DAC cable CBO DEM-CB100Q28-2 QSFP28 100G 2m

BlueOptics DAC cable CBO DEM-CB100Q28-2 QSFP28 100G 2m is a direct attach copper (DAC) interconnect designed for short-reach high-speed links. With QSFP28 to QSFP28 connections it supports 100 Gbps data rates over a 2-metre copper assembly, providing a low-latency, low-power alternative to optical transceivers. The cable is intended for point-to-point links inside racks and between adjacent racks in data centre and enterprise networking environments and is compatible with devices that accept QSFP28 passive copper modules.

Advantages

The passive copper construction eliminates the need for external power or complex configuration and reduces overall system cost compared with active optical solutions. Its QSFP28 form factor and 2 m length deliver predictable electrical performance and minimal latency for switch-to-switch, switch-to-server and server-to-server connections. The cable offers easy installation with plug-and-play operation, robust mechanical QSFP28 connectors for secure mating, and consistent transmission characteristics suitable for short-reach, high-density deployments.

Suitable for

• Short-reach 100G links inside server racks
• Interconnects between adjacent network switches and routers
• High-density top-of-rack and end-of-row cabling
• Cost-sensitive data centre aggregation and leaf-spine fabrics

Key specifications

• Connector type: QSFP28 to QSFP28 (passive copper)
• Data rate: 100 Gbps
• Length: 2 metres
• Cable medium: Twinax copper assembly
• Construction: Passive (no active components or external power)
• Typical application: Short-reach rack and adjacent-rack interconnects

How to use

Install the cable by firmly inserting each QSFP28 connector into the corresponding port until it clicks into place. Ensure devices are powered and ports are configured according to the networking equipment vendor guidelines; the cable itself requires no additional configuration. Route the cable to avoid sharp bends and excessive tension, keeping bend radius within manufacturer-recommended limits. For high-density installations, label both ends to simplify maintenance and traceability.

Recommendations

Use this DAC cable for short runs up to 2 m where low latency and cost efficiency are priorities. Avoid using the cable for longer-distance connections or in environments that require active signal conditioning. Follow equipment vendor compatibility lists and handle connectors carefully to maintain reliable contact and prevent port damage.