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 terminal OLT, optical network unit ONU, ndi optical distribution network ODN, momwe zigawo zikuluzikulu za OLT ndi ONU Optical access network.
Kodi OLT ndi chiyani?
Dzina lonse la OLT ndi Optical Line Terminal, optical line terminal.OLT ndi optical line terminal, ndipo ndi chapakati ofesi zida za telecommunication.Amagwiritsidwa ntchito kulumikiza mitengo ikuluikulu ya optic fiber.Imagwira ntchito ngati chosinthira kapena rauta mu netiweki 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 kutsika, imatumiza zomwe zapezedwa ku zida zonse za ONU zogwiritsa ntchito kudzera pa netiweki ya ODN.
Kodi ONU ndi chiyani?
ONU ndi Optical Network Unit.ONU ili ndi ntchito ziwiri: Mwasankha kulandira mauthenga otumizidwa ndi OLT, ndi kulandira yankho ku OLT ngati deta ikufunika kulandiridwa;sonkhanitsani ndikusunga deta ya Efaneti yomwe wogwiritsa ntchito akufunika kutumiza, ndikutumiza ku OLT malinga ndi zenera lotumizira lomwe laperekedwa Tumizani deta yosungidwa.
Njira zotumizira ma ONU mumitundu yosiyanasiyana ya FTTx ndizosiyananso.Mwachitsanzo, FTTC (Fiber To The Curb): ONU imayikidwa m'chipinda chapakati cha makompyuta cha anthu ammudzi;FTTB (Fiber to The Building): ONU imayikidwa mu bokosi lolowera panjira;FTTH (Fiber To The Home): ONU imayikidwa 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.ONU imatanthawuza gawo la optical network.Pakhoza kukhala maukonde ena pakati pake ndi wogwiritsa ntchito.ONT ndi gawo lofunikira la ONU.
Kodi pali ubale wotani pakati pa ONU ndi OLT?
OLT ndiye mathero a kasamalidwe, ndipo ONU ndiye pothera;ntchito za ONU zimaperekedwa kudzera mu OLT, ndipo awiriwa ali paubwenzi wa mbuye ndi akapolo.Ma ONU angapo amatha kupachikidwa kudzera mu chogawa pansi pa OLT.
Kodi ODN ndi chiyani?
ODN ndi Optical Distribution Network, yomwe ndi njira yolumikizirana pakati pa OLT ndi ONU.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.
