OLT is an optical line terminal, ONU is an optical network unit (ONU), ese ari optical transmission network yekubatanidza michina.Iwo ma module maviri anodiwa muPON: PON (Passive Optical Network: passive optical network).PON (passive optical network) inoreva (optical distribution network) haina chero zvigadzirwa zvemagetsi uye magetsi emagetsi, ODN inoumbwa nemidziyo yepasi senge optical splitter (Splitter), haidi inodhura inoshanda inoshanda zvemagetsi.A passive optical network inosanganisira optical line terminal (OLT) yakaiswa pacentral control station, uye batch yekutsigira optical network units (ONUs) yakaiswa panzvimbo yemushandisi.Iyo optical distribution network (ODN) pakati peOLT neONU ine optical fibers uye passive splitters kana couplers.
Router uye switches midziyo yekuchinjana data.
ODN (Optical Distribution Network) ndeye FTTH optical tambo network yakavakirwa paPON midziyo.Basa rayo nderekupa nzira yekufambisa yekuona pakati peOLT neONU.Kubva pakuona kwekushanda, ODN inogona kukamurwa kuita zvikamu zvina: iyo feeder optical tambo subsystem, yekugovera optical tambo subsystem, yemukati tambo optical tambo subsystem uye optical fiber terminal subsystem kubva kuhofisi kumagumo kusvika kumushandisi.
ONT chikamu chakakosha cheONU.
FTTB "optical fiber kuchivako", 16 ONUs inoiswa mubhokisi reyuniti mumukoto.Kune gumi nematanhatu ONT muONU.Imwe neimwe ONT inoburitsa tambo yetiweki (chiratidzo chemagetsi) uye inosvika kumagumo emushandisi kuburikidza netiweki tambo mukoridho.
FTTH "fiber-to-the-home", isa 1 kusvika ku16 splitter muyuniti bhokisi mukoridho, uye wobva wasvika mushandisi wega wega kuburikidza nefiber yakavharwa mukoridho, uye mushandisi wega wega anogumisa ONT.Izvo zvakaenzana nekubvisa iyo ONU, kuitira kuti mudziyo wekupedzisira uri padyo nemushandisi.
ONT inogona kunzwisiswa seONU ine chiteshi chimwe chete.