Abstract
Ethernet Passive Optical Network (EPON) is used in access network. , Optical Line Terminal (OLT) is connected with multiple Optical Network Unit (ONU) by the network connected by Optical Distribution Network (ODN) which consists of passive cable, optical splitters and optical combiners . Ethernet technology is by far the most successful and sophisticated Local Area Network (LAN) technology. EPON is the supplement of the existing agreement IEEE802.3, basically compatible. The compatibility of EPON and Ethernet is one of its greatest strengths. EPON’s downstream channel is for the Fast/Gigabit of the broadcasting, while the upstream is for users to share the Fast/Gigabit channel. It offers symmetric uplink and downlink 1.25Gbit/s of bandwidth. In addition, EPON system can provide remote access within 20KM, with the characteristics of long distance and wide coverage.
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