The JBX03231 400GBASE-SR4.2 QSFP-DD Active Optical Cable is an enterprise-grade networking solution engineered for modern high-speed data center applications. This 100-meter breakout cable provides seamless compatibility with Cisco infrastructure, specifically replacing the OEM part number QDD-4ZQ100G-AOC100M while delivering superior performance and reliability. **Key Features and Specifications:** This active optical cable utilizes a single QSFP-DD male connector that breaks out into four QSFP56 connectors, enabling efficient port distribution and reducing installation complexity. The cable incorporates 16 strands of OM4 50/125 multimode fiber, providing superior bandwidth capabilities compared to standard single-mode alternatives. At 100 meters in length, it's ideal for inter-cabinet connectivity and campus network deployments without signal degradation. **Performance and Compliance:** Qualified to IEEE 802.3bs specifications and QSFP-DD MSA standards, this AOC delivers consistent 400GB data transmission rates. The construction meets CMIS specifications for maximum interoperability with modern networking equipment. Safety certifications include Class 1 Laser compliance, TUV certification, and UL/FDA approval per 21CFR 1040.10, ensuring safe operation in professional environments. **Construction and Durability:** The cable features robust plastic jacketing with OFNR (Optical Fiber Non-Conductive Riser) rating, making it suitable for vertical cable runs in buildings without PVC concerns. This fire-resistant design enhances safety in multi-story data centers and network closets. The RoHS-compliant composition ensures environmental responsibility and compliance with EU directive 2002/95/EC. **Operational Advantages:** Operating within a 0 to 70°C temperature range, this cable maintains performance stability in diverse data center environments. The active optical technology eliminates the distance limitations of traditional copper alternatives, making it perfect for long-run applications. Custom brand programming is available, allowing enterprises to standardize cable inventory with proprietary branding. **Value Proposition:** This JBX03231 cable combines superior performance metrics with cost-effectiveness. Qualifying for free standard shipping on orders exceeding $99 and backed by a 90-day limited warranty, it represents excellent value for infrastructure upgrades. Compatible with Cisco systems and other major vendors supporting QSFP-DD standards, it offers flexibility for mixed-vendor environments. **Ideal Use Cases:** Perfect for data center interconnections, cloud infrastructure deployments, and high-performance computing networks requiring reliable 400GB connectivity. IT professionals and network administrators benefit from Cisco compatibility and proven reliability in demanding enterprise settings.