Support dense 40 GbE infrastructure with a direct-attach copper cable engineered for short-reach connectivity. The AddOn Networks X6557-R6-AO compatible assembly provides a QSFP+ to QSFP+ link path that avoids the cost and complexity of separate optics and fiber for in-rack or adjacent-rack deployments. For teams standardizing on NetApp environments, this TAA-compliant option helps align procurement requirements with operational needs. It is well suited for data center fabrics where predictable performance, fast installation, and controlled cable management are more important than long-distance transport. Direct-attach copper is often the right choice when you need to connect top-of-rack switches, storage systems, or high-throughput servers within the same row. Choose this cable when you want a clean 40GBASE-CU connection that keeps the signal path simple and the bill of materials lean. It is a practical fit for infrastructure teams that value compatibility, compliance, and dependable short-range throughput without overbuying optical components.