I-OLT iyitheminali ye-optical line, i-ONU iyiyunithi yenethiwekhi ye-optical (ONU), zonke ziyimishini yokuxhuma inethiwekhi yokudlulisa amehlo.Kungamamojula amabili adingekayo ku-PON: I-PON (Inethiwekhi ye-Passive Optical: inethiwekhi yokubona engenzi lutho).I-PON (inethiwekhi ye-passive optical) ibhekisela ku (inethiwekhi yokusabalalisa optical) ayiqukethe noma yiziphi izisetshenziswa zikagesi namandla kagesi, i-ODN yakhiwe ngamadivayisi angenzi lutho njenge-optical splitter (Splitter), ayidingi imishini kagesi esebenzayo ebizayo.Inethiwekhi ye-passive optical ihlanganisa itheminali yomugqa wokubona (OLT) efakwe esiteshini sokulawula esimaphakathi, kanye neqoqo lamayunithi asekelayo enethiwekhi yokubona (ama-ONU) afakwe kusayithi lomsebenzisi.Inethiwekhi yokusabalalisa okubonakalayo (i-ODN) phakathi kwe-OLT ne-ONU iqukethe imicu yokubona kanye nezihlukanisi noma ama-couplers.
Amarutha namaswishi ayisisetshenziswa sokushintshana kwedatha.
I-ODN (Optical Distribution Network) iyinethiwekhi yekhebula ye-FTTH esekelwe kumishini ye-PON.Indima yayo ukuhlinzeka ngeshaneli yokudlulisa amehlo phakathi kwe-OLT ne-ONU.Ngokombono wokusebenza, i-ODN ingahlukaniswa ibe izingxenye ezine: i-subsystem yekhebula ye-feeder optical, i-subsystem yekhebula lokusabalalisa, i-subsystem yekhebula yangaphakathi yekhebula kanye ne-subsystem ye-fiber optical terminal kusukela ekupheleni kwehhovisi kuya ekugcineni komsebenzisi.
I-ONT iyingxenye ebalulekile ye-ONU.
I-FTTB “fiber optical to the building”, ama-ONU angu-16 afakwa ebhokisini leyunithi emhubheni.Kunama-ONT ayi-16 ku-ONU.I-ONT ngayinye ikhipha ikhebuli yenethiwekhi (isignali kagesi) futhi ifinyelela ekugcineni komsebenzisi ngamunye ngentambo yenethiwekhi ephaseji.
I-FTTH “fiber-to-the-home”, ibeka isihlukanisi esingu-1 kuye ku-16 ebhokisini leyunithi emhubheni, bese ifinyelela kumsebenzisi ngamunye ngefayibha emboziwe ephaseji, futhi umsebenzisi ngamunye unqamula i-ONT.Kulingana nokudiliza i-ONU, ukuze okokusebenza kwetheminali kusondele kakhulu kumsebenzisi.
I-ONT ingaqondwa njenge-ONU enechweba elilodwa kuphela.