BlueOptics Q28-AOC-25M-RW-BO InfiniBand fibre optic cable 25m QSFP28

The BlueOptics Q28-AOC-25M-RW-BO InfiniBand fibre optic cable is a 25-meter QSFP28 to QSFP28 active optical cable (AOC) engineered for 100G high-speed short-reach links within racks or between adjacent racks. It uses OM3 multimode fibre with a 50 µm core diameter and LSZH (low smoke zero halogen) sheath for reduced smoke and halogen emissions. The cable integrates hot-pluggable QSFP28 transceiver modules with built-in optical/electrical conversion to support 100GBASE-SR4 Ethernet and InfiniBand interconnects while providing lower weight and improved flexibility compared with passive Direct Attach twinax assemblies.

Advantages

The AOC design offers an integrated I/O and O/E converter in each QSFP28 connector, enabling reliable optical transmission over 25 meters without separate transceivers. OM3 multimode fibre and QSFP28 interfaces provide compatibility with 100GBASE-SR4 and InfiniBand high-throughput applications. The LSZH jacket improves safety in enclosed environments by limiting halogen release and smoke in case of fire. Compared with DAC copper assemblies, this active optical cable has a smaller bend radius, reduced weight, and enhanced flexibility for dense rack installations.

Suitable for

• Short-reach 100G connections inside racks or between adjacent racks
• High-performance computing and InfiniBand fabric links
• Data centre top-of-rack and spine-leaf interconnects supporting 100GBASE-SR4
• Server-to-switch and switch-to-switch links requiring QSFP28 interfaces

Key specifications

• Length: 25 meters
• Connector type: QSFP28 to QSFP28 (hot-pluggable)
• Fibre type: OM3 multimode
• Core diameter: 50 µm
• Supported standard: 100GBASE-SR4 Ethernet and InfiniBand high-speed links
• Sheath material: LSZH (low smoke zero halogen), flame resistant
• Form factor compliance: SFF/MSA and relevant IEEE specifications for QSFP28

How to use

Ensure both host ports support QSFP28 modules and are powered down or in a state recommended by the equipment vendor for hot-plug operations if required. Remove dust caps from the QSFP28 connectors, align the connector keying with the port, and insert until the latch engages. The built-in optical/electrical conversion in the AOC eliminates separate transceivers; the connected devices should recognize the link per their firmware and driver support for 100GBASE-SR4 or InfiniBand. Avoid installing the cable near sharp edges and maintain the manufacturer’s recommended bend radius to prevent attenuation or damage.

Recommendations

Inspect connectors before installation and keep dust caps in place when not in use. Use appropriate port settings and firmware that support QSFP28 AOC modules, and route the cable to avoid tight bends, kinks, or compression. For critical installations, validate link performance after deployment and follow data centre safety standards for LSZH cables.