OLTyog ib qho optical kab davhlau ya nyob twg,ONUyog ib chav tsev optical network (ONU), lawv yog tag nrho cov khoom siv kho qhov muag kis tau tus mob network. Nws yog ob qhov tsim nyog modules hauv PON: PON (Passive Optical Network: passive optical network). PON (passive optical network) yog hais txog (optical distribution network) tsis muaj cov khoom siv hluav taws xob thiab hluav taws xob hluav taws xob, ODN yog tsim los ntawm cov khoom siv tsis zoo xws li optical splitter (Splitter), tsis tas yuav siv cov khoom siv hluav taws xob kim. Passive optical network muaj xws li cov kab hluav taws xob kho qhov muag (OLT) ntsia ntawm qhov chaw nres tsheb hauv nruab nrab, thiab ib pawg ntawm kev txhawb nqa optical network units (ONUs) ntsia ntawm tus neeg siv qhov chaw. Optical distribution network (ODN) nruab nrab ntawm covOLTthiabONUmuaj cov fibers optical thiab passive splitters lossis couplers.
Routersthiabhloovyog cov khoom sib pauv ntaub ntawv.
ODN (Optical Distribution Network) yog FTTH optical cable network raws li cov khoom siv PON. Nws lub luag hauj lwm yog los muab ib tug optical kis tau tus mob channel ntawm lubOLTthiab covONU. Los ntawm qhov ua tau zoo ntawm qhov pom, ODN tuaj yeem muab faib ua plaub ntu: feeder optical cable subsystem, tis optical cable subsystem, sab hauv cable optical cable subsystem thiab optical fiber davhlau ya nyob twg subsystem los ntawm qhov chaw ua haujlwm kawg mus rau tus neeg siv kawg.
ONT yog ib feem tseem ceeb ntawmONU.
FTTB “optical fiber rau lub tsev”, 16ONUstau muab tso rau hauv lub thawv unit hauv txoj kev hauv tsev. Muaj 16 ONTs nyob rau hauvONU. Txhua ONT tso tawm ib lub network cable (hluav taws xob teeb liab) thiab ncav cuag txhua tus neeg siv kawg ntawm lub network cable hauv txoj kev hauv tsev.
FTTH "fiber-rau-lub-tsev", muab 1 txog 16 splitter rau hauv lub thawv chav tsev hauv txoj kev hauv tsev, thiab tom qab ntawd mus txog txhua tus neeg siv los ntawm cov fiber ntau hauv txoj kev hauv tsev, thiab txhua tus neeg siv txiav ONT. Nws yog sib npaug rau dismantling lubONU, kom cov khoom siv davhlau ya nyob twg yog infinitely ze rau tus neeg siv.
ONT tuaj yeem nkag siab tias yog ib qhoONUnrog ib qho chaw nres nkoj xwb.