CBO DAC Cable Dell Networking 470-ABYF 100G QSFP28 2m direct-attach copper cable

CBO DAC Cable Dell Networking 470-ABYF 100G QSFP28 2m direct-attach copper cable is a passive copper twinax solution intended for short-reach 100 Gigabit links. The cable features a QSFP28 connector on each end and supports a 100G data rate over a 2-meter length, providing a low-latency, low-power connection between compatible QSFP28 ports in switches, routers and servers. It is designed for compact top-of-rack and aggregation cabling in data centre racks where proven electrical performance and simple deployment are required.

Advantages

The direct-attach copper design delivers predictable latency and signal integrity for short-distance interconnects while avoiding the additional power and expense of active optical modules. With QSFP28 connectors and a fixed 2 m length, the cable simplifies rack-to-rack and within-rack connections and reduces clutter compared with multiple patch cords. Passive copper construction offers ready compatibility with equipment that supports QSFP28 DACs and provides stable electrical performance for dense, high-speed deployments.

Suitable for

• Short-reach 100G connections between QSFP28 ports in switches and routers
• Server to top-of-rack switch links in data centres
• Aggregation and spine-leaf links inside racks or between adjacent racks
• Environments where low latency and low power consumption are priorities

Key specifications

• Interface: QSFP28 to QSFP28
• Supported data rate: 100 Gigabit Ethernet
• Cable type: Direct-attach copper (passive twinax)
• Length: 2 metres
• Typical application: Short-reach interconnects in data centre racks

How to use

Ensure both endpoints support QSFP28 passive DAC connections and that firmware or hardware compatibility is confirmed for 100G operation. Power down or follow hot-plug safety procedures recommended by the equipment vendor, then insert each QSFP28 connector into the corresponding port until it latches. Route the cable to avoid sharp bends and mechanical stress; the fixed 2 m length is intended for within-rack or adjacent-rack connections. If necessary, check link status indicators on the connected devices to verify the 100G link is established and operating correctly.

Recommendations

Use this passive DAC cable for reliable short-distance 100G links inside racks or between neighbouring racks. Avoid exceeding the rated bend radius, and verify compatibility with your switch or server vendor for passive QSFP28 cables to ensure interoperability and expected performance.