Couplers have multiple interface types — SC, LC, ST — and we need to ensure these match our fiber patch cables and all of our devices. SC: Most dominant, widely used in networking and telecom installations. ST: Legacy or. In the backbone of modern Fiber-to-the-Home (FTTH) networks, optical splitters serve as the unsung heroes that enable cost-efficient connectivity for millions of subscribers. By dividing a single optical signal from a central Optical Line Terminal (OLT) into multiple outputs for Optical Network. Selecting the right splitter is crucial for building a reliable fiber optic network. PLC splitters are based on planar lightwave circuit technology, ensuring uniform signal distribution and supporting high split ratios up to 1×64 or even higher. In large-scale FTTH and Quick ODN deployments, incorrect splitter. Whether you're deploying a Passive Optical Network (PON), connecting MDUs, or expanding fiber access in rural zones, the right splitter configuration can dramatically affect performance, layout simplicity, and project cost. In this guide, you'll learn how fiber splitters function in PON networks, the difference between PLC and FBT types, and how to choose the best.