PON imatanthawuza passive optical fiber network, yomwe ndi njira yofunikira kuti mautumiki a netiweki a Broadband ayendetsedwe.
Ukadaulo wa PON unayambira mu 1995. Pambuyo pake, malinga ndi kusiyana pakati pa kusanjikiza kwa data ndi thupi, teknoloji ya PON inagawidwa pang'onopang'ono ku APON, EPON, ndi GPON. Pakati pawo, teknoloji ya APON yathetsedwa ndi msika chifukwa cha mtengo wake wapamwamba komanso bandwidth yotsika.
1, EPO
Tekinoloje ya PON yochokera ku Ethernet. Imatengera kapangidwe ka point-to-multipoint komanso passive optical fiber transmission kuti ipereke ntchito zingapo pa Ethernet. Ukadaulo wa EPON umakhazikitsidwa ndi gulu la ogwira ntchito la IEEE802.3 EFM. Mulingo uwu, matekinoloje a Ethernet ndi PON amaphatikizidwa, ukadaulo wa PON umagwiritsidwa ntchito pagawo lakuthupi, protocol ya Ethernet imagwiritsidwa ntchito pagulu la data, ndipo PON topology imagwiritsidwa ntchito kuzindikira mwayi wa Ethernet.
Ubwino wa teknoloji ya EPON ndi mtengo wotsika, bandwidth mkulu, scalability wamphamvu, ngakhale ndi Efaneti alipo, ndi kasamalidwe yabwino.
Ma module owoneka bwino a EPON pamsika ndi awa:
(1) EPONOLTPX20+/PX20++/PX20+++ Optical module, yoyenera kwa optical network unit ndi optical line terminal, mtunda wake wotumizira ndi 20KM, single-mode, SC mawonekedwe, thandizo la DDM.
(2) 10G EPONONUSFP + optical module, yoyenera optical network unit ndi optical line terminal. Mtunda wotumizira ndi 20KM, mawonekedwe amodzi, mawonekedwe a SC, ndi chithandizo cha DDM.
10G EPON ikhoza kugawidwa m'magulu awiri malinga ndi mlingo: mawonekedwe asymmetric ndi symmetric mode. Kutsika kwa ma asymmetric mode ndi 10Gbit/s, uplink rate ndi 1Gbit/s, ndipo ma uplink ndi downlink ama symmetric mode onse ndi 10Gbit/s.
2, GPON
GPON idaperekedwa koyamba ndi bungwe la FSAN mu September 2002. Pachifukwa ichi, ITU-T inamaliza kupanga ITU-T G.984.1 ndi G.984.2 mu March 2003, ndipo inamaliza G.984.1 ndi G.984.2 mu February ndi June. 2004. 984.3 standardization. Pomaliza adapanga banja lokhazikika la GPON.
Ukadaulo wa GPON ndi m'badwo waposachedwa kwambiri wa Broadband passive Optical Integrated access standard motengera mulingo wa ITU-TG.984.x. Zili ndi ubwino wambiri monga bandwidth yapamwamba, kuyendetsa bwino kwambiri, kufalikira kwakukulu, malo ogwiritsira ntchito olemera, ndipo amawonedwa ndi ambiri ogwira ntchito monga kuzindikira Ukadaulo wabwino wopezera mautumiki amtundu wa Broadband ndi kusintha kwakukulu.
Ma module owoneka bwino a GPON pamsika ndi awa:
(1) GPONOLTCLASS C +/C ++/C +++ Optical module, yoyenera kwa optical line terminal, mtunda wake wotumizira ndi 20KM, mlingo ndi 2.5G / 1.25G, single mode, SC mawonekedwe, DDM yothandizira.
(2) GPONOLTCLASS B + optical module, yoyenera kwa optical line terminal, mtunda wake wotumizira ndi 20KM, liwiro ndi 2.5G / 1.25G, single mode, SC mawonekedwe, DDM yothandizira.
