An Optical Distribution Network (ODN) is the passive fiber infrastructure that connects the Optical Line Terminal (OLT) in the central office to the Optical Network Unit (ONU/ONT) at the subscriber side. Unlike active equipment, the ODN does not require electrical power. This passive layer is known as the Optical Distribution Network (ODN). 9807 (XGS-PON), and IEC 60794 cable standards, the ODN forms the physical optical path responsible. One of the preferred ways to do this is with passive optical networks (PONs). As the name implies, these are unpowered optical networks that provide fast, reliable signals that split from a single source to many destinations. To date, most FTTH deployments in planning and deployment have used PON to save on fiber costs.
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