DWDM yog thev naus laus zis uas xa cov ntaub ntawv ntau yam los ntawm ib qho txuas network. Ntawm kev sib kis ntawm qhov kawg, muaj qhov kho qhov muag ntau ntxiv, uas tuaj yeem hloov kho ob lossis ntau lub cim ntawm qhov sib txawv ntawm cov yoj hluav taws xob. Thaum tau txais qhov kawg, optical demultiplexer yog siv los cais cov teeb liab, thiab cov teeb liab ploj hauv cov txheej txheem tuaj yeem txo los ntawm cov kho qhov muag loj. Yog li no, DWDM kev sib txuas tuaj yeem siv rau cov ntaub ntawv xa mus ntev, vim tias nws tuaj yeem nce cov bandwidth ntawm cov network muaj tam sim no.
OTN sawv cev rau cov xaib kho qhov muag. Nws muab tag nrho network lub moj khaum, uas ntxiv SONET / SDH zoo li cov haujlwm rau WDM cov khoom siv, xws li kev soj ntsuam xyuas kev ua haujlwm, kev tshawb pom qhov txhaum, kev sib txuas lus channel thiab multiplexing hierarchy. Nws ua haujlwm hauv thawj txheej thiab sau ntau yam haujlwm rau hauv qhov tunnel ntawm WDM thev naus laus zis, yog li ua kom cov khoom sib kis tau deb thiab qhov muaj peev xwm kho qhov muag fiber ntau. Qhov no txhais tau hais tias OTN thav duab ua ke ua haujlwm yooj ntawm SDH / SONET thev naus laus zis nrog bandwidth nthuav dav peev xwm ntawm DWDM, kom nws tuaj yeem muab cov kev xa mus, sib txuam, kev hloov pauv, kev tswj hwm, kev saib xyuas thiab muaj sia nyob ntawm cov channel kho qhov muag nqa cov neeg siv khoom.
DWDM yog cov ntsiab lus-taw-rau-kab, thaum OTN yog tsim ntawm OXC thiab OADM, uas muaj cov haujlwm xws li optical hla muaj peev xwm thiab yoj hloov. OTN tau tsim kho los ntawm DWDM thev naus laus zis los ua kom zoo dua cov kev pab cuam uas muaj tam sim no ntawm kev thauj mus los sib txuas. Ntxiv rau qhov muab cov peev xwm loj DWDM xa mus, OTN kuj tseem tso cai sib txawv DWDM raws li cov kev xav tau.
OTN network outperforms DWDM Network nyob rau hauv cov nqe lus ntawm wavelength, standard multiplexing hierarchy thiab xaus-rau-kawg optical kis tau pom meej, kev ruaj ntseg thiab sib txuas ua haujlwm.
