ʻO PON (Passive Optical Network) ʻo ia hoʻi, ʻaʻohe mea hana a hoʻohana wale i ka Optical Fiber and Passive Components ma waena o OLT ( Optical Line Terminal) a me ka ONU ( Optical Network Unit). A ʻo PON i ka ʻenehana nui e hoʻokō i ka FTTB / FTTH, ka mea nui e hoʻohana i ka kikoʻī i ka hoʻolālā pūnaewele multi-point.
Nui nā ʻike ma ka ʻenehana PON, a ke hoʻomau mau nei ka PON Technology a me ka hoʻonui ʻana. Ua hoʻomohala ʻia ʻo XPON Technology mai APON, BPON, a ma hope o EPON a me GPON. Aia nā ʻano hoʻoili like ʻole a me nā kūlana hoʻouna i kūkulu ʻia i nā manawa like ʻole.
He aha ka APON?
I ka pau ʻana o nā makahiki 1990, ʻo ITU ( International Telecommunication Union ) i hoʻoholo mua i ka APON me ka hoʻohana ʻana i ka Asynchronous Transfer Mode ( ATM) no ka Packet Communication. Hoʻohana ʻo APON i ke kikowaena kikowaena a me ka helu helu helu o ATM, i hui pū ʻia me ka hana kaʻana like o ka passive divider ma ka fiber optical a me Optical Line Terminal, ka mea e hoʻohaʻahaʻa i ke kumukūʻai e 20% ~ 40% ma mua o ka ʻōnaehana komo PDH / SDH ma muli o ke kaapuni. hoʻololi.
He aha ka BPON?
Me ka hoʻomohala wikiwiki o ka ʻenehana Ethernet, ʻaʻole hoʻohana hou ʻia ʻo APON. I kēia manawa, ua manaʻo ʻia ka manaʻo o Broadband Passive Optical Network (BPON). ʻO ka BPON kahi hoʻonui o ka maʻamau APON, i kapa mua ʻia ʻo APON, akā ma hope ua hoʻololi ʻia i BPON no nā kumu like ʻole. Hoʻokumu ʻia ʻo BPON ma ka protocol ATM, me ka wikiwiki o ka upstream a me lalo o 155Mbpas a me 622Mbps. I ka manawa like, hoʻohui ia i ka hoʻokaʻawale bandwidth ikaika, pale a me nā hana ʻē aʻe, a hiki ke hāʻawi i ka Ethernet komo, ka hoʻoili wikiō, nā laina hoʻolimalima kiʻekiʻe a me nā lawelawe ʻē aʻe.
He aha ka EPON?
Ma muli o ke kumukūʻai kiʻekiʻe o ka BPON, ua hoʻololi ʻia e ka EPON.EPON (Ethernet Passive Optical Network) he Ethernet Passive Optical Network. ʻenehana Ethernet, hoʻohana i ka Point to Multi-point structure, passive optical fiber transmission,
Ma muli o ke kumukūʻai kiʻekiʻe o ka BPON, ua hoʻololi ʻia e ka EPON.EPON (Ethernet Passive Optical Network) he Ethernet Passive Optical Network. ʻO ka ʻenehana Ethernet, hoʻohana i ka Point to- Multi-point structure, passive optical fiber transmission, a hāʻawi i nā lawelawe like ʻole ma Ethernet. "mau mile hope" kamaʻilio.
He aha ka GPON?
ʻO GPON (Gigabit-Capable Passive Optical Network) he Gigabit Passive Optical Network a i ʻole Gigabit Passive Optical Network. EPON a me GPON hoʻohana i nā kūlana like ʻole, a ʻoi aku ka maikaʻi o GPON, hiki ke hoʻouna i ka bandwidth a lawe i nā mea hoʻohana ʻoi aku ma mua o EPON. pono i ka wikiwiki kiʻekiʻe a me nā lawelawe he nui i hoʻohālikelike ʻia me EPON, ʻoi aku ka paʻakikī o ka ʻenehana o GPON a ʻoi aku ka kiʻekiʻe o kona kumukūʻai ma mua o ka EPON. ʻoi aku ka nui o ka ʻenehana i ke kumukūʻai o ka loaʻa ʻana o ka fiber optical a me nā koi ʻoihana. E ʻoi aku ka maikaʻi o ka GPON i 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. , Hoʻomohala ka ʻenehana EPON / GPON i 10 G EPON / 10 G GPON, e hoʻomaikaʻi hou ʻia ka bandwidth.
ʻIke hou aku e pili ana iā APON, BPON, EPON, GPON
Ke hoʻomau nei ka hoʻonui ʻia ʻana o ka mana e koi ai i nā mea hoʻolako pūnaewele, pono e hoʻonui ʻia ka versatility o nā pūnaewele hiki ke hoʻokō i kēia koi ulu. ʻO nā mea maikaʻi o ka ʻenehana PON ʻo ia ka hiki ke hōʻemi i ka hoʻohana ʻana i nā kumu waiwai iwi kuamoʻo a mālama i ke kālā. hiki, etc.