An optical access network inzvimbo yekuwana iyo inoshandisa chiedza senzira yekufambisa, ichitsiva waya dzemhangura, uye inoshandiswa kuwana imba yega yega. Iyo optical yekuwana network inowanzo ine zvikamu zvitatu: optical line terminalOLT, an optical network unitONU, uye optical kugovera network ODN, umo iyo yakakosha zvikamu zveOLTuyeONUOptical access network.
ChiiOLT?
Zita rizere reOLTndiyo Optical Line Terminal, optical line terminal.OLTis optical line terminal, uye ndiyo yepakati hofisi midziyo yekufonera. Inoshandiswa kubatanidza optical fiber trunks. Inoshanda seachinja or routermune zvechinyakare kutaurirana network. Icho chigadziro chemukova wekunze network uye yekupinda nekubuda kwemukati network. Yakaiswa pahofisi yepakati, iyo inonyanya kukosha kuuraya kurongeka kwetraffic, buffer control, uye kupa mushandisi-inotungamirwa passive optical network interfaces uye kugovera bandwidth. Mumashoko akareruka, inoshandisa mabasa maviri: kumusoro kwemvura, inopedzisa kukwira kwepamusoro kwePON network; uye yakadzika, inotumira iyo yakawanikwa data kune veseONUmushandisi terminal zvishandiso kuburikidza neODN network.
ChiiONU?
ONUndiyo Optical Network Unit. TheONUine mabasa maviri: Sarudzo gamuchira nhepfenyuro inotumirwa neOLT, uye kugamuchira mhinduro kuneOLTkana iyo data inoda kugamuchirwa; unganidza uye chengetedza data reEthernet iro mushandisi anoda kutumira, uye tumira kune iyoOLTzvinoenderana nehwindo rekutumira rakagoverwa Tumira iyo cached data.
Nzira dzekutumira dzeONUsmune akasiyana FTTx network zvakare akasiyana. Semuenzaniso, FTTC (Fiber To The Curb):ONUinoiswa mukamuri yepakati yekombuta yenharaunda; FTTB (Fiber Kuchivakwa):ONUinoiswa mubhokisi rekusangana rekoridho; FTTH (Fiber Kumba Kumba):ONUinoiswa muvashandisi vepamba.
Chii chinonzi ONT?
ONT ndiyo Optical Network Terminal, iyo yakanyanya terminal unit yeFTTH, inowanzozivikanwa se "optical cat", yakafanana ne xDSL yemagetsi katsi. ONT ndeye optical network terminal uye inoshandiswa kune vashandisi vekupedzisira.ONUzvinoreva optical network unit. Panogona kunge paine mamwe ma network pakati payo nemushandisi wekupedzisira. ONT chikamu chakakosha cheONU.
Hukama huri pakati peiONUuyeOLT?
TheOLTndiwo magumo ekutarisira, uyeONUndiyo terminal; theONUkupihwa kwesevhisi kunoitwa kuburikidza neOLT, uye vaviri vacho vari muukama hwatenzi-muranda. MultipleONUsinogona kuturikwa kuburikidza nekupatsanura pasi peOLT.
Chii chinonzi ODN?
ODN iOptical Distribution Network, inova nzira yemuviri yekufambisa kwemaziso pakatiOLTuyeONU. Basa guru nderekupedzisa bidirectional kutapurirana kwezviratidzo zvemaziso. Kazhinji izvi zvinobatanidzwa nefiber optic cables, optical connectors, optical splitters, uye kuiswa. Iyo inotsigira midziyo yemudziyo inoumbwa ne optical splitters.
