Iyo optical access network inzvimbo yekuwana iyo inoshandisa mwenje senzira yekufambisa, pachinzvimbo chewaya dzemhangura, uye inoshandiswa kuwana imba yega yega.Optical access network.Optical access network kazhinji ine zvikamu zvitatu: optical line terminal OLT, optical network unit ONU, optical distribution network ODN, pakati payo OLT neONU ndiwo akakosha ekuona network.
Chii chinonzi OLT?
Zita rakazara reOLT iOptical Line Terminal, optical line terminal.Iyo OLT ndeye optical line terminal uye yepakati hofisi midziyo yekufonera.Inoshandiswa kubatanidza optical fiber trunk mitsara.Iyo inoshanda senge switch kana router mune yechinyakare kutaurirana network.Icho chigadziro pamusuwo wekunze network uye kupinda kwemukati network.Yakaiswa pahofisi yepakati, iyo inonyanya kukosha mabasa ekutonga kurongeka kwetraffic, buffer control, uye kupihwa kwemushandisi-inotungamirwa passive optical network interfaces uye bandwidth kugoverwa.Kuzvitaura zviri nyore, kuita mabasa maviri.Kune iyo yekumusoro, inopedzisa kukwira kumusoro kwePON network;kune yakadzika, iyo data yakawanikwa inotumirwa uye kugoverwa kune ese ONU mushandisi terminal zvishandiso kuburikidza neODN network.
Chii chinonzi ONU?
ONU iOptical Network Unit.ONU ine mabasa maviri: inosarudza kugamuchira nhepfenyuro inotumirwa neOLT, uye inopindura kuOLT kana data ichida kugamuchirwa;inounganidza uye inovhara data yeEthernet iyo mushandisi inoda kutumira, uye inotumira kuOLT zvinoenderana nehwindo rekutumira rakapihwa Tumira data rakachengetwa.
Mumutambo weFTTx, nzira dzakasiyana dzekuendesa ONU dzekuwana dzakasiyana zvakare, dzakadai seFTTC (Fiber To The Curb): ONU inoiswa mukamuri yepakati yekombuta yenharaunda;FTTB (Fiber KuChivakwa): ONU yakaiswa mukoridho FTTH (Fiber Kumba Kumba): ONU inoiswa mumusha mushandisi.
Chii chinonzi ONT?
ONT ndiyo Optical Network Terminal, iyo yakanyanya terminal unit yeFTTH, inowanzozivikanwa se "optical modem", iyo yakafanana neyemagetsi modem ye xDSL.ONT ndeye optical network terminal, iyo inoshandiswa kune yekupedzisira mushandisi, nepo ONU ichireva optical network unit, uye panogona kunge paine mamwe ma network pakati payo nemushandisi wekupedzisira.ONT chikamu chakakosha cheONU.
Ndehupi hukama huripo pakati peONU neOLT?
Iyo OLT ndiyo nzvimbo yekutarisira, uye iyo ONU ndiyo yekupedzisira;kushandiswa kwesevhisi kweONU kunopihwa kuburikidza neOLT, uye vaviri vari muukama hwatenzi-muranda.Multiple ONUs inogona kubatanidzwa kune imwe OLT kuburikidza ne splitter.
Chii chinonzi ODN?
ODN is Optical Distribution Network, optical distribution network, ndiyo optical transmission physical channel pakati peOLT neONU, basa guru nderekupedzisa nzira mbiri dzekufambisa kwemasignal signals, kazhinji nemaoptical fiber cables, optical connectors, optical splitters uye kuiswa kune batanidza izvi Chikamu chemudziyo chinotsigira midziyo, iyo inonyanya kukosha chikamu ndeye optical splitter.
Nguva yekutumira: Oct-15-2021