The structure of primary light splitting is an OLT-optical splitter-ONU, and the optical splitters from OLT to ONU are all connected in parallel. PON (passive optical network) is a fiber-optic network that employs a point-to-multipoint topology and fiber optic splitters to transmit data from a single source to multiple user endpoints. Unlike an Active Optical Network (AON), where multiple customers are linked to a single transceiver through. The OLT communicates with the optical network unit (ONU) or optical network terminal (ONT) at the user end, coordinating the distribution of data and ensuring that each connected user receives the appropriate information. Based on the number of deployed splitters, splitting can be: First-level splitting Second-level splitting (using two splitters) The product of the splitting ratios of the two splitters must not exceed the system's maximum. By dividing a single optical signal from a central Optical Line Terminal (OLT) into multiple outputs for Optical Network Terminals (ONTs) at users' homes, splitters eliminate the need for dedicated fibers to each residence—slashing infrastructure costs while scaling network reach.
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