Keep short-range 40 GbE connections simple, stable, and cost-conscious with this AddOn direct attach cable. Built as an IBM 49Y7890 compatible QSFP+ to QSFP+ assembly, it is designed for 40GBASE-CU deployments that need dependable performance inside the rack or between adjacent racks. A passive copper DAC is often the right choice when you want to avoid the added cost and power draw of optical transceivers for short distances. This 1 m cable is well suited to tightly packed data center environments where clean cable management and consistent link behavior are more important than long-haul reach. TAA compliance also makes it a strong fit for public sector and regulated procurement workflows. For infrastructure teams standardizing on 40 GbE, this cable helps simplify spares planning and reduce integration friction. It supports direct attach connectivity between compatible QSFP+ ports, making it a straightforward option for switch uplinks, top-of-rack aggregation, and storage fabric connections where the run length is known and controlled.