Huawei QSFP-40G-CU1M DAC Cable – 40G QSFP+ Passive Copper, 1m

The Huawei QSFP-40G-CU1M High-Speed Direct-Attach Cable (DAC) is a cost-effective and high-performance solution for short-distance 40 Gigabit Ethernet connectivity. Designed for modern data centers and enterprise networking environments, this cable enables direct connections between QSFP+ ports without the need for separate optical transceivers or fiber cables.

This DAC cable operates at 40 Gbps and uses a QSFP+ to QSFP+ interface, making it ideal for connecting switches, routers, and servers within racks or across adjacent racks. With a 1-meter length, it is specifically optimized for short-reach deployments such as top-of-rack (ToR) switching and high-density data center architectures.

Unlike optical modules, the QSFP-40G-CU1M is a passive copper twinax cable, meaning it does not require additional power for signal amplification. This results in lower power consumption, reduced latency, and lower cost, making it a preferred solution for short-distance, high-speed interconnections.

The cable supports 40GBASE-CR4 standard and utilizes four parallel 10 Gbps channels, delivering reliable and stable high-bandwidth performance. It is also compatible with various networking protocols, including Ethernet and InfiniBand, ensuring flexibility across different environments.

With its plug-and-play design, the DAC cable can be quickly deployed without complex configuration. Its hot-swappable QSFP+ connectors allow easy installation and replacement without interrupting network operations.

The cable is engineered for durability and reliability, featuring a robust twinax copper construction and optimized shielding for signal integrity. It is designed for indoor use and supports a typical operating temperature range suitable for enterprise environments.

Overall, the Huawei QSFP-40G-CU1M DAC Cable is an efficient, low-cost alternative to fiber optics for short-range connections, delivering high-speed performance with minimal complexity—making it ideal for data centers, enterprise networks, and high-performance computing environments.