Txawm hais tias muaj kev loj hlob sai ntawm cov khoom siv hauv network, kev lag luam sib txuas lus tab tom ntsib teeb meem loj heev. Ib qho ntawm cov thev naus laus zis tseem ceeb hauv kev sib txuas lus optical - Wavelength Division Multiplexing (WDM) - tau dhau los ua qhov kev daws teeb meem tseem ceeb rau kev kov yeej cov kev txwv no.

Yog tias cov fiber ntau optical piv rau txoj kev loj, kev sib txuas lus ib-wavelength ib txwm zoo li ib lub tsheb uas nyob thoob plaws txoj kev. WDM thev naus laus zis feem ntau faib txoj kev no mus rau hauv ntau txoj kab "virtual lanes" (cov wavelengths optical sib txawv), uas tso cai rau ntau cov ntaub ntawv xa mus tib lub sijhawm los ntawm tib lub fiber. Cov khoom siv tseem ceeb uas ua rau cov thev naus laus zis no yog lub lim dej DWDM (Dense Wavelength Division Multiplexing) passive. Tsab xov xwm no muab kev tshuaj xyuas luv luv ntawm cov thev naus laus zis no.

I. Cov Ntsiab Cai Tseem Ceeb thiab Cov Zoo ntawm Cov Lim Passive

DWDM tsis siv neeg, OSP Ring OADM, 1 Channel, 100 GHz Spacing, Channel 48, 900um 1m Fiber, SC/APC Connector

Lo lus "passive" txhais tau hais tias lub cuab yeej tsis xav tau lub zog sab nraud. Hloov chaw, nws tsuas yog siv cov txheej txheem optical thin-film lossis cov qauv grating kom raug cais (demultiplex) lossis sib xyaw (multiplex) cov teeb liab optical ntawm ntau qhov wavelengths sib txawv.

Qhov yam ntxwv ntawm lub cev no ua rau nws ruaj khov thiab ntseeg tau zoo heev, ua rau lub cuab yeej no tiv taus kev cuam tshuam hluav taws xob. Yog li ntawd, nws tsim nyog rau kev ua haujlwm ntev hauv chav sib txuas lus nyuaj lossis chaw nyob sab nraum zoov uas nyuaj.

Hauv cov qauv tsim kho qhov muag, cov lim dej DWDM passive ua haujlwm ua "cov tswj kev khiav tsheb." Lawv ua raws li International Telecommunication Union (ITU-T) cov qauv, faib lub qhov rais kis tau hluav taws xob qis mus rau hauv ntau kaum lossis txawm tias ntau pua txoj kev sib txuas lus ywj pheej nrog qhov sib nrug ntawm qhov ntev.

Qhov no txhais tau hais tias ib qho fiber ntau optical, thawj zaug muaj peev xwm nqa tau ib lub teeb liab xwb, tuaj yeem nthuav nws lub peev xwm kis tau tam sim ntawd los ntawm ntau lub sijhawm, ua rau kev ua haujlwm ntawm spectral zoo dua.

II. Cov Xwm Txheej Siv thiab Tus Nqi

Passive DWDM, OSP Ring OADM, 1 Channel, 100 GHz Spacing, Ch52, Monitor (1%), 900um 1m Fiber, Tsis Muaj Connector

Cov lim dej passive no feem ntau yog tsim los nrog cov qauv ntim khoom txheem, xws li LGX cassette modules lossis 19-nti rack-mount cards, thiab nruab nrog cov khoom siv fiber optic siab rau kev sib koom ua ke rau hauv cov tes hauj lwm fiber ntau ib hom uas twb muaj lawm. Lawv cov txiaj ntsig tseem ceeb ntawm daim ntawv thov suav nrog:

Kev Nthuav Dav ntawm Metropolitan Transmission thiab Backbone Network

Tsis tas ntxiv cov xov hlau fiber tshiab, WDM thev naus laus zis tuaj yeem ua rau kom muaj kev sib kis ntawm cov tes hauj lwm hauv nroog thiab cov tes hauj lwm hauv cheeb tsam sai dua, ua tau raws li cov ntaub ntawv loj heev ntawm cov kev pabcuam xws li kev tshaj tawm video siab thiab kev suav huab.

Sab Nraud Cog (OSP) thiab Kev Nkag Mus Rau Cov Tes Haujlwm

Ua tsaug rau lawv cov yam ntxwv tsis muaj zog thiab tsis tas yuav saib xyuas, cov khoom siv no tau siv dav hauv cov tes hauj lwm faib khoom siv sab nraum zoov, ua rau txo cov nqi ua haujlwm thiab kev saib xyuas mus sij hawm ntev rau cov neeg teb xov tooj.

Kev Sib Txuas Lus ntawm Chaw Khaws Cov Ntaub Ntawv

Hauv cov chaw khaws ntaub ntawv lossis ntawm ntau lub chaw khaws ntaub ntawv, cov lim dej tsis siv neeg ua rau muaj kev xa cov teeb liab ntau yam zoo heev nrog kev poob qis heev, ua kom muaj kev xa cov ntaub ntawv sai thiab ruaj khov.