BlueOptics Q28-AOC-25M-SO-BO InfiniBand fibre optic cable 25m OM3

The BlueOptics Q28-AOC-25M-SO-BO InfiniBand fibre optic cable 25m OM3 is an active optical cable (AOC) with QSFP28 connectors on both ends, intended for short-range high-speed links within racks or between adjacent racks. Built with OM3 multimode fibre and a 25 meter length, this AOC supports 100GBASE-SR4 Ethernet and InfiniBand topologies requiring QSFP28 interfaces. The cable uses an LSZH outer jacket for low smoke and halogen-free operation and integrates electrical-to-optical and optical-to-electrical conversion in the QSFP28 modules for hot-pluggable use.

Advantages

The active optical construction provides reduced weight and greater flexibility compared with direct-attach twinax solutions, along with a smaller bend radius and reduced cable diameter. QSFP28 modules are manufactured to MSA/SFF and IEEE alignments, ensuring interoperability with compliant hardware. The cable is factory-tested for functionality and quality and is assembled using components from established optical and semiconductor manufacturers. Compliance with common industrial standards and material resilience testing are part of the production process.

Suitable for

• 100G high-speed links in data centers and HPC clusters
• Interconnects inside server racks and between adjacent racks
• InfiniBand and 100GBASE-SR4 network deployments requiring QSFP28 ports
• Applications where lower weight and improved cable flexibility are needed

Key specifications

• Connector type: QSFP28 to QSFP28
• Fibre type: OM3 multimode fibre
• Length: 25 meters
• Supported data rate: 100 Gbit/s (100GBASE-SR4 / InfiniBand applicable)
• Sheath material: LSZH (low smoke, zero halogen)
• Bend radius and diameter: reduced compared with direct-attach twinax designs
• Hot-pluggable active modules with built-in electrical/optical conversion

How to use

Unpack the cable and visually inspect QSFP28 connectors for damage or contamination before installation. Align each QSFP28 connector with the device port and insert until the connector latches; the built-in transceiver modules perform the signal conversion automatically. Use single-segment routing within racks or short inter-rack paths up to 25 meters, avoiding sharp bends and compressive stress on the LSZH jacket. The cable is hot-pluggable, but follow equipment vendor guidelines for link bring-up and firmware or driver requirements.

Recommendations

For optimal performance, route the cable with gentle curves, maintain bend radius limits, avoid tight cable bundles that increase attenuation, and keep QSFP28 connector endfaces clean. Verify compatibility with host hardware QSFP28 ports and ensure firmware or driver support for 100G interfaces. Use the cable in indoor data center environments and consult equipment documentation when integrating into InfiniBand or 100GBASE-SR4 networks.