Direct Attach Copper (DAC) cable CBO QFX-QSFP28-DAC-2M, QSFP28 to QSFP28, 2 m length

CBO QFX-QSFP28-DAC-2M is a 2-meter Direct Attach Copper (DAC) passive twinax cable with QSFP28 connectors on both ends, designed for short-reach 100GbE interconnects in data center environments. The cable is compatible with Juniper equipment and intended for use between switches, routers or between servers and top-of-rack switches where low latency and energy efficiency are priorities. As a copper DAC it provides a cost-effective alternative to optical transceivers for links within the same rack or adjacent racks.

Advantages

This QSFP28 to QSFP28 DAC cable delivers low latency and reduced power consumption compared with optical modules, and its passive twinax construction allows straightforward, plug-and-play deployment without the need for separate transceivers. The 2 m length is suitable for intra-rack and short inter-rack connections, offering reliable physical connection and predictable electrical performance for 100GbE links. Compatibility with Juniper equipment ensures straightforward integration in networks using the specified platform.

Suitable for

• Short-reach 100 Gigabit Ethernet links between switches and routers
• Server-to-switch connections in top-of-rack configurations
• Intra-rack and adjacent-rack cabling in data centers
• Environments where lower latency and reduced power draw are required

Key specifications

• Connector type: QSFP28 to QSFP28
• Cable type: Passive twinax (Direct Attach Copper)
• Rated speed: 100 Gigabit Ethernet
• Length: 2 meters
• Typical use environment: Data center short-reach interconnects (rack/adjacent rack)

How to use

Install the DAC cable by inserting each QSFP28 connector into the corresponding QSFP28 port on the network devices until the latch engages. Ensure devices are powered off or follow hot-plug procedures recommended by the device manufacturer when connecting or disconnecting. Confirm link status and speed through the device management interface after physical connection. No separate optical transceivers or additional cabling are required for operation.

Recommendations

Use this 2 m passive DAC for short links within racks or between adjacent racks to minimize latency and power consumption; avoid using it for long-distance or through-wall runs. Follow equipment vendor guidelines for QSFP28 port compatibility and handling to prevent damage to connectors and maintain link reliability.