Inethiwekhi yokufinyelela optical inethiwekhi yokufinyelela esebenzisa ukukhanya njengendlela yokudlulisa, eshintsha izintambo zethusi, futhi isetshenziselwa ukufinyelela ikhaya ngalinye.Inethiwekhi yokufinyelela ebonakalayo ngokuvamile iqukethe izingxenye ezintathu: itheminali yomugqa obonayo we-OLT, iyunithi yenethiwekhi yokubona i-ONU, kanye nenethiwekhi yokusabalalisa yokubona i-ODN, lapho izingxenye eziyinhloko zenethiwekhi yokufinyelela optical ye-OLT ne-ONU.
Yini i-OLT?
Igama eligcwele le-OLT lithi Itheminali yomugqa we-Optical, itheminali yomugqa wokubona.I-OLT iyitheminali ye-optical line, futhi iyimishini yehhovisi emaphakathi yezokuxhumana.Isetshenziselwa ukuxhuma iziqu ze-fiber optical.Isebenza njengeswishi noma irutha kunethiwekhi yokuxhumana evamile.Kuyidivayisi yokungena yenethiwekhi yangaphandle kanye nokungena nokuphuma kwenethiwekhi yangaphakathi.Ibekwe ehhovisi elimaphakathi, imisebenzi ebaluleke kakhulu yokwenza ukuhlela kwethrafikhi, ukulawulwa kwebhafa, kanye nokuhlinzeka ngoxhumano lwenethiwekhi ye-passive optical egxile kumsebenzisi kanye nokwaba umkhawulokudonsa.Ngamagama alula, isebenzisa imisebenzi emibili: ekhuphuka nomfula, iqedela ukufinyelela phezulu kwenethiwekhi ye-PON;futhi ezansi nomfula, ithumela idatha etholiwe kuzo zonke izisetshenziswa zetheminali zabasebenzisi be-ONU ngenethiwekhi ye-ODN.
Yini i-ONU?
I-ONU iyunithi yenethiwekhi ye-Optical.I-ONU inemisebenzi emibili: Yamukela ngokukhetha ukusakaza okuthunyelwa i-OLT, futhi yamukele impendulo ku-OLT uma idatha idinga ukwamukelwa;qoqa futhi ufake kunqolobane idatha ye-Ethernet umsebenzisi adinga ukuyithumela, bese uyithumela ku-OLT ngokuya ngewindi elinikeziwe lokuthumela Thumela idatha egcinwe kunqolobane.
Izindlela zokuthumela zama-ONU kumanethiwekhi ahlukene e-FTTx nazo zihlukile.Isibonelo, i-FTTC (I-Fiber To The Curb): I-ONU ibekwe egumbini lekhompiyutha elimaphakathi lomphakathi;I-FTTB (I-Fiber Iya Esakhiweni): I-ONU ibekwe ebhokisini lokuhlangana lephaseji;I-FTTH (I-Fiber To The Home): I-ONU ibekwe kubasebenzisi basekhaya.
Yini i-ONT?
I-ONT i-Optical Network Terminal, iyunithi yokugcina kakhulu ye-FTTH, evame ukubizwa ngokuthi “ikati elibonayo”, elifana ne-xDSL electric cat.I-ONT iyitheminali yenethiwekhi yokubona futhi isetshenziselwa abasebenzisi bokugcina.I-ONU ibhekisela kuyunithi yenethiwekhi yokubona.Kungase kube namanye amanethiwekhi phakathi kwayo nomsebenzisi wokugcina.I-ONT iyingxenye ebalulekile ye-ONU.
Buyini ubudlelwano phakathi kwe-ONU ne-OLT?
I-OLT iyisiphetho sokuphatha, futhi i-ONU iyitheminali;ukuhlinzekwa kwesevisi ye-ONU kulethwa nge-OLT, futhi bobabili basebudlelwaneni benkosi nesigqila.Ama-ONU amaningi angalengiswa ngesihlukanisi ngaphansi kwe-OLT.
Iyini i-ODN?
I-ODN i-Optical Distribution Network, okuyisiteshi esiphathekayo sokudlulisa amehlo phakathi kwe-OLT ne-ONU.Umsebenzi oyinhloko ukuqedela ukudluliswa kwe-bidirectional kwamasignali optical.Ngokuvamile lezi zixhunywa izintambo ze-fiber optic, izixhumi ezibonakalayo, izihlukanisi ezibonakalayo, kanye nokufakwa.Izinto ezisekelayo zedivayisi zakhiwe ngama-splitter optical.
