Optical access network ndi njira yofikira yomwe imagwiritsa ntchito kuwala ngati njira yotumizira, kulowetsa mawaya amkuwa, ndipo imagwiritsidwa ntchito kuti ifike kunyumba iliyonse. Netiweki yolumikizira nthawi zambiri imakhala ndi magawo atatu: optical line terminalOLT, gulu la optical networkONU, ndi optical distribution network ODN, momwe zigawo zikuluzikulu zaOLTndiONUoptical access network.
Ndi chiyaniOLT?
Dzina lonse laOLTndi Optical Line Terminal, optical line terminal.OLTndi optical line terminal, ndipo ndi chapakati ofesi zida za telecommunication. Amagwiritsidwa ntchito kulumikiza mitengo ikuluikulu ya optic fiber. Zimagwira ntchito ngati akusintha or rautamu network yolumikizirana yachikhalidwe. Ndi chipangizo cholowera kunja kwa intaneti ndi khomo ndi kutuluka kwa intaneti yamkati. Zoyikidwa pa ofesi yapakati, ntchito zofunika kwambiri zogwirira ntchito ndikukonza magalimoto, kuwongolera ma buffer, ndikupereka mawonekedwe olumikizirana ndi ogwiritsa ntchito komanso kugawa bandwidth. Mwachidule, imagwiritsa ntchito ntchito ziwiri: kumtunda, imamaliza kumtunda kwa intaneti ya PON; ndi kunsi kwa mtsinje, izo amatumiza anapeza deta onseONUzida zogwiritsa ntchito kudzera pa netiweki ya ODN.
Ndi chiyaniONU?
ONUndi Optical Network Unit. TheONUili ndi ntchito ziwiri: Kusankha kulandira kuwulutsa kotumizidwa ndi aOLT, ndi kulandira yankho kuOLTngati deta ikufunika kulandiridwa; sonkhanitsani ndikusunga data ya Efaneti yomwe wogwiritsa ntchito akuyenera kutumiza, ndikutumiza kuOLTmalinga ndi zenera lotumizira lomwe laperekedwa Tumizani zomwe zasungidwa.
Njira zotumizira zaONUmu maukonde osiyanasiyana a FTTx nawonso ndi osiyana. Mwachitsanzo, FTTC (Fiber To The Curb):ONUimayikidwa m'chipinda chapakati cha makompyuta cha anthu ammudzi; FTTB (Fiber Kumanga):ONUimayikidwa mu bokosi lolumikizirana la korido; FTTH (Fiber Kunyumba):ONUimayikidwa mwa ogwiritsa ntchito kunyumba.
Kodi ONT ndi chiyani?
ONT ndi Optical Network Terminal, gawo lalikulu kwambiri la FTTH, lomwe limadziwika kuti "optical cat", ofanana ndi amphaka amagetsi a xDSL. ONT ndi optical network terminal ndipo imagwiritsidwa ntchito kwa ogwiritsa ntchito mapeto.ONUimatanthawuza gawo la optical network. Pakhoza kukhala maukonde ena pakati pake ndi wogwiritsa ntchito. ONT ndi gawo lofunikira laONU.
Kodi pali ubale wotaniONUndiOLT?
TheOLTndiye mapeto a kasamalidwe, ndiONUndiye terminal; ndiONUntchito zoperekedwa zimaperekedwa ndiOLT, ndipo awiriwo ali paubwenzi wa mbuye ndi kapolo. ZambiriONUakhoza kupachikidwa kupyolera mu choboola pansi paOLT.
Kodi ODN ndi chiyani?
ODN ndi Optical Distribution Network, yomwe ndi njira yakuthupi yopatsirana pakatiOLTndiONU. Ntchito yayikulu ndikumaliza kutumiza kwa bidirectional kwa ma sign optical. Nthawi zambiri izi zimalumikizidwa ndi zingwe za fiber optic, zolumikizira za kuwala, ma splitter owoneka bwino, ndikuyika. Zida zothandizira za chipangizochi zimapangidwa ndi optical splitters.
