He aha te AON?
Ko te AON he whatunga whatu kaha, te nuinga o te tango i te hoahoanga whatunga tohu-ki-te-ira (PTP), a ka taea e ia kaiwhakamahi he raina muka whatu kua whakatapua. Ko te whatunga whatu kaha e pa ana ki te whakatakotoranga opouara, whakahiato whakahiato, taputapu whatu kaha me etahi atu taputapu whakawhiti i waenga i nga taputapu tari pokapū me nga waeine tohatoha kaiwhakamahi i te wa o te tuku tohu. Ko enei taputapu whakawhiti ka peia e te hiko hei whakahaere i te tohatoha tohu me nga tohu tohu mo nga kaihoko motuhake. Ko nga taputapu whatu hohe ko te puna marama (taiaho), te kaiwhiwhi whatu, te kōwae transceiver whatu, te whakakaha whatu (whakakaha muka me te whakakaha whatu semiconductor).
He aha te PON?
Ko te PON he Whatunga Optical Passive, he hanganga whatunga tohu-ki-maha, a ko te hangarau matua mo te FTTB / FTTH. Ko te whatunga whatu hāngū e pā ana ki te ODN (whatunga tohatoha whatu) ka whakamahi noa i nga muka whatu me nga waahanga hāngū, me whakamahi noa i nga taputapu ora i te puna tohu me te mutunga whiwhi tohu. I roto i te punaha PON angamaheni, ko te wehenga whatu te matua, a ka whakamahia te wehenga whatu ki te wehe me te kohikohi i nga tohu tohu ka tukuna ma te whatunga. Ko enei wehenga mo te PON he takirua. I te ahunga o raro, he maha nga ratonga penei i te raraunga IP, te reo, me te ataata ka tohatohahia e teOLTkei roto i te tari pokapū i roto i te aratau haapurororaa i roto i te 1:N whatiwhati whatu hāngū i roto i te ODN Ki te katoaONUwae i runga i te PON; i te ahunga whakarunga, he maha nga korero ratonga mai ia tangataONUka honoa ki te muka whatu kotahi na roto i te whakakotahitanga whatu 1:N hāngū i roto i te ODN me te kore e pokanoa tetahi ki tetahi, ka mutu ka tukuna ki teOLTi te tari matua mo te mutunga powhiri.
Kei roto i te whatunga whatu hāngū he kāpeka raina whatu (OLT) i whakauruhia ki te teihana whakahaere pokapū, me te roopu o nga waeine whatunga whatu (Nga ONU) kua whakauruhia ki te pae kaiwhakamahi. Ko te whatunga tohatoha whatu (ODN) i waenganui i teOLTme teONUkei roto i nga muka whatu me nga whakawehe hāngū, hononga hono ranei. Kua wehea te PON ki nga paerewa hangarau e toru: APON (ATM PON), APON (ATM PON), Ethernet-based EPON (Ethernet PON), me te GPON (Gigabit PON) i runga i te General Frame Protocol.
I roto i te whatunga AON, he raina muka whatu kua whakatapua e te kaiwhakamahi, he mea ngawari mo te tiaki whatunga i muri mai, te whakawhänui i te kaha, te whakahou whatunga, me etahi atu, i tua atu, ko te whatunga AON e hipoki ana i te whanui o te 100 kiromita; te whatunga PON te tikanga iti ki te muka whatu taura ki runga ki te 20 kiromita. Ko te AON te nuinga o te arahi i nga tohu tohu ma roto i nga taputapu hohe, a ka whakamahia e te PON nga taputapu hāngū kaore he hiko, ka nui ake nga utu mo te tuku whatunga AON i te PON.