Build 40 GbE links that stay compact, consistent, and easy to deploy across multimode fiber. This 40GBASE SR4 QSFP+ transceiver uses an 850 nm optical design and MTP/MPO connectivity to support short-reach networking in environments where port density and clean cabling matter. With up to 400 m reach, it fits the needs of data center and enterprise switching architectures that depend on reliable multimode optics for switch-to-switch and rack-to-rack connections. The QSFP+ form factor preserves valuable front-panel space while delivering the bandwidth required for aggregation and leaf-spine designs. Compared with lower-grade alternatives, this module is built for teams that need a standards-based 40 GbE optic that aligns with established multimode infrastructure. It helps maintain a consistent physical layer across deployments, reducing complexity when expanding capacity or refreshing switch interconnects.