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BlueOptics QSFP-DD to 2xQSFP56 fibre/InfiniBand cable 1 m, male/male, black
BlueOptics QSFP-DD to 2xQSFP56 fibre/InfiniBand cable 1 m, male/male, black (CAB-D-2Q-400G-1M-BL) is a 1 metre high-speed interconnect cable engineered for direct connections and breakout links in data centre and server environments. The cable features a single QSFP-DD plug on one end and two QSFP56 plugs on the other, enabling a 400 Gbit/s aggregate data path and compatibility between QSFP-DD ports and dual QSFP56 interfaces. Its compact, black jacket and male-to-male connectors are intended for short-reach applications where reliable, low-latency links are required.
The cable provides a straightforward physical breakout from a QSFP-DD port to two QSFP56 ports without additional transceivers, reducing component count and installation complexity. Supporting 400 Gbit/s aggregate throughput, it is suitable for high-bandwidth links inside racks or between adjacent equipment. The 1 m length minimises excess slack and helps maintain tidy cable management in dense rack deployments, while the black outer jacket offers a standard professional appearance and basic abrasion resistance.
Ensure compatible QSFP-DD and QSFP56 ports are present and that firmware or driver requirements for breakout operation are met on connected devices. Power down or follow hot-plug procedures recommended by your equipment vendor before inserting the cable. Insert the QSFP-DD plug into the 400G port and connect the two QSFP56 plugs to the target ports, verifying secure latch engagement. After connection, check link status LEDs or management interfaces to confirm the expected 400G-to-2×200G breakout operation.
Use this 1 m QSFP-DD to 2×QSFP56 cable for short-reach, in-rack or adjacent-cabinet connections. Avoid tight bends and excessive tensile force on the cable; maintain the manufacturer’s minimum bend radius and route the cable to prevent interference with airflow and other equipment. Verify device compatibility for QSFP-DD breakout and follow data centre best practices for cable management and port mapping.
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