Extend 40 GbE connectivity where short-reach optics are not enough. This eNet Components QSFP-40G-LR4-ENC module is a Cisco-compatible QSFP+ transceiver designed for long-reach Ethernet over single-mode fiber. With LR4 optics and support for up to 10 km, it gives network teams a practical path for campus backbones, core uplinks, and building-to-building links without stepping up to a different transport layer. The value here is precision. LR4 is the right fit when you need stable 40 GbE performance across longer distances while keeping the deployment inside a familiar QSFP+ footprint. Single-mode fiber preserves signal quality over the span, and the Cisco-compatible design helps simplify platform matching in environments that standardize on established switching hardware. For teams comparing optics, this module earns its place by solving a specific problem: long-reach 40 GbE without unnecessary complexity. It is a focused choice for infrastructure that needs distance, compatibility, and predictable optical behavior in one module.