PON inoreva passive optical fiber network, inova nzira yakakosha yebroadband yekuwana network masevhisi kuti atakurwe.
PON tekinoroji yakatanga muna 1995. Gare gare, maererano nemusiyano pakati peiyo data link layer uye yemuviri layer, PON tekinoroji yakakamurwa zvishoma nezvishoma muAPON, EPON, uye GPON. Pakati pavo, tekinoroji yeAPON yakabviswa nemusika nekuda kwemutengo wayo wakakwira uye yakaderera bandwidth.
1, EPO
Ethernet-yakavakirwa PON tekinoroji. Iyo inotora point-to-multipoint chimiro uye passive optical fiber kutapurirana kuti ipe akawanda masevhisi paEthernet. Tekinoroji yeEPON yakamisikidzwa neIEEE802.3 EFM boka rinoshanda. Muchiyero ichi, matekinoroji eEthernet nePON anosanganiswa, tekinoroji yePON inoshandiswa muchikamu chemuviri, Ethernet protocol inoshandiswa mudhata rekubatanidza data, uye PON topology inoshandiswa kuona kupinda kweEthernet.
Zvakanakira EPON tekinoroji mutengo wakaderera, wakakwira bandwidth, yakasimba scalability, kuenderana neiyo iripo Ethernet, uye nyore manejimendi.
Anowanzo EPON optical modules pamusika ndeaya:
(1) EPONOLTPX20+/PX20++/PX20+++ optical module, inokodzera optical network unit uye optical line terminal, kureba kwayo kwekutumira i20KM, single-mode, SC interface, inotsigira DDM.
(2) 10G EPONONUSFP + optical module, yakakodzera optical network unit uye optical line terminal. Iyo yekufambisa kureba ndeye 20KM, single mode, SC interface, uye DDM rutsigiro.
10G EPON inogona kugoverwa muzvikamu zviviri zvichienderana nechiyero: asymmetric mode uye symmetric mode. The downlink rate yeasymmetric mode i10Gbit/s, uplink rate i1Gbit/s, uye uplink and downlink rates ye symmetric mode zvose zviri 10Gbit/s.
2, GPON
GPON yakatanga kurongedzerwa nesangano reFSAN munaSeptember 2002. Pachikonzero ichi, ITU-T yakapedza kuumbwa kweITU-T G.984.1 uye G.984.2 muna March 2003, uye yakapedzisa G.984.1 uye G.984.2 munaFebruary naJune. 2004. 984.3 standardization. Saka pakupedzisira vakaumba mhuri yakajairika yeGPON.
GPON tekinoroji ndiyo yazvino chizvarwa chebroadband passive optical integrated access standard yakavakirwa paITU-TG.984.x mwero. Iine mabhenefiti akawanda akadai seyepamusoro bandwidth, kushanda kwepamusoro, kufukidzwa kukuru, hupfumi hwevashandisi nzvimbo, uye inoonekwa nevazhinji vashandisi sekuziva Iyo tekinoroji yakakodzera yebroadband yekuwana network masevhisi uye shanduko yakazara.
Yakajairika GPON Optical modules pamusika ndeiyi:
(1) GPONOLTCLASS C +/C ++/C +++ optical module, yakakodzera optical line terminal, kureba kwayo kwekutumira i20KM, chiyero ndeye 2.5G/1.25G, single mode, SC interface, inotsigira DDM.
(2) GPONOLTCLASS B + optical module, inokodzera optical line terminal, kureba kwayo kwekutumira i20KM, kumhanya ndeye 2.5G/1.25G, single mode, SC interface, inotsigira DDM.
