I-EPON ubuchwepheshe be-PON obusekelwe ku-Ethernet.Isebenzisa ubuchwepheshe be-PON kungqimba olubonakalayo, iphrothokholi ye-Ethernet kungqimba lwesixhumanisi sedatha, ukufinyelela kwe-Ethernet kusetshenziswa i-PON topology, kanye nokufinyelela kwesevisi ephelele kudatha, izwi, nevidiyo kusetshenziswa i-optical fiber.
Incazelo yomkhiqizo we-EPON:
I-EPON idlulisa futhi yamukele amasiginali ngefayibha eyodwa.Le mishini ibizwa ngokuthi i-single-fiber bidirectional transmission mechanism.Ngokusebenzisa ubuchwepheshe be-WDM wavelength division multiplexing, ukudluliswa kwe-bidirectional ye-fiber eyodwa kufinyelelwa ngamaza ahlukene (ezansi komfula i-1490nm, i-upstream 1310nm), futhi imifudlana yedatha ekhuphukayo nephansi yomfula idluliselwa ngesikhathi esisodwa ku-fiber eyodwa ngaphandle kokuthintana.
Ngesikhathi esifanayo, i-1000 BASE-PX-10 U ichazwa / D kanye ne-1000 BASE-PX-20 U / D PON ye-optical interfaces isekela ukudluliswa kwebanga eliphezulu lika-10 km no-20 km ngokulandelana. kanye nomkhawulokudonsa ongezansi.Kuyinethiwekhi ye-passive optical esekelwe ku-Ethernet.I-OLT yamukela i-Ethernet encapsulation futhi idlulisa uhlaka lwefreyimu ye-Ethernet.Ngakho-ke, i-EPON isuselwe kufomethi yozimele engu-802.3.
Ngokwesivumelwano se-IEEE802.3ah-2004: amandla okudlulisela ohlangothini lwe-OLT makhulu kuno-2dBm, futhi ukuzwela kokwamukela kungu-<-27dBm;ngoba amandla okudlulisa e-ONU makhulu kune--1dBm, ukuzwela okutholayo kungu-<-24dBm, ukulahleka kwaso sonke isixhumanisi sokubona kufika ku-<24dB, kwehle kufika ku-<23.5dB.Ukulahlekelwa kwe-EPON ekhuphuka nomfula i-1310nm kanye no-1490nm wavelengths ongezansi ku-G.652 fiber cishe ngu-0.3dB / km.Kafushane, isabelomali samandla siyinto ebaluleke kakhulu ye-EPON yebanga elide.
Izici zomkhiqizo we-EPON
①1.25Gbps isixhumanisi sedatha ye-symmetric single fibre bidirectional
②3.3V i-voltage yokusebenza
③DDM umsebenzi wokuqapha ukuxilongwa kwedijithali
④Isiphazamiso se-Anti-electromagnetic, esinokuvikelwa kwe-anti-static
⑤Thobela izinga lokuphepha le-laser le-IEC-60825 Ikilasi 1
⑥Izinga lokushisa lokusebenza kwezohwebo: 0 ℃ ~ 70 ℃
Isicelo sobuchwepheshe be-EPON
① Kubasebenzisi basesidlangalaleni, izindlela zohlelo lokusebenza ezifana ne-FTTH ne-FTTB / C / Cab zingasetshenziswa.
②Kubasebenzisi bebhizinisi, izindlela zokusetshenziswa ezihlukile ezifana ne-FTTO, FTTB, noma i-FTTC zingamukelwa ngokuya ngezidingo zebhizinisi ezihlukile nesikali somsebenzisi.
③ I-“Global Eye” nezinye izinhlelo zokusebenza ezidinga umkhawulokudonsa ophezulu uma kuqhathaniswa (ikakhulukazi umkhawulokudonsa okhuphuka nomfula) zingasebenzisa i-EPON njengendlela yokufinyelela.I-PON ithatha indawo yeswishi yokuqala ye-Layer 2 / Layer 3 kusixazululo senethiwekhi ye-analog, kuyilapho ilondoloza ama-transceiver amaningi we-fiber, futhi ayidingi okokusebenza kwe-video optical transceiver.
④Endabeni yokushoda kwezinsiza ze-fiber optical, njengephrojekthi yedolobhana, i-optical splitter scheme enamandla okuhlukanisa amaleveli amaningi namandla okuhlukanisa angalingani angasetshenziswa, okungukuthi, amandla awalingani uma kukhona i-core eyodwa noma amaningana. ama-optical splitters ahlangana iphuzu nephoyinti.
I-EPON ihlangabezana ngokugcwele nezidingo zomkhawulokudonsa wamakhasimende enethiwekhi yokufinyelela, futhi ingakwazi ukwaba umkhawulokudonsa ngendlela eguquguqukayo nangokuvumelana nezinguquko zezidingo zabasebenzisi, okwenza izimpilo zezakhamizi zomphakathi zikhululeke, ziphephe futhi zibe lula.