Mumakore achangopfuura, fiber to the home (FTTH) yakatanga kukosheswa nemakambani ekutaurirana pasi rese, uye matekinoroji anogonesa ari kukura nekukurumidza. Kune mhando mbiri dzakakosha dzekubatanidza FTTH broadband. Idzi ndiActive Optical Network (AON) nePassive Optical Network (PON). Kusvika pari zvino, maFTTH akawanda anoshandiswa mukuronga nekuisa maPON akashandisa PON kuchengetedza mari yefiber. PON yave kukwezva kutariswa munguva pfupi yapfuura nekuda kwemutengo wayo wakaderera uye kushanda kwayo kwepamusoro. Muchinyorwa chino, tichazivisa ABC yePON, iyo inonyanya kusanganisira zvikamu zvekutanga uye matekinoroji ane hukama eOLT, ONT, ONU neODN.
Kutanga, zvakakosha kuisa PON muchidimbu. Kusiyana neAON, vatengi vakawanda vanobatanidzwa kune transceiver imwe chete kuburikidza nemuti webazi re optical fiber uye passive splitter/combiner units, dzinoshanda zvizere munzvimbo ye optical, uye hapana magetsi muPON. Parizvino kune zviyero zviviri zvikuru zvePON: Gigabit Passive Optical Network (GPON) uye Ethernet Passive Optical Network (EPON). Zvisinei, zvisinei nerudzi rwePON, dzese dzine topology imwechete. Sisitimu yayo inowanzo kuve ne optical line terminal (OLT) muhofisi yepakati yemupi webasa uye akawanda optical network units (ONU) kana optical network terminals (ONT) pedyo nemushandisi wekupedzisira se optical splitters.
Chiteshi cheOptical Line (OLT)
OLT inobatanidza michina yekushandura yeL2/L3 muG/EPON system. Kazhinji, michina 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 nefeni. Muzvikamu izvi, PON card nepower supply zvinotsigira hot swapping, nepo mamwe mamodule akavakirwa mukati. Basa guru reOLT nderekudzora kutumirwa kwemashoko nenzira mbiri paODN iri muhofisi yepakati. Daro guru rinotsigirwa neODN transmission i20 km. OLT ine nzira mbiri dzinoyangarara: kumusoro (kuwana mhando dzakasiyana dzedata uye traffic yezwi kubva kuvashandisi) uye pasi (kuwana data, traffic yezwi nemavhidhiyo kubva kuma network emetro kana kure, uye kuitumira kune ese maONT ari panetwork Module) ODN.
Chikwata cheOptical Network (ONU)
ONU inoshandura masaini ekuona anotumirwa kuburikidza neshinda dzeoptical kuita masaini emagetsi. Masaini aya emagetsi anozotumirwa kumushandisi wega wega. Kazhinji, pane daro kana imwe network yekupinda pakati peONU neimba yemushandisi wekupedzisira. Pamusoro pezvo, ONU inogona kutumira, kuunganidza uye kuronga mhando dzakasiyana dzedata kubva kuvatengi, uye kuitumira kumusoro kuOLT. Kuronga inzira yekugadzirisa nekugadzirisazve ruzivo rwedata, kuitira kuti rukwanise kuendeswa zvinobudirira. OLT inotsigira kugoverwa kwebandwidth, iyo inobvumira data kutamiswa zvakanaka kuOLT, iyo inowanzova chiitiko chisingatarisirwi kubva kumutengi. ONU inogona kubatanidzwa nenzira dzakasiyana-siyana uye mhando dzetambo, dzakadai se twisted pair copper wire, coaxial cable, optical fiber kana Wi-Fi.
Chiteshi cheOptical Network (ONT)
Kutaura zvazviri, ONT yakafanana neONU. ONT izwi reITU-T, uye ONU izwi reIEEE. Ose anoreva michina inoshandiswa nevashandisi muGEPON system. Asi kutaura chokwadi, zvichienderana nenzvimbo yeONT neONU, pane musiyano pakati pawo. ONT inowanzo kuwanikwa panzvimbo yevatengi.
Network yekugovera yeOptical (ODN)
ODN chikamu chakakosha chePON system, iyo inopa nzira yekutumira optical yekubatanidza pakati peONU neOLT. Nzvimbo yekusvika ndeye makiromita makumi maviri kana kupfuura. MuODN, tambo dze optical, optical connectors, passive optical splitters uye assistant components zvinoshanda pamwe chete. ODN ine zvikamu zvishanu, zvinoti feeder fiber, optical distribution point, distribution fiber, optical access point uye incoming fiber. feeder fiber inotangira pa optical distribution frame (ODF) mu central office (CO) telecommunication room uye inoguma panzvimbo yekugovera chiedza kuti ifukidzwe kure. Distribution fiber kubva panzvimbo yekugovera optical kusvika panzvimbo yekusvitsa optical inogovera optical fiber kunzvimbo iri pedyo nayo. Kuunzwa kwe optical fiber kunobatanidza optical access point ne terminal (ONT) kuitira kuti optical fiber ipinde mumba memushandisi. Pamusoro pezvo, ODN inzira inokosha yekutumira data rePON, uye hunhu hwayo hunokanganisa zvakananga mashandiro, kuvimbika uye scalability yePON system.
Nguva yekutumira: Zvita-31-2021