QDD-400-CU3M - Cisco 400G Optical Modules Series
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QDD-400-CU3M
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QDD-400-CU3M-VHBRSN Overview
Cisco 400G QSFP-DD Transceiver, Passive Copper Cable, 3 meters QDD-400-CU3M
Overview
Cisco 400G QSFP-DD Transceiver, Passive Copper Cable, 3 meters
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Specification
QDD-400-CU3M Specification
Cisco 400G QSFP-DD Transceiver, Passive Copper Cable, 3 meters
Frequently Asked Questions
What is the primary function of the Cisco QDD-400-CU3M passive copper cable? +
The Cisco QDD-400-CU3M is a high-speed direct attach copper (DAC) cable designed for 400G connectivity. It serves as a cost-effective, low-latency interconnect solution for linking 400G QSFP-DD ports over short distances, typically within a single server rack or between adjacent racks in a high-density data center environment.
Can I use the QDD-400-CU3M for connections exceeding 3 meters? +
This cable is specifically engineered for a 3-meter reach. Because it is a passive copper assembly, it does not utilize signal amplification or equalization technology. Extending the cable beyond its rated length would introduce significant signal degradation and packet loss, so it should only be deployed within the recommended 3-meter limitation for reliable 400G performance.
What type of port interface is required to support the QDD-400-CU3M? +
This cable is specifically designed for the QSFP-DD (Quad Small Form-factor Pluggable Double Density) port interface. It is fully compliant with industry standards for 400G networking, allowing it to interface directly with Cisco switches and routers equipped with QSFP-DD cages, ensuring physical compatibility and high-speed data transmission between enterprise-grade hardware.
How does a passive copper cable differ from an active optical cable for 400G deployment? +
Passive copper cables like the QDD-400-CU3M offer the lowest power consumption and latency profiles by utilizing electrical signals directly through copper conductors. Unlike active optical cables, there is no signal conversion from electrical to optical, which simplifies the physical layer and reduces the total cost of ownership for short-range intra-rack connections.
Is the QDD-400-CU3M compatible with legacy 100G equipment? +
While the QSFP-DD form factor is designed for 400G operation, compatibility with legacy hardware depends on the specific host system's port capabilities and transceiver auto-negotiation settings. Always verify your specific switch port configuration to ensure it supports the necessary lane speeds and electrical signaling protocols before attempting to interoperate with 100G or other sub-400G environments.
What environmental considerations are necessary for high-density 400G copper cable deployments? +
When installing high-density cables like the QDD-400-CU3M, ensure proper cable management to maintain correct bend radii and avoid mechanical stress on the QSFP-DD port interface. Effective airflow management within the rack is also crucial, as even passive components can contribute to thermal accumulation if cable bundles obstruct the switch's intake or exhaust cooling zones.
Does the QDD-400-CU3M require specific software licensing for Cisco devices? +
This is a physical layer component and does not typically require a software license to function. However, the Cisco switch or router must have the appropriate port speed settings configured in the command line interface to recognize the 400G physical link. Ensure your device firmware is updated to the latest recommended version for optimal transceiver compatibility.
How do I manage or monitor the health of this DAC cable? +
As a passive DAC, this cable does not feature internal digital diagnostic monitoring (DOM) to report signal levels like an optical transceiver would. Management is handled through the host switch, where you can monitor port status, link-up conditions, and frame error rates to verify that the physical connection is performing reliably at the required 400G throughput.
How can I obtain a bulk quote for the QDD-400-CU3M for my upcoming data center project? +
For large-volume orders and competitive bulk pricing on the QDD-400-CU3M, simply reach out to our dedicated sales team via the quote request form on BuyRouterSwitch.com. We specialize in supporting large-scale enterprise infrastructure deployments and can provide customized pricing structures and availability schedules tailored to your specific project timelines and hardware requirements.
Why should I source my Cisco hardware from BuyRouterSwitch.com? +
BuyRouterSwitch.com is a trusted provider of enterprise networking equipment, focused on supplying authentic Cisco hardware for professionals. By choosing us, you benefit from a streamlined procurement process, secure ordering workflows, and expert assistance in verifying your hardware requirements, ensuring that your network infrastructure is built upon genuine components that meet the rigorous demands of modern, high-performance computing environments.
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