Ethernet Passive Optical Network (EPON), defined by IEEE 802.3ah, is a point to multipoint (Pt-MPt) network topology implemented with passive optical splitters, along with optical fiber PMDs that support this topology.
EPON is based upon a mechanism named MPCP (Multi-Point Control Protocol), which uses messages, state machines, and timers, to control access to a P2MP topology.
EPON ONU, optical network unit is a device that transforms incoming fiber optic passive component optical signals into electronics/terminals at a customer’s premises in order to provide telecommunications services over an optical fiber network.
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