PON yana nufin hanyar sadarwa ta fiber optic, wacce hanya ce mai mahimmanci don gudanar da ayyukan cibiyar sadarwa ta hanyar sadarwa.
Fasahar PON ta samo asali ne a shekarar 1995. Daga baya, bisa ga bambanci tsakanin Layer link Layer da na zahiri, fasahar PON ta kasa kasa a hankali zuwa APON, EPON, da GPON. Daga cikin su, an kawar da fasahar APON a kasuwa saboda tsadar ta da kuma ƙarancin bandwidth.
1, EPON
Fasahar PON na tushen Ethernet. Yana ɗaukar tsarin ma'ana-zuwa-multipoint da watsa fiber na gani na gani don samar da ayyuka da yawa akan Ethernet. An daidaita fasahar EPON ta IEEE802.3 EFM ƙungiyar aiki. A cikin wannan ma'auni, an haɗa fasahar Ethernet da PON, ana amfani da fasahar PON a cikin Layer na jiki, ana amfani da ka'idar Ethernet a cikin layin haɗin bayanai, kuma ana amfani da PON topology don gane damar Ethernet.
Fa'idodin fasahar EPON sune ƙananan farashi, babban bandwidth, haɓaka mai ƙarfi, dacewa tare da Ethernet data kasance, da gudanarwa mai dacewa.
Na yau da kullun na EPON na gani a kasuwa sune:
(1) EPONOLTPX20+/PX20++/PX20+++ na gani na gani module, dace da Tantancewar cibiyar sadarwa naúrar da Tantancewar line m, ta watsa nisa ne 20KM, guda-mode, SC dubawa, goyon bayan DDM.
(2) 10G EPONONUSFP+ na gani na gani, wanda ya dace da naúrar cibiyar sadarwar gani da tashar layin gani. Nisan watsawa shine 20KM, yanayin guda ɗaya, SC dubawa, da tallafin DDM.
Ana iya raba 10G EPON zuwa kashi biyu bisa ga ƙimar: yanayin asymmetric da yanayin daidaitacce. Matsakaicin ƙimar yanayin asymmetric shine 10Gbit/s, ƙimar haɓakawa shine 1Gbit/s, kuma ƙimar sama da ƙasa na yanayin daidaitawa duka 10Gbit/s ne.
2, GPON
Kungiyar FSAN ce ta fara gabatar da GPON a watan Satumba 2002. A kan haka ne ITU-T ta kammala samar da ITU-T G.984.1 da G.984.2 a watan Maris 2003, sannan ta kammala G.984.1 da G.984.2 a watan Fabrairu da Yuni. 2004. 984.3 daidaitawa. Ta haka a ƙarshe suka kafa daidaitattun iyali na GPON.
Fasahar GPON ita ce sabuwar ƙarni na ƙaƙƙarfan ma'auni na haɗaɗɗiyar hanyar sadarwa ta hanyar sadarwa mara kyau bisa ma'aunin ITU-TG.984.x. Yana da fa'idodi da yawa kamar babban bandwidth, inganci mai girma, babban ɗaukar hoto, wadatattun mu'amalar masu amfani, kuma galibin masu aiki suna ɗaukarsa a matsayin abin da ya dace da fasaha mai kyau don sabis na hanyar sadarwa ta hanyar sadarwa da ingantaccen canji.
Na yau da kullun na GPON na gani a kasuwa sune:
(1) GPONOLTCLASS C +/C ++/ C + + Module na gani, wanda ya dace da tashar layin layin gani, nisan watsawarsa shine 20KM, ƙimar shine 2.5G/1.25G, yanayin guda ɗaya, SC dubawa, tallafin DDM.
(2) GPONOLTCLASS B + na gani na gani, wanda ya dace da tashar tashar layin gani, nisan watsawarsa shine 20KM, saurin 2.5G/1.25G, yanayin guda ɗaya, SC dubawa, tallafi DDM.
