Ungayihlukanisa kanjani inethiwekhi yokufinyelela optical OLT, ONU, ODN, ONT?

Inethiwekhi ye-optical access inethiwekhi yokufinyelela esebenzisa ukukhanya njengendlela yokudlulisa, esikhundleni sezintambo zethusi, futhi isetshenziselwa ukufinyelela kuyo yonke imizi.Inethiwekhi yokufinyelela ebonakalayo.Inethiwekhi yokufinyelela yamehlo ngokuvamile iqukethe izingxenye ezintathu: itheminali yomugqa wokubona i-OLT, iyunithi yenethiwekhi yokubona i-ONU, inethiwekhi yokusabalalisa yokubona i-ODN, phakathi kwayo i-OLT ne-ONU okuyizingxenye eziyinhloko zenethiwekhi yokufinyelela optical.

Yini i-OLT?

Igama eligcwele le-OLT lithi Itheminali yomugqa we-Optical, itheminali yomugqa wokubona.I-OLT iyitheminali ye-optical line kanye nemishini yehhovisi emaphakathi yezokuxhumana.Isetshenziselwa ukuxhuma imigqa ye-fiber optical trunk.Isebenza njengeswishi noma irutha kunethiwekhi yokuxhumana evamile.Kuyidivayisi ekungeneni kwenethiwekhi yangaphandle kanye nokungena kwenethiwekhi yangaphakathi.Ibekwe ehhovisi elimaphakathi, imisebenzi yokuphatha ebaluleke kakhulu ukuhlela ukuhamba kwethrafikhi, ukulawulwa kwebhafa, kanye nokuhlinzekwa kokuxhumana okugxile kumsebenzisi kwe-passive optical network kanye nokwabiwa komkhawulokudonsa.Ukukubeka kalula, kuwukufeza imisebenzi emibili.Ngomfula okhuphukayo, uqedela ukufinyelela phezulu komfula wenethiwekhi ye-PON;ngomfula ongezansi, idatha etholiwe ithunyelwa futhi isatshalaliswe kuwo wonke amadivaysi omsebenzisi we-ONU ngenethiwekhi ye-ODN.

Yini i-ONU?

I-ONU iyunithi yenethiwekhi ye-Optical.I-ONU inemisebenzi emibili: ithola ngokukhetha ukusakaza okuthunyelwa i-OLT, futhi iphendula i-OLT uma idatha idinga ukwamukelwa;iqoqa futhi igcine kubhafa idatha ye-Ethernet umsebenzisi adinga ukuyithumela, futhi iyithumele ku-OLT ngokuya ngewindi elinikeziwe lokuthumela Thumela idatha egcinwe kunqolobane.

Kunethiwekhi ye-FTTx, izindlela ezihlukene zokufinyelela ze-ONU zokuthunyelwa nazo zihlukile, njenge-FTTC (I-Fiber To The Curb): I-ONU ibekwe ekamelweni lekhompyutha elimaphakathi lomphakathi;I-FTTB (I-Fiber Iya Esakhiweni): I-ONU ibekwe emhubheni i-FTTH (I-Fiber Iya Ekhaya): I-ONU ibekwe kumsebenzisi wasekhaya.

Yini i-ONT?

I-ONT i-Optical Network Terminal, iyunithi yokugcina kakhulu ye-FTTH, ngokuvamile eyaziwa ngokuthi “imodemu yokubona”, efana nemodemu kagesi ye-xDSL.I-ONT iyitheminali yenethiwekhi yokubona, esetshenziswa kumsebenzisi wokugcina, kuyilapho i-ONU ibhekisela kuyunithi yenethiwekhi yokubona, futhi kungase kube namanye amanethiwekhi phakathi kwayo nomsebenzisi wokugcina.I-ONT iyingxenye ebalulekile ye-ONU.

Buyini ubudlelwano phakathi kwe-ONU ne-OLT?

I-OLT iyitheminali yokuphatha, futhi i-ONU iyitheminali;ukwenziwa kusebenze kwesevisi ye-ONU kukhishwa nge-OLT, futhi bobabili basebudlelwaneni benkosi nesigqila.Ama-ONU amaningi angaxhunywa ku-OLT eyodwa ngesihlukanisi.

Iyini i-ODN?

I-ODN i-Optical Distribution Network, inethiwekhi yokusabalalisa optical, isiteshi somzimba sokudlulisa optical phakathi kwe-OLT ne-ONU, umsebenzi oyinhloko ukuqedela ukudluliswa kwezimpawu ezimbili ze-optical, ngokuvamile ngezintambo ze-fiber optical, izixhumi ezibonakalayo, izihlukanisi ze-optical kanye nokufakwa xhuma lezi Ingxenye yemishini yokusekela yedivayisi, ingxenye ebaluleke kakhulu i-splitter ye-optical.