OLT ndi optical line terminal, ONU ndi optical network unit (ONU), onse ndi zida zolumikizirana ndi netiweki.Ndi ma module awiri ofunikira mu PON: PON (Passive Optical Network: passive Optical network).PON (passive Optical network) amatanthauza (optical distribution network) ilibe zipangizo zamagetsi ndi magetsi, ODN imapangidwa ndi zipangizo zamakono monga optical splitter (Splitter), sikutanthauza zipangizo zamagetsi zotsika mtengo.Network optical network imaphatikizapo optical line terminal (OLT) yomwe imayikidwa pamalo owongolera apakati, ndi gulu lothandizira ma unit optical network (ONUs) omwe amayikidwa patsamba la ogwiritsa ntchito.The optical distribution network (ODN) pakati pa OLT ndi ONU ili ndi ma optical fibers ndi passive splitters kapena couplers.
Ma routers ndi ma switch ndi zida zosinthira deta.
ODN (Optical Distribution Network) ndi FTTH kuwala chingwe netiweki zochokera PON zida.Ntchito yake ndikupereka njira yolumikizira kuwala pakati pa OLT ndi ONU.Kuchokera pamawonedwe ogwirira ntchito, ODN ikhoza kugawidwa m'magawo anayi: gawo laling'ono lamagetsi lamagetsi, gawo laling'ono logawa, chingwe chamkati chamkati, chingwe chamkati chamkati ndi makina opangira ma fiber terminal kuchokera kumapeto kwa ofesi mpaka kumapeto kwa wogwiritsa ntchito.
ONT ndi gawo lofunikira la ONU.
FTTB "optical fiber to the building", 16 ONUs amaikidwa mu bokosi la unit mu korido.Pali ma ONT 16 mu ONU.ONT iliyonse imatulutsa chingwe cha netiweki (chizindikiro chamagetsi) ndikufikira kumapeto kwa wogwiritsa ntchito kudzera pa chingwe cha netiweki pakhonde.
FTTH "fiber-to-the-home", ikani 1 mpaka 16 ziboda mu bokosi unit mu khonde, ndiyeno kufika aliyense wosuta kudzera CHIKWANGWANI yokutidwa mu kanjira, ndi wosuta aliyense kuthetsa ndi ONT.Ndizofanana ndi kugwetsa ONU, kuti zida zogwiritsira ntchito zizikhala pafupi kwambiri ndi wogwiritsa ntchito.
ONT ikhoza kumveka ngati ONU yokhala ndi doko limodzi lokha.