An optical access network inzvimbo yekuwana iyo inoshandisa chiedza senzira yekufambisa, ichitsiva waya dzemhangura, uye inoshandiswa kuwana imba yega yega.Iyo optical access network inowanzo ine zvikamu zvitatu: optical line terminal OLT, optical network unit ONU, uye optical kugovera network ODN, umo zvakakosha zvikamu zveOLT neONU optical access network.
Chii chinonzi OLT?
Zita rakazara reOLT iOptical Line Terminal, optical line terminal.OLT is optical line terminal, uye ndiyo yepakati hofisi midziyo yekufonera.Inoshandiswa kubatanidza optical fiber trunks.Iyo inoshanda senge switch kana router mune yechinyakare 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 data yakawanikwa kune ese ONU mushandisi terminal michina kuburikidza neODN network.
Chii chinonzi ONU?
ONU ndiyo Optical Network Unit.IONU ine mabasa maviri: Sarudzo gamuchira nhepfenyuro inotumirwa neOLT, uye gamuchira mhinduro kuOLT kana data ichida kugamuchirwa;unganidza uye cache iyo Ethernet data iyo mushandisi inoda kutumira, uye itumire kuOLT zvinoenderana neyakagoverwa yekutumira hwindo Tumira iyo cached data.
Nzira dzekutumira dzeONU mune dzakasiyana FTTx network dzakasiyana zvakare.Semuenzaniso, FTTC (Fiber To The Curb): ONU inoiswa mukamuri yepakati yekombuta yenharaunda;FTTB (Fiber To The Building): ONU inoiswa mubhokisi rekusangana rekoridho;FTTH (Fiber Kumba Kumba): ONU inoiswa muvashandisi vekumba.
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.ONU inoreva optical network unit.Panogona kunge paine mamwe ma network pakati payo nemushandisi wekupedzisira.ONT chikamu chakakosha cheONU.
Ndehupi hukama huripo pakati peONU neOLT?
Iyo OLT ndiyo magumo ekutarisira, uye ONU ndiyo inogumira;iyo ONU sevhisi yekupa inounzwa kuburikidza neOLT, uye vaviri vari muukama hwatenzi-muranda.MaONU akawanda anogona kusungirirwa kuburikidza nekupatsanura pasi peOLT.
Chii chinonzi ODN?
ODN iOptical Distribution Network, inova nzira yekufambisa yekuona pakati peOLT neONU.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.
