The JBX05391 1-meter 40GBASE-CR4 QSFP+ passive direct attach copper cable represents a cost-effective, high-performance solution for enterprise networking environments. Designed specifically for HPE H3C compatible systems, this twinax cable delivers the reliability and speed demanded by modern data centers. **Technical Specifications:** This passive DAC cable features QSFP+ connectors on both ends, enabling direct connection between compatible network switches, servers, and storage devices. The 30AWG gauge copper construction ensures optimal signal integrity while the plastic jacketing provides durability in demanding environments. With a 1-meter length, it's ideal for short-reach, high-speed connections within rack configurations. **Performance & Standards Compliance:** Qualified to IEEE 802.3ba specifications and SFF-8436 standards, the JBX05391 supports 40GB data transmission rates with minimal latency. The cable operates reliably across a 0–70°C temperature range, making it suitable for both standard and challenging deployment environments. Each cable undergoes rigorous testing to ensure consistent performance and compatibility. **Advantages of Passive DAC Technology:** Unlike active DAC cables or fiber optics, passive DAC technology requires no power consumption, reducing operational costs and complexity. This makes the JBX05391 an economical choice for data center operators seeking to upgrade network infrastructure without significant energy implications. **Certification & Compliance:** Fully RoHS and ELV compliant, adhering to EU directive 2002/95/EC, this cable meets international safety standards (TUV, UL). The cable is sourced from Vietnam and China manufacturing facilities, ensuring consistent quality control and competitive pricing. **Application Scenarios:** Ideal for server interconnects, switch-to-switch uplinks, storage array connections, and virtual machine migration infrastructure. Whether upgrading existing HPE H3C systems or deploying new high-speed network architecture, this cable provides reliable, low-latency connectivity. **Warranty & Support:** Backed by a 90-day limited warranty and available with custom brand programming, the JBX05391 offers flexibility for enterprise deployments. Free standard shipping on orders exceeding $99, with fulfillment from Danville, CA and Beaufort, SC facilities ensures quick delivery to your location.