The JBX03186 1-meter 400G QSFP-DD to 4x QSFP28 Active Optical Cable represents cutting-edge connectivity technology for modern data center and enterprise network environments. This direct replacement for Cisco's QDD-4X100G-AOC1M combines high-speed performance with architectural flexibility that legacy copper solutions cannot match. **Technical Excellence** Built on proven active optical cable (AOC) technology, this breakout cable delivers full 400GBASE-SR4.2 performance by aggregating four synchronized 100G QSFP28 channels through a single QSFP-DD interface. The OM3 50/125 multimode fiber core with 16 total strands ensures optimal signal transmission within standard data center reach specifications. This configuration allows seamless integration with existing 100G infrastructure while supporting next-generation 400G switching capabilities. **Safety and Compliance** Comprehensive safety certifications including Class 1 Laser designation, TUV approval, UL/FDA compliance per 21CFR 1040.10, and full RoHS/ELV directive adherence provide complete regulatory confidence. The LSZH OFNR-rated plastic jacketing minimizes smoke and toxic gas emission in plenum and indoor environments, meeting stringent building codes. **Performance Characteristics** Operating across the full 0-70°C temperature range, this cable maintains consistent performance in diverse deployment scenarios. IEEE 802.3bs qualification, QSFP-DD MSA compliance, and CMIS support ensure compatibility with enterprise-grade equipment from leading manufacturers. **Practical Advantages** The 1-meter length accommodates typical short-reach data center patch bay applications while minimizing signal degradation. Active optical technology eliminates EMI interference concerns associated with copper cables. Free standard shipping on qualifying orders and 90-day limited warranty provide additional value. **Ideal Applications** Perfect for enterprises upgrading from 100G to 400G architecture, this cable enables phased modernization by maintaining backward compatibility with existing 100G equipment. Suitable for high-density switching deployments, storage area networks, and bandwidth-intensive computing environments.