Keep 40 GbE uplinks stable across longer single-mode runs with this QSFP+ MPO transceiver from AddOn Networks. Built for 40G-PLR4 deployments, it uses a 1310 nm optical design to support high-speed links where distance and consistency are critical. That makes it a strong fit for aggregation layers, spine-and-leaf fabrics, and data center interconnects that need dependable throughput without moving to a more expensive platform. The MPO connector format supports dense optical cabling, while the QSFP+ form factor preserves port efficiency in switches and routers that depend on compact, high-port-count designs. For teams standardizing on Arista-compatible optics, this module offers a practical path to maintain performance and simplify sourcing across mixed infrastructure environments. It is a focused choice for organizations that need verified transceiver compatibility and the operational confidence that comes with a purpose-built 40G optical module.