Sustain 40 GbE connectivity across multimode fiber runs with the AddOn QSFP-40GBASE-SWDM4-AO transceiver. This module is built for environments where compliance, interoperability, and predictable optical performance matter as much as raw speed. With MSA and TAA compliance, it fits procurement workflows that require documented sourcing and deployment confidence. Designed for 850 nm operation over MMF, this SWDM4 QSFP transceiver supports links up to 350 m, making it a strong fit for data center interconnects, aggregation layers, and campus backbones that need 40 GbE without moving to a more expensive fiber plant. The LC connector format simplifies integration into established multimode infrastructure. For teams balancing uptime, standards alignment, and budget discipline, this AddOn optic offers a straightforward path to maintain service levels while avoiding unnecessary over-specification. It is a practical choice when the network design is already settled and the priority is keeping the link stable, compliant, and easy to source.