EPON ndiukadaulo wa PON wozikidwa pa Ethernet.Imagwiritsa ntchito ukadaulo wa PON pagawo lakuthupi, Ethernet protocol pagawo lolumikizira deta, kulumikizana kwa Ethernet pogwiritsa ntchito PON topology, komanso mwayi wopezeka ndi data, mawu, ndi makanema pogwiritsa ntchito kuwala.
Kufotokozera za EPON:
EPON imatumiza ndikulandila ma sign pa ulusi umodzi.Njira imeneyi imatchedwa kuti single-fiber bidirectional transmission mechanism.Pogwiritsa ntchito teknoloji ya WDM wavelength division multiplexing transmission, single-fiber bidirectional transmission imatheka ndi mafunde osiyanasiyana (kutsika kwa 1490nm, kumtunda kwa 1310nm), ndipo mitsinje ya data yopita kumtunda ndi yotsika imafalitsidwa panthawi imodzi pa fiber imodzi popanda kukhudza wina ndi mzake.
Nthawi yomweyo, 1000 BASE-PX-10 U imatanthauzidwa / D ndi 1000 BASE-PX-20 U / D PON optical interfaces amathandizira kufalikira kwakutali kwa 10 km ndi 20 km motsatana.EPON imatha kupereka 1.25 Gbit / s kumtunda ndi bandwidth yotsika.Ndi netiweki yowoneka bwino yozikidwa pa Ethernet.OLT imatengera Ethernet encapsulation ndikutumiza mawonekedwe a Ethernet frame.Chifukwa chake, EPON idakhazikitsidwa pamtundu wa 802.3.
Malinga ndi mgwirizano wa IEEE802.3ah-2004: mphamvu yotumizira ya mbali ya OLT ndi yaikulu kuposa 2dBm, ndipo kulandira kumva ndi <-27dBm;chifukwa mphamvu yotumizira ya ONU ndi yaikulu kuposa -1dBm, kulandira chidziwitso ndi <-24dBm, kutayika kwa ulalo wonse wa kuwala kumafika <24dB, mpaka <23.5dB.Kutayika kwa EPON kumtunda kwa 1310nm ndi kumtunda kwa 1490nm wavelengths mu G.652 fiber ndi za 0.3dB / km.Mwachidule, bajeti yamagetsi ndiye chinthu chofunikira kwambiri pa EPON yakutali.
Zofunikira za EPON
①1.25Gbps symmetric single fiber bidirectional data ulalo
②3.3V voliyumu yogwira ntchito
③DDM ntchito yowunikira matenda a digito
④Anti-electromagnetic kusokoneza, ndi anti-static chitetezo
⑤ Tsatirani muyezo wa chitetezo cha laser wa IEC-60825 Class 1
⑥ Kutentha kwa ntchito zamalonda: 0 ℃ ~ 70 ℃
Ntchito yaukadaulo ya EPON
① Kwa ogwiritsa ntchito pagulu, njira zogwiritsira ntchito monga FTTH ndi FTTB / C / Cab zitha kugwiritsidwa ntchito.
②Kwa ogwiritsa ntchito mabizinesi, njira zosiyanasiyana zokhazikitsira monga FTTO, FTTB, kapena FTTC zitha kukhazikitsidwa motengera zosowa zamabizinesi osiyanasiyana komanso kuchuluka kwa ogwiritsa ntchito.
③ "Diso Lapadziko Lonse" ndi mapulogalamu ena omwe amafunikira bandwidth yapamwamba (makamaka kumtunda kwa bandwidth) angagwiritse ntchito EPON ngati njira yolowera.PON ilowa m'malo mwawosinthira woyamba wa Layer 2 / Layer 3 mu njira yolumikizira maukonde ya analogi, ndikupulumutsanso ma transceivers ambiri, ndipo safuna zida zowonera makanema.
④ Pakakhala kuchepa kwa zida zopangira kuwala, monga projekiti yakumudzi, njira yophatikizira yamagetsi yokhala ndi magawo angapo komanso mphamvu zogawika zosagwirizana zitha kugwiritsidwa ntchito, ndiye kuti, mphamvuyo imakhala yosafanana pakakhala chimodzi kapena zingapo. optical splitters amalumikizana mfundo ndi mfundo.
EPON imakwaniritsa zofunikira za bandiwifi yamakasitomala opezeka pa netiweki, ndipo imatha kugawa mwachangu komanso mosinthika bandwidth malinga ndi kusintha kwa zosowa za ogwiritsa ntchito, kupangitsa moyo wa anthu ammudzi kukhala womasuka, wotetezeka komanso wosavuta.