I-CWDM (Coarse Wavelength Division Multiplexing) kanye ne-DWDM (Dense Wavelength Division Multiplexing) zombili ubuchwepheshe obusetshenziswa kunethiwekhi ye-optical ukwandisa amandla ezixhumanisi ze-fiber optic ngokuvumela iziteshi eziningi (amasignali) ukuthi zidluliselwe ngesikhathi esisodwa phezu kwe-fiber efanayo kodwa kuma-wavelength ahlukene okukhanya. Nansi umehluko obalulekile phakathi kwama-transceiver e-optical e-CWDM kanye ne-DWDM:

Isikhala Sobude Bamagagasi:

I-CWDM: Iziteshi zihlukaniswe ngama-nanometer angu-20 (nm). Ngokuvamile, i-CWDM isebenzisa ubude be-wavelengths obusukela ku-1270 nm kuya ku-1610 nm, kanye neziteshi ezingu-18 eziphelele ku-spectrum.
I-DWDM: Iziteshi zisondelene kakhulu, ngokuvamile i-0.8 nm (igridi engu-100 GHz) noma i-0.4 nm (igridi engu-50 GHz). Lokhu kuvumela izinhlelo ze-DWDM ukuthi zisekele iziteshi eziningi ngaphakathi kobubanzi obufanayo be-spectral.

Inani Leziteshi:

I-CWDM: Isekela inani elincane leziteshi, ngokuvamile kufika kuziteshi ezingu-18.
I-DWDM: Isekela inani elikhulu leziteshi, okungenzeka ukuthi zifinyelele kuziteshi ezingu-80 noma ngaphezulu ku-C-band (1530-1565 nm) noma ngaphezulu nge-C-band enwetshiwe kanye ne-L-band.

Ibanga Lokudlulisela:

I-CWDM: Ngokuvamile isetshenziselwa amabanga amafushane, afinyelela ku-80 km ngaphandle kokukhulisa, kanye afinyelela ku-120 km ngokukhulisa okubonakalayo.
I-DWDM: Yakhelwe amabanga amade, kusukela ku-100 km kuya ku-4000 km noma ngaphezulu kuye ngohlobo lokukhulisa kanye nokunciphisa ukusabalala olusetshenzisiwe.

Ukuzinza Kwesiteshi:

I-CWDM: Iziteshi zihlukaniswe kakhulu, okwenza zingaphazamiseki kakhulu kodwa futhi zinciphise inani leziteshi ezitholakalayo.
I-DWDM: Iziteshi zigcwele kakhulu, okudinga ukulawulwa okunembe kakhudlwana kwamaza okukhanya kanye nezingxenye ezisezingeni eliphezulu ukuvimbela ukuphazamiseka phakathi kweziteshi eziseduze.

Izindleko:

I-CWDM: Ngokuvamile ingabizi kakhulu kune-DWDM ngenxa yemiklamo ye-transceiver elula kanye neziteshi ezimbalwa.
I-DWDM: Izindleko zokuqala eziphezulu ngenxa yemiklamo ye-transceiver eyinkimbinkimbi kakhulu kanye nesidingo sezingxenye ze-optical ezinembile kakhulu kanye nezindlela zokuzinzisa.

Ukuzivumelanisa nezimo:

I-CWDM: Kulula ukuyisebenzisa kumanethiwekhi amancane kuya kwaphakathi lapho kudingeka khona ubude be-wavelength obuncane, futhi lapho izindleko zingase zibe yinto ekhathazayo.
I-DWDM: Ihlinzeka ngosayizi omkhulu kanye nomthamo, okwenza ifaneleke kumanethiwekhi amakhulu kanye nokudluliselwa kwebanga elide lapho ukusetshenziswa kahle kwe-fiber bandwidth kubalulekile.

Ngamafuphi, ukukhetha phakathi kwama-transceiver e-CWDM kanye ne-DWDM kuncike ezintweni ezifana nomthamo odingekayo, ibanga lokudlulisa, izindleko ezicatshangelwayo, kanye nezidingo ezithile zengqalasizinda yenethiwekhi. I-CWDM ilula futhi ingabizi kakhulu kumabanga amafushane kanye namanethiwekhi amancane, kuyilapho i-DWDM inikeza umthamo ophezulu, ukufinyelela isikhathi eside, kanye nokukhula kwezinhlelo zokusebenza ezinkulu nezidinga kakhulu.