DAC cable CBO JNP-QSFP-DAC-5M 5 m QSFP Male–Male 40 Gbit/s

Direct Attach Copper (DAC) cable CBO JNP-QSFP-DAC-5M is a 5 m QSFP Male–Male assembly engineered for short-reach 40 Gbit/s connections. This BlueOptics cable provides a low-latency, low-power physical link between QSFP ports in switches, routers and servers. The cable is intended for use in data centre top-of-rack and equipment-to-equipment interconnects where a reliable and cost-effective 40GbE connection is required over a short distance.

Advantages

The CBO JNP-QSFP-DAC-5M offers plug-and-play operation with no additional transceivers required, reducing both initial investment and ongoing power consumption. Its fixed-cable design minimises signal loss and jitter for stable 40 Gbit/s throughput while simplifying rack cabling. The cable’s QSFP male connectors ensure mechanical compatibility with standard QSFP ports and support full-duplex 40GbE links with minimal added latency.

Suitable for

• Top-of-rack switch to switch connections in data centres
• Server-to-switch or server-to-router high-speed links
• Equipment-to-equipment interconnects inside racks or adjacent racks
• Short-reach 40GbE aggregation and spine-leaf fabric links

Key specifications

• Connector type: QSFP Male – QSFP Male
• Cable length: 5 metres
• Nominal data rate: 40 Gbit/s (full-duplex)
• Medium: Direct attach copper (twinax copper cable)
• Typical use case: short-reach interconnects in racks and adjacent racks
• Power consumption: passive (no active electronics in the cable)

How to use

Install the DAC cable by inserting each QSFP male connector firmly into compatible QSFP ports on the devices to be connected. Ensure devices are powered down or follow hot-plug guidelines from the equipment manufacturer when connecting or disconnecting. Verify link status and speed through the network device management interface; the cable is designed to present a native 40GbE interface when compatible ports and configurations are used.

Recommendations

Use the cable for short distances within racks or between adjacent racks to avoid unnecessary bend stress or kinking. Route the cable to prevent sharp bends and maintain the manufacturer’s minimum bend radius. Confirm QSFP port compatibility and firmware support on switches and servers to ensure proper link negotiation at 40 Gbit/s.