BlueOptics FMJDG InfiniBand fibre optic cable 5 m QSFP28 4xSFP28 Black

The BlueOptics FMJDG InfiniBand fibre optic cable 5 m QSFP28 4xSFP28 Black is a 5-metre active optical assembly designed to connect high-speed InfiniBand ports using a single QSFP28 plug on one end and four SFP28 plugs on the other. Intended for use in data centre and enterprise networking environments, this cable supports low-latency, high-bandwidth links between switches, servers and adapters while minimising signal loss over the specified length.

Advantages

This cable offers a compact, factory-terminated QSFP28-to-4xSFP28 solution that simplifies cabling and reduces the need for multiple discrete duplex connections. Its active optical construction provides stable signal integrity for high data rates typical of InfiniBand environments while keeping electrical interference to a minimum. The male-to-male connector configuration ensures straightforward plug-and-play compatibility with standard QSFP28 and SFP28 ports.

Suitable for

• High-performance computing clusters using InfiniBand interconnects
• Top-of-rack and spine switch connections requiring QSFP28 to multiple SFP28 links
• Server-to-switch or switch-to-switch short-reach connections up to 5 metres
• Environments demanding low-latency, high-bandwidth links such as virtualization hosts and storage networks

Key specifications

• Cable type: InfiniBand active fibre optic assembly
• Length: 5 metres
• Connector end A: QSFP28 (male)
• Connector end B: 4 × SFP28 (male)
• Colour: Black
• Designed for: high-speed, low-latency data transmission

How to use

Verify that your devices have compatible QSFP28 and SFP28 ports and that they support the intended InfiniBand link configuration. With both endpoints powered down or in a safe maintenance state if required by your equipment, insert the QSFP28 connector into the QSFP28 port and the SFP28 connectors into the corresponding SFP28 ports until each latch engages. After connection, power on devices and confirm link status via your switch or adapter management interface. For troubleshooting, reseat connectors and inspect for physical damage or contamination on the fibre endfaces.

Recommendations

Handle the cable by its connectors and avoid sharp bends; maintain the manufacturer’s minimum bend radius. Keep fibre endfaces clean and protected when not in use, and use approved cleaning tools before insertion to ensure optimal signal quality and to prevent port damage.