Tom qab: Khoom siv fiber tsawg;WANs bandwidth urgently xav tau nce ntxiv.
Xyoo tsis ntev los no, Raws li tus naj npawb thiab hom ntawm cov neeg siv nce, lub siab ntawm lub peev xwm network maj mam hloov mus rau WANs.
Cov yam ntxwv ntawm WANs:
Kev sib kis luv luv;
Kev nkag tau yooj yim;
Kev siv bandwidth dav;
Kev lag luam ntau ntau thiab ntau yam;
Kev siv hluav taws xob qis;
Cov nqi qis dua.
Qhov sib txawv ntawm cov kev qhia tshwj xeeb ntawm CWDM thiab DWDM:
Sib piv cov khoom | CWDM | DWDM |
Wavelength / zaus sib nrug | 20nm | 50GHz 0.4nm 100GHz 0.8nm 200GHz 1.6nm |
Ntau ntawm wavelength | 1270 ~ 1610nm, Tshaj 18 band | 1528.77 ~ 1563. 86 nm, 100GHz siab kawg 48 bands, 50GHz siab kawg 96 bands |
Pub siv tau sib txawv | GG lt;=6.5nm | GG lt;=0.11nm |
Laser | Tsis muaj / nrog cua txias (1G / 10G) | Txias laser (1G / 10G) |
System nrog lossis tsis muaj suab nrov | Tsis yog (CWDM tuaj yeem siv RA) | Yog lawm (EDFA, RA) |
TIU-T qhov kev pom zoo | G.694.1 | G.694.2,G695 |
Saib Channel | ESC | OSC, ESC |
Yog li no, CWDM thev naus laus zis muaj tib qho txuj ci technology zoo li DWDM. Tab sis CWDM muaj qhov zoo ntawm cov nqi qis thiab kev siv hluav taws xob tsawg.
Raws li qhov tshwm sim, kev siv CWDM thev naus laus zis los tsim WANs lossis network nthuav dav yog ib qho kev xaiv zoo thiab kev lag luam zoo tshaj plaws, uas tuaj yeem txo cov nqi network, hloov kho txuas ntxiv mus rau kev tsim kho thiab nce ntxiv ntawm cov kev pabcuam, thiab daws teeb meem kev siv nyiaj txiag ntawm WANs nthuav dav.
Tam sim no, CWDM thev naus laus zis yog qhov paub tab thiab cov khoom lag luam tau yooj yim. Nws tuaj yeem siv rau hauv txheej nkag thiab sib xyaw ua ke ntawm ntu cheeb tsam nroog loj, tab sis tsis tuaj yeem siv rau hauv cov txheej txheej txheej.
Vim tias 2.5Gbit / s tus tuav dej tau txais kev pabcuam thiab muaj peev xwm tsuas yog 8 nthwv dej ntawm CWDM system hauv cov txheej txheej tseem ceeb ntawm cov nroog loj hauv cheeb tsam tsis tuaj yeem ua tiav cov kev xav tau ntawm cov txheej txheej tseem ceeb ntawm cheeb tsam nroog, tab sis rau txheej nkag thiab sib dhos txheej ntawm WANs.
Hauv lwm lo lus, feem ntau tus naj npawb ntawm wavelengths yuav tsum tsis pub tshaj 8, thiab feem ntau ntawm cov tshuab CWDM tam sim no tuaj yeem muab 8 wavelengths.
Nyob rau tib lub sijhawm, feem ntau muaj qee qhov xwm txheej ntawm kev sib kis ntev thiab cov khoom siv hluav taws xob optical fiber ntau hauv cov sib txuas hauv zos.
Cov yam ntxwv pheej yig ntawm CWDM cov neeg tuaj yeem ua qhov sib txawv nruab nrab ntawm qhov kev sib kis ntawm 0 ~ 50km, yog li CWDM cov kab ke siv nyob rau hauv cov xov kab network thiab hauv zos. Tsuas yog los ntawm hauv qab no peb tuaj yeem qhia peb txoj kev sib tw kom zoo dua.
Nrog rau qhov ntau ntawm cov nqi ntawm cov ntaub ntawv sib txuas lus hauv lub network thiab qhov kev nce ntxiv ntawm qhov kev sib txuas lus kho qhov muag muaj peev xwm, CWDM thev naus laus zis yuav dhau los ua cov kev daws teeb meem zoo rau cov chaw hauv cheeb tsam kev tsim kho nrog nws cov yam ntxwv ntawm tus nqi qis, yooj yim topology, thiab ntau hom tau cov kev pabcuam.
Los ntawm qhov no peb tseem tuaj yeem kwv yees tau tias yav tom ntej kev txhim kho kev ua lag luam ntawm CWDM thiab DWDM tsis yog los hloov chaw sib, tab sis tsis yog txhawb ntxiv.