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 wehewehenga roangaru ki te whakatutuki i te uru ki runga ka taea te whakarato i te bandwidth mahi nui ake i te utu iti, he mea nui te ahunga whanaketanga mo te uru muka Optical a meake nei.E toru nga waahanga o te punaha WDM PON: Optical Line Terminal (OLT), Optical Wavelength Distribution Whatunga (OWDN) me te Waehanga Whatunga Optical (ONU: Optical Whatunga Waehanga), e whakaatuhia ana i te Whakaahua 1. Ko te OLT te taputapu tari matua, tae atu ki whatu whatu wavelength division 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 nga taputapu OLT.Ko te OWDN e pa ana ki te whatunga whatu kei waenganui i te OLT me te ONU, me te mohio ki te tohatoha roangaru mai i te OLT ki te ONU mai i te ONU ki te OLT ranei.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 kupenga kaiarahi ngaru whakakakahu (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.Ka whakanohoia te ONU 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 ONU e ai ki nga roangaru rereke.I te ahunga whakarunga, ka tukuna e nga ONU nga kaiwhakamahi rereke nga roangaru whatu lu1…lun ki te OWDN, multiplex i te PRN o te OWDN, ka tuku ki te OLT.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.