InfiniBand/fibre optic cable BlueOptics CBL-NTWK-0942-MQ28C25M-BL 3 m QSFP28 Male/Male

The BlueOptics CBL-NTWK-0942-MQ28C25M-BL is a 3 m InfiniBand/fibre optic cable with QSFP28 male connectors on both ends. Engineered for short-reach, high-speed links, this cable supports 100GBase-CR4 electrical signaling over a direct-attach twinax copper construction and is suitable for connections inside racks and between adjacent racks in data center environments. The cable is designed to be MSA-compliant and compatible with hardware platforms that accept QSFP28 to QSFP28 direct-attach cables.

Advantages

This 3 m QSFP28 direct attach cable provides a low-latency, low-power option for short-distance 100 Gbps links. Passive twinax construction results in simple installation and reduced failure points compared with active modules. The 26 AWG conductor size and MSA-compliant design ensure predictable electrical performance and broad interoperability with switches, routers and storage systems that support QSFP28 DACs.

Suitable for

• 100 Gbps short-reach connections within and between adjacent server racks
• High-performance computing (InfiniBand and Ethernet) interconnects
• Switch-to-switch, switch-to-server or switch-to-storage links where QSFP28 DAC is supported
• Data center top-of-rack and spine-leaf deployments with short cable runs

Key specifications

• Cable length: 3 metres
• Connector type: QSFP28 male to QSFP28 male
• Supported link rate: up to 100 Gbps (100GBase-CR4 compliant)
• Cable type: passive direct attach twinax copper
• Conductor size: 26 AWG
• Applications: Ethernet, FCoE, Fibre Channel and InfiniBand over short distances

How to use

Install the cable by aligning each QSFP28 connector with the corresponding QSFP28 port on your devices and inserting until the connector latches. Use the cable for short-reach direct connections between QSFP28-capable ports; ensure both endpoints support passive DAC operation and the desired protocol (Ethernet, FCoE, Fibre Channel or InfiniBand). Avoid sharp bends and excessive strain on the cable; maintain the minimum bend radius recommended by the equipment manufacturer to preserve signal integrity.

Recommendations

Verify compatibility with your switch, server or storage vendor before deployment and, when possible, test a sample link to confirm link training, speed and protocol operation. Route the cable to minimize bend and mechanical stress, and avoid proximity to strong electromagnetic interference sources for optimal performance.