Move traffic efficiently between mixed-speed switch ports with a 15 m QSFP to 4 x SFP+ direct attach cable designed for Cisco-compatible deployments. This AddOn Networks breakout DAC lets a single 40 GbE QSFP+ interface fan out to four 10 GbE SFP+ links, making it a strong fit for aggregation, migration, and port-consolidation scenarios where clean cabling and predictable connectivity matter. The 15 m reach gives teams more flexibility than shorter breakout assemblies when connecting adjacent racks or equipment positioned farther apart in the row. By using a direct attach copper design, you avoid the cost and complexity of separate optics while keeping latency low and installation straightforward. That makes it a practical choice for data center operators standardizing on 40G-to-10G breakout paths. For environments that need to preserve port density, simplify migration from 10 GbE to 40 GbE, or connect Cisco-based switching infrastructure with minimal overhead, this cable delivers a focused answer. It is built for teams that value compatibility, reach, and operational simplicity in the same part number.