OLT tashar tashar sadarwa ce ta gani, ONU naúrar hanyar sadarwa ce ta gani (ONU), dukkansu kayan haɗin sadarwar gani ne.Nau'o'i biyu ne masu mahimmanci a cikin PON: PON (Passive Optical Network: passive Optical Network).PON (cibiyar sadarwar gani mara kyau) tana nufin (cibiyar rarraba gani na gani) baya ƙunshe da kowane na'urorin lantarki da wutar lantarki, ODN ta ƙunshi na'urori marasa amfani kamar na'urar rarrabawar gani (Splitter), baya buƙatar kayan aikin lantarki masu tsada.Cibiyar sadarwa na gani mai wucewa ta haɗa da tashar tashar layin gani (OLT) da aka shigar a tashar sarrafawa ta tsakiya, da kuma rukunin masu tallafawa raka'o'in cibiyar sadarwa na gani (ONUs) da aka shigar a wurin mai amfani.Cibiyar rarrabawar gani (ODN) tsakanin OLT da ONU tana ƙunshe da filaye na gani da masu rarrabawa ko ma'aurata.
Masu ba da hanya tsakanin hanyoyin sadarwa da masu sauyawa kayan aikin musayar bayanai ne.
ODN (Network Distribution Network) cibiyar sadarwa ce ta kebul na gani na FTTH bisa kayan aikin PON.Matsayinta shine samar da tashar watsawa ta gani tsakanin OLT da ONU.Daga ra'ayi na aiki, ODN za a iya raba zuwa sassa hudu: na'ura mai ba da hanya tsakanin hanyoyin sadarwa na USB, na'ura mai ba da hanya tsakanin hanyoyin sadarwa na USB, da na cikin gida na USB Tantancewar na USB subsystem da Tantancewar fiber m subsystem daga ofishin karshen zuwa karshen mai amfani.
ONT wani bangare ne na ONU.
FTTB "fiber na gani zuwa ginin", 16 ONU ana sanya su a cikin akwatin naúrar a cikin corridor.Akwai ONT 16 a cikin ONU.Kowane ONT yana fitar da kebul na cibiyar sadarwa (siginar lantarki) kuma ya kai kowane ƙarshen mai amfani ta hanyar kebul na cibiyar sadarwa a cikin corridor.
FTTH “fiber-to-the-gida”, saka 1 zuwa 16 splitter a cikin akwatin naúrar a cikin corridor, sannan isa ga kowane mai amfani ta cikin fiber da aka rufe a cikin corridor, kuma kowane mai amfani yana ƙare ONT.Daidai ne da tarwatsa ONU, ta yadda kayan aikin tasha ya kasance kusa da mai amfani mara iyaka.
Ana iya fahimtar ONT azaman ONU mai tashar jiragen ruwa guda ɗaya kawai.