I roto i te ao o ngā whatunga whānui, e rua ngā hangarau rongonui kua noho hei whakataetae matua ki te whakarato ratonga Ipurangi tere-tiketike: ko te EPON me te GPON. Ahakoa he rite tonu ngā mahi a te tokorua, he rerekētanga motuhake kei a rāua e tika ana kia tūhuratia kia mārama ai ō rāua kaha, kia whakatau ai ko tēhea te mea e pai ana mō ō hiahia.
EPON (Ethernet Passive Optical Network) me te GPON (Gigabit Passive Optical Network), he tikanga rongonui ēnei mō te tohatoha hononga Ipurangi tere-teitei ki ngā kaiwhakamahi mā te whakamahi i te hangarau muka whatu. He wāhanga rāua nō te whānau hangarau Passive Optical Network (PON); heoi, he rerekē te hoahoa me te mahi.
Ko te rerekētanga matua i waenga i te EPON me te GPON ko tā rāua paparanga mana uru pāpāho (MAC). Ka whakamahia e te EPON te Ethernet, te hangarau kotahi e whakamahia ana i roto i ngā whatunga rohe (LAN) me ngā whatunga rohe whānui (WAN). Mā te whakamahi i te Ethernet, ka whakaratohia e te EPON te hototahitanga ki ngā pūnaha Ethernet o nāianei, ka waiho hei kōwhiringa tino ngāwari mō ngā kaiwhakahaere whatunga.GPON, i tētahi atu ringa, ka whakamahia e te hangarau Aratau Whakawhiti Asynchronous (ATM), he tikanga tuku raraunga tawhito engari e whakamahia whānuitia ana. Ko te painga o te whakamahi i te ATM i roto i te whatunga GPON ko tana kaha ki te whakarato ratonga takaro-toru (reo, ataata me te raraunga) i runga i te tūāpapa whakarea wehewehe, kia pai ai te whakamahinga o te whānui o te raraunga.
Ko tētahi atu rerekētanga nui ko te tere tuku iho me te tere tuku iho. Ko te tikanga he rite tonu te tere o te EPON, arā, he rite tonu te tere tango me te tukuake. He rerekē, ka whakamahia e te GPON he tautuhinga kore-rite e taea ai te tere iho teitei ake me te tere tuku iho iti iho. Nā tēnei āhuatanga ka pai te GPON mō ngā tono e hiahia ana ki te tere tango tere ake, pērā i te roma ataata me ngā whakawhiti kōnae nui. He rerekē, nā te tere rite o te EPON ka pai ake mō ngā tono e whakawhirinaki nui ana ki te tuku raraunga rite, pērā i te hui ataata me ngā ratonga kapua.
Ahakoa e tautokona ana e te EPON me te GPON te hanganga muka kotahi, he rerekē ngā hangarau OLT (Optical Line Terminal) me te ONT (Optical Network Terminal). Ka taea e te GPON te tautoko i te maha o ngā ONT mō ia OLT, koia te kōwhiringa tuatahi ina he āwangawanga te tauine. I tētahi atu taha, he roa ake te whānuitanga o te EPON, e āhei ai ngā kaiwhakahaere whatunga ki te whakawhānui ake i te hononga mai i te tari matua, i te wāhi tohatoha rānei. Mā tēnei āhuatanga ka whai hua te EPON mō te kapi i ngā rohe whenua whānui.
Mai i te tirohanga utu, he rerekē ngā utu whakatūnga tuatahi o EPON me GPON. Nā te hanganga ATM, me nui ake te utu o ngā taputapu e hiahiatia ana e GPON. He rerekē, ka whakamahia e EPON te hangarau Ethernet, he mea whānuitia te whakamahi, ā, he iti te utu. Heoi, he mea tika kia mōhiotia, i te whakapai ake o te hangarau, me te nui haere o ngā kaiwhakarato e uru mai ana ki te mākete, ka āta whakawhāitihia te rerekētanga utu i waenga i ngā kōwhiringa e rua.
Hei whakarāpopototanga, he kōwhiringa pai a EPON me GPON mō te whakarato hononga Ipurangi tere-teitei. Nā te hototahi o EPON ki a Ethernet me ngā tere ōrite, he mea ātaahua mō ngā tono umanga me ngā tono kāinga e hiahia ana ki te tuku raraunga taurite. I tētahi atu taha, ko te whakamahinga a GPON i ngā tere ATM me ngā tere kore ōrite he mea whiriwhiri tuatahi mō ngā tono e hiahia ana ki ngā tere tango tere ake. Mā te mārama ki ngā rerekētanga i waenga i a EPON me GPON ka āwhina i ngā kaiwhakahaere whatunga me ngā kaiwhakamahi mutunga ki te whakatau whai whakaaro i te wā e whiriwhiri ana i te hangarau e pai ana ki ā rātou whakaritenga.
Wā tuku: Oketopa-19-2023