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Product description The QDD-4Q56-03C is a passive copper DAC breakout cable with one QSFP-DD connector and 4 QSFP56 at the other end and has 3m length. Cable provides short distance (same shelf) inexpensive connectivity at 400G rates between one QSFP-DD data port and four QSFP56 ones. Such cable can be used for 400G Ethernet, 200GAUI-4, 400GAUI-8 or other 400G applications. Cable has been tested and found compatible with most major brand networking vendors. The 400G Active Optical Cables can be used in a wide variety of applications such as: High capacity I/O in Storage Area Networks, Network Attached Storage, and Storage Servers Switched fabric I/O such as ultra high bandwidth switches and routers Data center cabling infrastructure High density connections between networking equipment QDD-400G-03AOC 400G direct attach optical cable specifications Connectors QSFP-DD 76pin and 4x QSFP56 56pin footprint Cable length 3m Connect speed 400G Cable type copper twinax Operation passive QDD-4Q56-03C product datasheet: PDF datasheet   Note: The 400G Direct Attach Cables can be made in any length between 0.5m and 3m. 3m is most common length needed. For any other distance, please contact our sales department by e-mail or telephone.