsim kho ntawm OTN (Optical Transport Network) uas muaj qhov FEC (Forward Error Correction), qhov sib txawv ntawm cov lus sib txuas ntawm fiber ntau tuaj yeem ncav cuag txhiab tus Kilometers uas tsis tas yuav tsum tau ua rau cov chaw tshiab.
CWDM
CWDM, txhua lub wavelength CWDM feem ntau txhawb nqa txog 2.5 Gbps thiab tuaj yeem muab nthuav mus rau 10Gbps. CWDM tsuas yog siv rau 16 wavelengths thiab feem ntau yog muab tso rau hauv tes hauj lwm mus txog 80Km txij li qhov kho qhov muag ntawm cov twj siv hluav taws xob tsis tuaj yeem siv tau vim muaj kev sib kis loj ntawm cov cai. CWDM siv ntau lub spectrum thiab haum rau yim daim. Qhov kev dav dav dav ntawm cov kev tso cai no yuav siv rau kev siv cov xovtooj cua nruab nrab, tabsis muaj peev xwm ua tau. CWDM feem ntau yog siv rau cov nqi qis, qis dua, daim ntawv luv luv uas qhov nqi yog qhov kev txiav txim siab tseem ceeb.
CWDM Mux / Demux (los yog CWDM multiplexer / demultiplexer) feem ntau yog ib qho kev sib txuas ua ke thiab ua si network, uas pab cov lag luam thiab tuam txhab lag luam kom pheej yig siv qhov taw qhia sib txawv los yog lub nplhaib raws li WDM optical networks. CWDM Mux / demux yog tsim txig tsim rau kev thauj cov PDH, SDH / SONET, ETHERNET cov kev pabcuam tshaj WDM, CWDM thiab DWDM hauv cov xovtooj uas pom tau zoo thiab cov kev siv tes haujlwm. CWDM Multiplexer Modules tuaj yeem pom nyob rau hauv 4, 8 thiab 16 channel configurations. Cov tswv yim no siv cov khoom siv kho qhov muag tawm ntau tshaj 4 ntau hauv cov khoom, xa rau lawv ib tug neeg qhov muag fiber ntau thiab tom qab ntawd de-multiplex qhov pib ntsaws rau cais, cov kev teeb tsa rau cov tswv yim mus rau hauv cov khoom siv khawm ntawm tag nrho cov lus sib tw rau koj qhov kev sib txuas ntawm fiber ntau.
Feem ntau CWDM kev daws teeb meem muaj peev xwm ua kom muaj 8 qhov kev muaj peev xwm ua tau rau kev thauj tus neeg tuaj ntawm 8 tus neeg tau txais kev pab cuam ntau tshaj qhov qub. Txawm li cas los xij, qhov sib cais ntawm CWDM wavelengths yuav tsim kom muaj kev sib txuas ntawm CWDM nrog rau lwm lub 44 wavelengths nrog 100GHz nro kev siv DWDM kev siv technology, yog li nthuav cov peev txheej qub thiab siv tib yam khoom los ua ib feem ntawm cov kev daws teeb meem.
DWDM
DWDM yog ib qho technology uas muaj peev txheej dhau ntawm kev mus ntev tshaj li ntawm 44-88 raws / wavelengths thiab xa ntaub ntawv cov nqi ntawm 100Mbps txog li 100Gbps ib nta ntev.
DWDM systems pack 16 los yog ntau dua rau hauv lub qhov rais nqaim heev ze ze ntawm 1550nm hauv zos attenuation tsawg kawg. Decreasing channel ntxig yuav tsum siv ntau leej thiab kim optics, tab sis pub rau ntau dua scalability. Cov DWDM qhov nruab nrab yog muab 1-44 raws cov peev xwm, nrog qee qhov kev txhim kho tshiab, muab rau 80-160 raws. DWDM feem ntau yog siv qhov uas yuav tsum tau muaj peev xwm ntau dua los ntawm ib qho kev siv cov roj fiber ntau lossis qhov uas nws yuav tsis raug nqi ntau dua.
DWDM multiplexer / demultiplexer Modules yog ua kom muaj ntau ntau DWDM raws hauv ib los yog ob daim txiag. Raws li hom CWDM Mux / Demux, nrog rau kev xaiv tsa, tuaj yeem xa tau thiab tau txais ntau npaum li 4, 8, 16 lossis 32 kev sib txuas ntawm ntau cov qauv, cov nqi ntaub ntawv lossis cov txheej txheem txuas dua ib qhov txuas ntawm fiber optic tsis muaj kev cuam tshuam ib leeg.
Thaum kawg, qhov kev xaiv los siv CWDM los yog DWDM yog qhov kev txiav txim siab nyuaj, ua ntej peb yuav tsum to taub qhov txawv ntawm lawv kom meej meej.
CWDM vs DWDM
CWDM rau 18 qhov kev xaiv. Thaum lub sij hawm, DWDM teev rau ntawm 80 tus (los yog ntau tshaj), tso cai rau ntau qhov nthuav dav. Lub CWDM qhov zoo tshaj plaws yog tus nqi ntawm cov khoom siv uas feem ntau yog 1/3 ntawm tus nqi ntawm qhov sib npaug ntawm DWDM optic. CWDM cov khoom yog nrov nyob rau hauv tsawg dua optics thiab txo nqi, tsawg dua cov hwj huam siv, tsis muaj lub lasers uas muaj cov kev tu txij nkawm. Qhov sib txawv ntawm qhov kev lag luam, cov peev nyiaj txiag uas muaj ntau cov neeg tau ntsib, thiab cov kev pib ua ntej yuav tsum tsis pub dhau 8 wavelengths, txhais tau hais tias CWDM yog ib qho chaw nkag ntau rau ntau tus neeg muas zaub.
Kev Yuav Cov CWDM los yog DWDM yog los ntawm cov xov tooj cua uas tsim nyog thiab cov kev loj hlob yav tom ntej. Yog hais tias koj tsuas xav tau ib lub tswv yim ntawm cov tsis thiab siv 1 Gbps optics, CWDM yog txoj kev mus. Yog tias koj xav tau kaum ob ntawm cov tsis, 10Gbps ceev, DWDM yog qhov kev xaiv nkaus xwb.
