DAC cable CBO QSFP28-DAC-1M 1m passive copper QSFP28 to QSFP28

The BlueOptics DAC cable CBO QSFP28-DAC-1M is a 1 meter passive copper direct-attach cable (DAC) with QSFP28 connectors on both ends. It provides a straightforward physical link for short-reach 100Gb/s connections between devices with QSFP28 ports, eliminating the need for separate optical transceivers. This cable is intended for use in high-density networking environments where low latency, low power consumption, and cost-effective connectivity are required for top-of-rack or adjacent-rack links.

Advantages

This passive QSFP28 to QSFP28 cable delivers a compact, low-latency connection while consuming less power than active optical modules. Its fixed 1 m length reduces cable management complexity in rack environments and offers predictable electrical performance for 100Gb/s links. The integrated connectors simplify installation and reduce component count compared with solutions that require separate transceivers and fiber patch cords.

Suitable for

• Short-reach 100Gb/s connections between switches and routers with QSFP28 ports
• Top-of-rack and adjacent-rack data center interconnects
• High-density server or storage uplinks where space and power are limited
• Lab and test environments requiring reliable fixed-length copper links

Key specifications

• Connector type: QSFP28 to QSFP28
• Cable type: passive twinax copper direct-attach
• Data rate: 100 Gb/s
• Length: 1 meter
• Application: short-reach rack-level interconnects
• Latency: low, electrical direct-attach link
• Power consumption: lower than comparable optical transceiver solutions

How to use

Install the CBO QSFP28-DAC-1M by inserting each QSFP28 connector into the corresponding QSFP28 port on your network devices until the latch engages. Ensure both ends are fully seated and that devices are powered according to vendor instructions. The cable is plug-and-play for most compatible switches, routers and adapters; verify link status through device management interfaces and check firmware compatibility if required. Avoid bending the cable sharply near the connectors and route it to minimize interference and mechanical strain.

Recommendations

Use this passive DAC for short-distance, high-speed links within the same rack or between adjacent racks to maximize energy efficiency and reduce component complexity. Confirm QSFP28 port compatibility and firmware support on both ends before deployment. For longer distances or where optical isolation is required, consider active optical solutions instead.