Maintain high-bandwidth connectivity in NDR-class environments with the Axiom MMS4X00-NS400-AX transceiver. This 400GBASE-DR4 OSFP module is designed for single-mode fiber deployments where short-reach, high-density links must stay predictable under load. Mellanox compatibility makes it a practical fit for teams standardizing on existing infrastructure while extending capacity without changing the network design. The flat-top OSFP form factor supports modern switch and adapter platforms built for 400 GbE aggregation, spine, and interconnect layers. With support for up to 100 m over SMF, it is well suited to rack-to-rack and row-scale connections where signal integrity and port density matter more than distance. For procurement teams, the value is straightforward: a compatible optics choice that preserves performance targets without paying for reach you do not need. Use this module when you need a disciplined, short-reach 400G optic for Mellanox-based environments and want a clean path to higher throughput in tightly packed fabrics.