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 ngokugcwele 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-1310nm ekhuphukayo), kanye nemifudlana 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. IOLTyamukela i-Ethernet encapsulation futhi idlulisa uhlaka lohlaka lwe-Ethernet. Ngakho-ke, i-EPON isuselwe kufomethi yozimele engu-802.3.
Ngokwesivumelwano se-IEEE802.3ah-2004: amandla okudlulisa weOLTuhlangothi lukhulu kuno-2dBm, futhi ukuzwela kokwamukela kungu-<-27dBm; OkweI-ONUamandla okudlulisa makhulu kune--1dBm, ukuzwela okwamukelayo kungu-<-24dBm, ukulahlekelwa sonke isixhumanisi se-optical 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 yefiber eyodwa eqondiswa kabili
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 ingena esikhundleni Sesendlalelo sokuqala 2 / Isendlalelo sesi-3shintshakusixazululo senethiwekhi ye-analog, kuyilapho futhi ilondoloza ama-transceiver amaningi we-fiber, futhi ayidingi imishini ye-transceiver optical video.
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 zezakhamuzi zomphakathi zikhululeke, ziphephe futhi zibe lula.