CWDM vs DWDM | Qhov sib txawv ntawm CWDM thiab DWDM
CWDM-Coarse Wavelength Division Multiplexing
Daim duab-1 qhia txog cov kab mob CWDM raws fiber ntau. Raws li pom tias nws siv los xa 4 daim ntaub ntawv sib txawv uas siv tib qhov muag kho qhov muag tsis muaj khub fiber ntau cables. Cov kev siv ntau yam sib txawv siv cov teeb meem sib txawv ntawm qhov sib txawv uas pab rau hauv kev sib txuam thiab sib-ua ntaub ntawv sib kis ntawm kev xa tawm thiab tau txais qhov kawg.
DWDM-Dense Wavelength Division Multiplexing
Daim duab-2 qhia txog DWDM cov cai uas muaj ntawm cov chaw xa khoom thiab chaw xa khoom. Feem ntau DWDM muaj MUX, DEMUX, cais tawm, circulators, EDFA (Erbium Doped Fiber Amplifier) thiab lwm yam.
DWDM qhov system
| Specifications / Nta | CWDM | DWDM |
|---|---|---|
| Tag nrho daim ntawv | Coarse Wavelength Division Multiplexing, WDM system muaj tsawg dua 8 tus kab mob nquag ua si ntawm ib lub tshuab fiber ntau | Qis Wavelength Division Multiplexing, WDM system muaj ntau tshaj 8 yam mob wavelengths ib qho fiber ntau qhov muag |
| yam ntxwv | Txhais los ntawm wavelengths | Txhais los ntawm frequencies |
| muaj peev xwm | qis dua | siab dua |
| nqi | tsawg | siab |
| Nrug | luv kev sib txuas lus | ntev kev sib txuas lus |
| Frequencies | siv ntau nrawm heev | siv cov voj ntau zaus |
| Wavelength nrawm | ntau dua | tsawg, li no tau ntim 40+ raws sib piv rau CWDM nyob rau tib lub sijhawm sib xws |
| Amplification | lub teeb liab tsis muaj zog nyob ntawm no | teeb liab kev lag luam yuav siv tau ntawm no |
| Tsav | Wavelength drift yog tau | Precision lasers yuav tsum tau ua kom khiav raws cov phiaj xwm |
| Kev siv spectrum | Rhuav cov spectrum rau hauv cov chunks loj loj | dices lub spectrum mus rau hauv me me pieces |
| Cov nquag siv cov wavelengths ib rab phom | Tsawg dua 8 | Ntau tshaj 8 |
WDM (Wavelength Division Multiplexing) yog ib hom siv technology hauv kev sib txuas lus sib txuas. Nws feem ntau tau npaj los koom ntau lub wavelengths mus rau ib tus tib leeg. Hauv WDM system, nws muaj ob hom kev ua haujlwm: Coarse Wavelength Division Multiplexing (CWDM) thiab Qee Wavelength Division Multiplexing (DWDM). CWDM thiab DWDM ob leeg muaj nyob rau hauv kev ua ub ua no los yog lub cev tsis muaj zog. Tsab xov xwm no yuav tham txog qhov sib txawv ntawm CWDM vs DWDM.
Kev Tiv Thaiv CWDM Yog Dab Tsi?
CWDM feem ntau ua hauj lwm hauv cov xwm txheej uas tsuas yog siv ntau qhov kev xav tau thiab tsis tas yuav ncua ntev li 70 km. Tus CWDM yog tus ua kom tiav ntawm CWDM uas tsis siv hluav taws xob. Nws faib cov wavelengths los ntawm cov khoom siv dav hlau kho kom zoo li bandpass lim thiab cov khoom qub. Feem ntau cov CWDM cov cuab yeej ua haujlwm tsis muaj mob. CWDM Mux Demux yog cov khoom siv feem ntau siv rau hauv CWDM qhov passive system.
Dab tsi yog Passive DWDM?
DWDW cov cuab yeej siv tau ntev ntev kho qhov muag. Nws muaj peev xwm raug muab faib ua ob yam sib txawv: ib qho kev sib tiv tauj thiab ib txoj kev tov. Cov dej num sib tov yog ib qhov zoo rau cov kev siv nrog ntau tshaj 32 kev sib txuas ntawm tib lub yeeb tshuaj. Dlaim DWDM cov kev daws teeb meem muaj tsawg dua, tab sis, cov ntsiab lus muaj kev ruaj ntseg dua thiab tsis muaj latency dua. Hauv kev siv DWDM lub vev xaib, txoj kab ua haujlwm tsuas yog siv los ntawm kev siv cov twj paj nruag. Cov txheej txheem DWDM muaj peev xwm ua kom muaj kev kub ceev uas muaj peev xwm tshaj lij, tab sis qhov kev sib kis ntawm kev tswj thiab kev tswj tsis txwv. Cov kev siv loj ntawm DWDM txoj kev khiav dej num yog cov kev sib txuas lus hauv xov tooj thiab cov kev sib txuas lus ceev ceev.
Passive CWDM vs DWDM: Dab tsi yog qhov txawv?
Passive DWDM thiab CWDM yog ua raws li tib lub tswv yim ntawm kev siv ntau lub wavelengths ntawm lub teeb rau ib leeg. Ob ntawm lawv yuav tsum tsis muaj hwj chim thiab yooj yim rau kev ntiav. Txawm li cas los xij, lawv tseem txawv rau ib leeg. Cov nram qab no yuav qhia txog qee qhov kev sib txawv ntawm CWDM vs DWDM.
Passive CWDM thauj mus txog 18 lub wavelengths (txij 1470nm mus rau 1610nm) nrog ib txoj kab nrig ntawm 20nm. Thaum passive DWDM tuaj yeem ua raws li 40, 80 los yog txog li 160 wavelengths nrog qhov nruab nrab qhov ntev ntawm 0.8nm, 0.4nm los yog 0.2nm. Nws cov wavelengths yog los ntawm 1525nm txog 1565nm (C band) thiab 1570nm rau 1610nm (L band).
Passive DWDM txhawb ntau txoj kev tshaj li CWDM. Tus qub tuaj yeem muab rau 80 raws thaum lub caij nyoog xwb txhawb nqa txog 18 raws.
Qhov siab tshaj plaws ntawm lub CWDM uas yog passive yog txog 160 km. Txawm hais tias qhov DWDM lub cev tsis muaj qhov tsis muaj kev kho siab rau qhov ua kom tau ntev ntev, nws tuaj yeem ntev ntev dua CWDM.
Ua tau, tus nqi yog txuam nrog kev xa los ntawm lub system. Feem ntau, cov cuab yeej DWDM cov khoom siv tseem kim heev dua li cov kab CWDM uas tsis zoo. Tab sis tus CWDM tsis tshua muaj txiaj ntsim zoo rau qhov kev sib txuas mus sab hauv 10G thiab luv nrug.
Xaus
Tom qab sib piv ntawm CWDM vs DWDM, peb pom tau tias txhua tus muaj qhov zoo thiab qhov tsis zoo. Qhov twg yuav tsum yog nyob ntawm qhov kev xav tau tiag tiag. Vam cia cov lus peb tham hauv tsab xov xwm tuaj yeem pab txiav txim siab txog kev pom zoo. Yog tias koj xav paub ntau dua, thov tuaj saib FS.COM.
CWDM SFP vs DWDM SFP - Ib Qhov Twg Yog Ib Qhov Uas Koj Zoo?
SFP (Small Form Factor Pluggable) yog tsim los ua kom tau raws li Cov Ntawv Pom Zoo Tshaj Xo (MSA) kom ntseeg tau tias cov khoom siv sib txuas ntawm lub network. Tsis ntev los no, cov cuab yeej siv wavelength-division multiplexing (WDM) zoo siab txais tos los ntawm cov neeg siv internet thoob plaws ntiaj teb. Nws yog ib qho cuab yeej siv uas muaj ntau cov khoom siv kho qhov muag ntawm ntau lub lauj kaub ntawm laser lub teeb nyob rau ntawm ib lub tshuab fiber ntau. Los ntawm kev siv WDM technology, SFP modules yuav muaj qhov txawv wavelengths rau lawv. Cov lus hauv qab no yuav qhia txog cov lus piav qhia ntawm ob hom SFP cov kev qhia: DWDM vs CWDM.
Qhia txog CWDM SFP
CWDM SFP yog ib hom kev hloov tshuab luam yeeb uas siv CWDM technology. Ib yam li cov qauv SFP, CWDM SFP yog ib qho khoom siv khiav tawm / tso zis kub. Nws txuas mus rau hauv qhov chaw nres nkoj ntawm SFP los yog qhov hloov ntawm tus taw los yog router thiab txuas qhov chaw nres nkoj nrog lub network fiber-optic. CWDM SFP transceiver modules siv lub SFP interface txuas cov cuab yeej siv thiab siv dual LC / PC fiber ntau interface rau txuas lub network kho qhov muag. Muaj yeeb yuj CWDM SFP modules nyob hauv qab no.
Nws yog qhov zoo paub tias CWDM SFP modules tuaj nyob rau hauv 8 wavelengths npog ntawm 1470 nm rau 1610 nm. Cov cim xim ntawm cov khoom siv qhia lub wavelength uas Gigabit Ethernet channel tau sib mapped. Cov duab hauv qab no teev cov CWDM SFPs nrog lawv cov wavelengths thiab xim xim.
DWDM SFP Txheej txheem
DWDM (Dense Wavelength-Division Multiplexing) Kev sib txuas lus SFP siv los ua ib feem ntawm DWDM kho qhov muag network kom muaj peev xwm tshaj qhov muaj peev xwm thoob plaws qhov kev siv fais fab network, uas yog kev ua haujlwm siab, tus nqi zoo rau kev kho qhov muag cov ntaub ntawv sib txuas lus txog 4.25 Gb / s. Muaj 32 lub DWDM SFPs uas tau txhawb nqa lub International Telecommunications Union (ITU) 100-GHz wavelength kab sib chaws. Ib qho qauv hauv DWDM SFP muaj nyob rau hauv qab no.
Daim ntawv thov
CWDM SFP transceiver yog siv dav hauv kev sib txuas lus rau kev sib txuas lus ntawm kev sib txuas lus thiab kev sib txuas lus. Nws yog tsim los rau kev khiav hauj lwm hauv Xov Tooj Xov Tooj thiab cov Point-to-Point tes hauj lwm uas siv Synchronous Optical Network (SONET), SDH (Synchronous Digital Hierarchy), Gigabit Ethernet thiab Fiber Channel khoom siv. DWDM SFP tuaj yeem siv rau hauv DWDM SONET / SDH (nrog los sis tsis muaj FEC), tab sis ntev dua kev kis mus li 200km kev sib txuas thiab Ethernet / Fibre Channel raws tu qauv rau kev sib tham 80km.
Yam SFP Module Hom Koj Yuav Xaiv: DWDM vs CWDM?
Los ntawm tus nqi qis, qhov CWDM SFP module pheej yig tshaj DWDM SFP. Nws muab kev yoojyim thiab txo tus nqi rau txoj kev ywj pheej ntawm Gigabit Ethernet thiab Fiber Channel. Ntawm qhov tod tes, qhov tseem ceeb hauv kev xaiv DWDM vs CWDM SFP modules nyob hauv qhov txawv ntawm CWDM thiab DWDM. Lawv hais txog kev sib txawv ntawm txoj kev faib tawm lub teeb. Piv txwv, CWDM siv txoj kab nrig nrawm ntawm cov kev sib tw, pub rau SFP pheej yig, thiab DWDM siv qhov kev sib txuas channel, uas tso cai rau ntau lub wavelengths los siv rau ib tus qauv. DWDM feem ntau yog siv rau cov tes hauj lwm kho qhov muag loj loj kom ntev ntev. Li no yog tias koj tab tom nrhiav SFP modules dhau deb nrug thiab nrog scalability zoo dua, DWDM SFP module yog qhov kev xaiv zoo tshaj.
Xaus
Kuv vam tias cov lus qhia luv luv no rau DWDM vs CWDM SFP modules yuav pab tau koj xaiv qhov xaiv lawv. Raws li Cisco CWDM SFPs, FOCC CWDM SFPs yog cov xa tawm ntau tus nqi, txhawb cov ntaub ntawv tawm ntawm 100 Mbps txog 4 Gbps. Dhau li ntawd, lawv txhawb kev ncua deb ntawm 20-40km, 40-80 km thiab 80-120km hauv cov xim sib txawv, ntau hom kev xav tau ntawm cov neeg. Tag nrho DWDM SFP modules ua tau raws li cov cai ntawm IEEE802.3 Gigabit Ethernet txuj. Lawv tsim nyog rau kev sib txuas lus hauv Gigabit Ethernet thiab Fiber Channel environments.