DAC Cable CBO QSFP28 to QSFP28 2 m (CAB-Q28-Q28-2M-BL) Direct Attach Copper

BlueOptics DAC Cable QSFP28 to QSFP28 2 m (CAB-Q28-Q28-2M-BL) is a 2‑meter direct attach copper link designed for short‑reach, high‑speed interconnections between devices with QSFP28 ports. The cable provides a low‑latency, low‑power physical connection without the need for separate optical transceivers, simplifying rack cabling for switches, routers and servers that support QSFP28 interfaces.

Advantages

The direct attach copper design delivers deterministic latency and reduced power consumption compared with optical modules and active optics for equivalent short distances. Its fixed 2 m length ensures consistent signal integrity for short‑reach data center links while reducing component count and installation complexity. The QSFP28 to QSFP28 connector pair supports 100 Gigabit Ethernet and compatible high‑speed protocols, enabling straightforward, space‑efficient connections in top‑of‑rack and aggregation layers.

Suitable for

• Short‑reach connections between QSFP28 ports in racks and cabinets
• Interconnects between 100 Gigabit Ethernet switches and routers
• Direct server-to-switch links for high‑performance compute nodes
• Patch and spine links in data center topologies where 2 m copper is appropriate

Key specifications

• Cable type: Direct attach copper (DAC)
• Connector types: QSFP28 to QSFP28
• Length: 2 m
• Supported data rate: up to 100 Gbps per port (QSFP28 compatible)
• Typical use: short‑reach, passive copper interconnect
• Form factor: fixed‑length twinax with integrated connectors

How to use

Insert each QSFP28 connector into the corresponding QSFP28 port on your network devices until the latch engages. Ensure both devices are powered and configured to use the QSFP28 interface and that firmware or drivers support passive DAC attachments. Verify link status in device management interfaces and check for appropriate speed and duplex settings. For reliable operation, avoid bending the cable sharply near the connector and route it to minimize mechanical stress and interference.

Recommendations

Use this 2 m DAC cable for short‑reach 100 Gbps links inside racks or between adjacent racks. Confirm port compatibility with QSFP28 passive copper assemblies in device documentation before deployment, and adhere to handling practices to preserve connector integrity and signal quality.