DAC cable CBO QSFP28-DAC-2M 2 m length, QSFP28 direct-attach copper for 100Gbps links

CBO QSFP28-DAC-2M is a 2 meter direct-attach copper (DAC) cable engineered for QSFP28 ports to deliver reliable 100Gbps short-range connectivity. Designed for use in data centre topologies and rack-to-rack links, the cable offers a compact, low-latency connection between switches, routers and servers where fibre optics are not required. The construction balances signal integrity and power efficiency for demanding high-bandwidth interconnects over short distances.

Advantages

The DAC cable provides a cost-effective alternative to optical transceivers and fibre assemblies for short reach connections, with low power consumption and minimal signal latency. Its pre-terminated QSFP28 connectors simplify installation and eliminate the need for separate transceivers, while the 2 m length fits typical rack and cabinet layouts. The copper assembly offers mechanical robustness and consistent electrical performance suitable for dense networking environments.

Suitable for

• 100Gbps switch-to-switch connections within the same rack or adjacent racks
• Server-to-switch links in data centres requiring short, high-bandwidth interconnects
• Router interconnects in wiring closets and equipment rooms where fibre is unnecessary
• High-density top-of-rack deployments with QSFP28 ports

Key specifications

• Connector type: QSFP28 direct-attach copper (pre-terminated)
• Rated data rate: 100 Gbps
• Cable length: 2 metres
• Media: copper twinax cable for short-reach links
• Typical use case: short-range, rack-to-rack or intra-rack connectivity
• Latency: low, hardware-level direct connection

How to use

Insert each QSFP28 connector into the corresponding QSFP28 port on network equipment, ensuring proper orientation and secure latch engagement. No separate optical transceivers or patch panels are required; the cable is pre-terminated for plug-and-play installation. Verify port settings and link status on connected devices and confirm 100Gbps link negotiation. For best results, route the cable to avoid sharp bends, excessive tension, and sources of electromagnetic interference.

Recommendations

Use this direct-attach copper cable for short-distance connections up to 2 m inside racks or between adjacent racks. Avoid running the cable near high-power electrical equipment and maintain minimum bend radius specified by the vendor to preserve signal integrity and mechanical life.