Keep critical network links up across distances that strain standard optics. This AddOn Networks compatible QSFP28 transceiver is built for 40 km single-mode fiber deployments, giving infrastructure teams a practical way to extend 100G connectivity between buildings, campuses, and metro aggregation points. For environments where link reach and consistency matter more than commodity pricing, this module helps preserve optical margin over longer runs while fitting into QSFP28-capable hardware. It is a strong fit for backbone extensions, data center interconnects, and carrier-adjacent transport paths that need predictable performance over SMF. The LC interface simplifies integration into existing fiber plant, while the compatible design supports procurement flexibility when original OEM optics are not the right commercial choice. For teams standardizing on verified transceiver alternatives, this module offers a clear path to maintain network continuity without changing the architecture. Choose this optic when the cost of a failed long-haul link is higher than the cost of the module itself. It is designed for organizations that value reach, compatibility, and operational certainty in the same part number.