Mumakore achangopfuura, fiber kumba (FTTH) yakatanga kukosheswa nemakambani ekufonera pasi rese, uye matekinoroji ekugonesa ari kukura nekukurumidza.Kune maviri akakosha masisitimu marudzi eFTTH Broadband yekubatanidza.Aya ndiwo Active Optical Network (AON) uye Passive Optical Network (PON).Parizvino, kutumirwa kwakawanda kweFTTH mukuronga uye kutumira kwakashandisa PON kuchengetedza mitengo yefiber.PON ichangobva kukwezva kutarisa nekuda kwemutengo wayo wakaderera uye kuita kwakanyanya.Muchinyorwa chino, tichasuma iyo ABC yePON, iyo inonyanya kusanganisira iyo yakakosha zvikamu uye ine hukama matekinoroji eOLT, ONT, ONU uye ODN.
Kutanga, zvinodikanwa kusuma muchidimbu PON.Kusiyana neAON, vatengi vakawanda vanobatanidzwa kune imwe chete transceiver kuburikidza nemuti webazi re optical fiber uye passive splitter / combiner units, iyo inoshanda zvachose mu optical domain, uye hapana magetsi muPON.Parizvino pane zviyero zviviri zvikuru zvePON: Gigabit Passive Optical Network (GPON) uye Ethernet Passive Optical Network (EPON).Nekudaro, zvisinei kuti ndeipi mhando yePON, ese ane iwo akafanana ekutanga topology.Sistimu yaro inowanzova neiyo optical line terminal (OLT) muhofisi yepakati yevanopa masevhisi uye akawanda optical network units (ONU) kana optical network terminals (ONT) padhuze nemushandisi wekupedzisira seanopatsanura.
Optical Line Terminal (OLT)
OLT inosanganisa L2/L3 switching equipment muG/EPON system.Kazhinji, midziyo yeOLT inosanganisira rack, CSM (control and switching module), ELM (EPON link module, PON card), redundant protection -48V DC power supply module kana 110/220V AC power supply module uye fan.Muzvikamu izvi, kadhi yePON uye magetsi anotsigira kupisa kupisa, asi mamwe ma modules akavakwa mukati. Basa guru reOLT nderokudzora nzira mbiri dzekufambisa kwemashoko paODN iri muhofisi yepakati.Iyo yakanyanya kureba inotsigirwa neODN kutapurirana ndeye 20 km.OLT ine nzira mbiri dzinoyangarara: kumusoro (kuwana mhando dzakasiyana dze data uye izwi traffic kubva kune vashandisi) uye yakadzika (kutora data, izwi uye vhidhiyo traffic kubva ku metro kana kure-kure network, uye kuitumira kune ese maONT pa network Module) ODN.
Optical Network Unit (ONU)
ONU inoshandura zviratidzo zvemaziso zvinotapurirwa kuburikidza neoptical fibers kuva zviratidzo zvemagetsi.Aya masaini emagetsi anobva atumirwa kune wese mushandisi.Kazhinji, pane chinhambwe kana imwe network yekuwana pakati peONU neimba yemushandisi wekupedzisira.Pamusoro pezvo, ONU inogona kutumira, kuunganidza uye kuronga mhando dzakasiyana dze data kubva kune vatengi, uye kuitumira kumusoro kuOLT.Kuronga ndiyo maitiro ekugadzirisa uye kugadzirisa zvakare data rwizi, saka inogona kuendeswa zvakanyanya.Iyo OLT inotsigira kugoverwa kwebhanwidth, iyo inobvumira data kuti iendeswe zvakanaka kuOLT, iyo inowanzova chiitiko chinongoerekana chaitika kubva kumutengi.ONU inogona kubatanidzwa nenzira dzakasiyana-siyana uye mhando dzetambo, senge yakamonyoroka waya yemhangura, coaxial tambo, optical fiber kana Wi-Fi.
Optical Network Terminal (ONT)
Muchokwadi, iyo ONT yakangofanana neONU.ONT itemu yeITU-T, uye ONU itemu yeIEEE.Iwo ese anoreva kune mushandisi-parutivi michina muGEPON system.Asi chokwadi, maererano nenzvimbo yeONT neONU, pane misiyano pakati pawo.Iyo ONT inowanzowanikwa panzvimbo yevatengi.
Optical Distribution Network (ODN)
ODN chikamu chakakosha chePON system, inopa optical transmission medium yekubatana kwemuviri pakati peONU neOLT.Kusvika makiromita makumi maviri kana kupfuura.MuODN, tambo dzemaziso, optical connectors, passive optical splitters uye zvinhu zvinobatsira zvinoshandira pamwe.ODN ine zvikamu zvishanu, zvinova feeder fiber, optical distribution point, distribution fiber, optical access point uye fibre iri kuuya.Iyo faibha yekudyisa inotangira kubva kuOptical Distribution frame (ODF) muhofisi yepakati (CO) yekufonera kamuri uye inogumira panzvimbo yekugovera mwenje yekuvhara kureba.Iyo fiber yekugovera kubva kune optical distribution point kusvika kune optical access point inogovera optical fiber kunzvimbo iri pedyo nayo.Kuiswa kwefiber optical kunobatanidza nzvimbo yekupinda kune iyo terminal (ONT) kuitira kuti optical fiber ipinde mumba memushandisi.Pamusoro pezvo, ODN inzira yakakosha yekufambiswa kwedata yePON, uye hunhu hwayo hunobata zvakananga kuita, kuvimbika uye scalability yePON system.
Nguva yekutumira: Zvita-31-2021