ʻO ka PON (Passive Optical Network) kahi pūnaewele ʻike passive, ʻo ia hoʻi ʻo ka ODN (optical distribution network) ma waena o nāOLT(ka laina laina optika) a me kaONU(Optical network unit) ʻaʻohe mea hana, a hoʻohana wale i nā fiber optical a me nā ʻāpana passive. Hoʻohana nui ʻo PON i ka ʻōnaehana pūnaewele point-to-multipoint, ʻo ia ka ʻenehana nui e ʻike ai i ka FTTB/FTTH.
Loaʻa i ka ʻenehana PON ka nui o nā ʻike, a hoʻonui mau ʻia. ʻO ka hoʻomohala ʻana o ka ʻenehana xPON mai APON, BPON, a ma hope GPON a me EPON. ʻO kēia nā ʻenehana o nā ʻano hoʻoili like ʻole a me nā kūlana hoʻouna i kūkulu ʻia i nā manawa like ʻole.
He aha ka EPON?
ʻO EPON (Ethernet Passive Optical Network) he Ethernet passive optical network. Hoʻokumu ʻia ʻo EPON ma ka ʻenehana PON o Ethernet, kahi e hui pū ai i nā pono o ka ʻenehana PON a me ka ʻenehana Ethernet. Hoʻohana ia i ka hoʻolālā point-to-multipoint a me ka passive optical fiber transmission e hāʻawi i nā lawelawe he nui ma luna o Ethernet. Ma muli o ka hoʻokele waiwai a me ka maikaʻi o ka EPON, ʻo ia ke ala kamaʻilio maikaʻi loa e ʻike ai i nā "ʻekolu pūnaewele i hoʻokahi" a me "mile hope".
He aha ka GPON?
ʻO GPON (Gigabit-Capable Passive Optical Network) he Gigabit passive optical network a i ʻole Gigabit passive optical network. ʻOkoʻa nā kūlana i hāpai ʻia e EPON a me GPON. Hiki ke ʻōlelo ʻia ʻoi aku ka holomua o ka GPON a hiki ke hoʻouna i ka bandwidth hou aʻe, a hiki ke lawe mai i nā mea hoʻohana hou aʻe ma mua o EPON. ʻOiai ʻoi aku ka maikaʻi o ka GPON ma mua o EPON ma nā kumukūʻai kiʻekiʻe a me nā lawelawe he nui, ʻoi aku ka paʻakikī o ka ʻenehana o GPON a ʻoi aku kona kumukūʻai ma mua o EPON. No laila, i kēia manawa, ʻo EPON a me GPON nā ʻenehana me nā noi ākea ākea PON. ʻO ka ʻenehana e koho ai e pili ana i ke kumukūʻai o ke komo ʻana i ka fiber optical a me nā koi ʻoihana. E ʻoi aku ka maikaʻi o ka GPON no nā mea kūʻai aku me ka bandwidth kiʻekiʻe, multi-service, QoS a me nā koi palekana a me ka ʻenehana ATM e like me ka iwi kuamoʻo. ʻO ka hoʻomohala e hiki mai ana ka bandwidth kiʻekiʻe. No ka laʻana, ua hoʻomohala ka ʻenehana EPON / GPON i 10 G EPON / 10 G GPON, a e hoʻomaikaʻi hou ʻia ka bandwidth.
Ke hoʻomau nei ka hoʻonui ʻana i ka mana o nā mea hoʻolako pūnaewele, pono e hoʻonui ʻia ka versatility o nā ʻoihana e hoʻokō i kēia koi ulu. ʻO ka Fiber-to-the-home (FTTH) passive optical network (PON) ʻo ka ʻenehana i hoʻohana nui ʻia i kēia manawa. ʻO nā mea maikaʻi o ka ʻenehana PON ʻo ia ka mea hiki ke hōʻemi i ka noho ʻana o nā kumu waiwai fiber optical backbone a mālama i ke kālā; maʻalahi ka ʻōnaehana pūnaewele a ikaika ka hiki ke hoʻonui; he haʻahaʻa ka haʻahaʻa haʻahaʻa o nā hāmeʻa passive optical, a ʻaʻole maʻalahi ke keʻakeʻa ʻia e ke kaiapuni o waho; a ikaika ka hiki ke kākoʻo ʻoihana.