Ko te WDM PON he whatunga whatu hāngū ira-ki-ira ma te whakamahi i te hangarau whakawehenga roangaru. Arā, i roto i te muka kotahi, ko te maha o nga roangaru e whakamahia ana i nga taha e rua he nui atu i te 3, a ko te whakamahi i te hangarau whakahiato wehenga roangaru ki te whakatutuki i te uru ki runga ka taea te whakarato i te bandwidth mahi nui atu i te utu iti, he huarahi whanaketanga nui mo te uru muka Optical a meake nei. Ko te punaha WDM PON e toru nga waahanga: Optical Line Terminal (OLT), Whatunga Ngaru Ngaru Tohaina (OWDN) me te Waenga Whatunga Whatu (ONU: Waehanga Whatunga Optical), e whakaatuhia ana i te Whakaahua 1.OLTKo te taputapu tari pokapū, tae atu ki te roangaru whatu wehenga multiplexer/demultiplexer (OM/OD). Ko te tikanga, kei a ia nga mahi penei i te whakahaere, te whakawhiti, me te whakahaere. Ko te OM/OD o te tari pokapū ka taea te wehe-a-tinana mai i teOLTtaputapu. E tohu ana te OWDN ki te whatunga whatu kei waenganui i teOLTme teONU, me te mohio ki te tohatoha roangaru mai i teOLTki teONUmai ranei i teONUki teOLT. Kei roto i te hononga-a-tinana te muka whangai me te node mamao haungi (PRN: Passive Remote Node). Kei roto i te PRN te nuinga o te waariki te whakakakahu i te kupenga ngaru (AAWG: Athermal Arrayed Waveguide Grating). Ko te AAWG he taputapu whatu haungaru-tairongo e mahi ana i nga mahi whakareatanga roangaru me nga mahi demultiplexing. Ko teONUka whakanohoia ki te tauranga kaiwhakamahi, he taputapu tauranga whatu kei te taha o te kaiwhakamahi.
I te ahunga whakararo, he maha nga roangaru rereke ld1…ldn ka tukuna ki te OWDN i muri i te OM/OD multiplexing o te tari matua, ka tohaina ki ia.ONUe ai ki nga roangaru rereke. I te ahunga whakarunga, rereke te kaiwhakamahiNga ONUtuku i nga roangaru whatu rereke lu1… lun ki te OWDN, multiplex i te PRN o te OWDN, ka tuku ki teOLT. Whakaotia te tukunga whakarunga me te tukunga o nga tohu whatu. I roto i a raatau, ko te ldn roangaru whakararo me te lun roangaru whakarunga ka taea te mahi i roto i te riipene ngaru kotahi, i nga riu ngaru rereke ranei.