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

The BlueOptics Q28-AOC-25M-MT-BO InfiniBand fibre optic cable is a 25 m QSFP28 to QSFP28 active optical cable (AOC) designed for 100G high-speed short-reach connections in data centres and rack-to-rack environments. Constructed with OM3 multimode fibre (50 µm core) and LSZH flame-resistant sheathing, this AOC converts electrical signals to optical and back using integrated transceiver modules compliant with SFF/MSA and IEEE form-factor specifications. It is a factory-tested, hot-pluggable solution intended to provide reliable 100GBASE-SR4 performance with lower weight and improved flexibility compared with direct-attach twinax alternatives.

Advantages

The active optical cable offers reduced weight and greater flexibility versus DAC copper solutions, with a smaller bend radius and reduced cable diameter for easier cable management in dense rack deployments. Integrated electrical-to-optical and optical-to-electrical conversion removes the need for separate transceivers, while adherence to SFF/MSA and IEEE standards ensures compatibility with compatible QSFP28 ports. The LSZH jacket provides halogen-free, low-smoke properties for improved safety in enclosed equipment rooms.

Suitable for

• 100GBASE-SR4 short-reach links within and between adjacent server racks
• High-bandwidth InfiniBand or Ethernet interconnects in data centres
• Switch-to-switch, switch-to-server, or switch-to-storage connections requiring QSFP28 ports
• Environments where lower weight and tighter bend radius improve cable routing

Key specifications

• Cable type: Active Optical Cable (AOC)
• Length: 25 meters
• Connector type: QSFP28 to QSFP28, hot-pluggable
• Supported data rate: 100 G (100GBASE-SR4 compatible)
• Fibre type: OM3 multimode fibre, 50 µm core diameter
• Jacket: LSZH (low smoke zero halogen), flame resistant
• Bend performance: improved small bend radius compared with DAC

How to use

Install the cable by inserting each QSFP28 connector into the corresponding QSFP28 port until the connector latches. The active modules require no separate transceivers or additional configuration in most systems; once connected, the integrated I/O and O/E converters negotiate link parameters automatically with the host devices. Ensure both ends are seated securely and verify link status through the network equipment management interface. Handle the cable by the connector housings and avoid excessive twisting or tight kinks; although designed for tighter bends than copper DACs, standard multimode fibre handling precautions should be followed.

Recommendations

Route the 25 m AOC to minimise sharp bends and mechanical stress; maintain bend radii above the manufacturer’s recommended limit. Use labelled cable management paths in racks to prevent strain on QSFP28 connectors and to simplify troubleshooting. For optimal performance, verify that connected QSFP28 ports support 100GBASE-SR4 and OM3 multimode operation and keep firmware/drivers up to date on network hardware.