PON yog hais txog lub passive optical fiber network, uas yog ib qho tseem ceeb rau broadband access network kev pab cuam yuav tsum nqa.
PON thev naus laus zis pib xyoo 1995. Tom qab ntawd, raws li qhov sib txawv ntawm cov ntaub ntawv txuas txheej thiab txheej txheej ntawm lub cev, PON thev naus laus zis tau maj mam muab faib ua APON, EPON, thiab GPON. Ntawm lawv, APON thev naus laus zis tau raug tshem tawm los ntawm kev ua lag luam vim nws tus nqi siab thiab qis bandwidth.
1. EPON
Ethernet-based PON technology. Nws txais cov qauv point-to-multipoint thiab passive optical fiber kis tau tus mob los muab ntau yam kev pabcuam ntawm Ethernet. EPON thev naus laus zis tau tsim los ntawm IEEE802.3 EFM pawg ua haujlwm. Hauv cov qauv no, Ethernet thiab PON thev naus laus zis tau sib xyaw ua ke, PON thev naus laus zis tau siv rau hauv txheej txheej ntawm lub cev, Ethernet raws tu qauv siv rau hauv cov ntaub ntawv txuas txheej, thiab PON topology yog siv los paub txog Ethernet nkag.
Qhov zoo ntawm EPON thev naus laus zis yog tus nqi qis, siab bandwidth, muaj zog scalability, compatibility nrog Ethernet uas twb muaj lawm, thiab kev tswj kom yooj yim.
Feem ntau EPON optical modules ntawm kev ua lag luam yog:
(1) PEBOLTPX20+/PX20++/PX20+++ optical module, haum rau kho qhov muag network chav tsev thiab kho qhov muag kab davhlau ya nyob twg, nws kis nrug deb yog 20KM, ib hom, SC interface, txhawb DDM.
(2) 10G EPONONUSFP + optical module, haum rau optical network chav tsev thiab kho qhov muag kab davhlau ya nyob twg. Kev sib kis deb yog 20KM, ib hom, SC interface, thiab kev txhawb nqa DDM.
10G EPON tuaj yeem muab faib ua ob pawg raws li tus nqi: asymmetric hom thiab symmetric hom. Tus downlink tus nqi ntawm hom asymmetric yog 10Gbit / s, tus nqi uplink yog 1Gbit / s, thiab uplink thiab downlink tus nqi ntawm hom symmetric yog ob qho tib si 10Gbit / s.
2, GPON
GPON tau xub thov los ntawm lub koom haum FSAN thaum lub Cuaj Hlis 2002. Raws li qhov no, ITU-T ua tiav cov qauv ntawm ITU-T G.984.1 thiab G.984.2 hauv lub Peb Hlis 2003, thiab ua tiav G.984.1 thiab G.984.2 thaum Lub Ob Hlis thiab Lub Rau Hli. 2004. 984.3 standardization. Yog li thaum kawg tsim cov qauv tsev neeg ntawm GPON.
GPON thev naus laus zis yog lub cim tshiab ntawm broadband passive optical integrated access standard raws li tus qauv ITU-TG.984.x. Nws muaj ntau yam zoo xws li high bandwidth, high efficiency, loj kev pab cuam, nplua nuj neeg siv interfaces, thiab yog suav hais tias los ntawm feem ntau cov tswv raws li ib tug realization Lub zoo tagnrho technology rau broadband kev pab cuam network thiab kev hloov pauv.
Feem ntau GPON optical modules ntawm kev ua lag luam yog:
(1) GPONOLTCLASS C + / C ++ / C +++ optical module, haum rau kho qhov muag kab davhlau ya nyob twg, nws kis tau tus mob yog 20KM, tus nqi yog 2.5G / 1.25G, ib hom, SC interface, txhawb DDM.
(2) GPONOLTCLASS B + kho qhov muag module, haum rau kho qhov muag kab davhlau ya nyob twg, nws kis nrug deb yog 20KM, ceev yog 2.5G / 1.25G, ib hom, SC interface, txhawb DDM.
