The JBX05959 200GBASE-CR4 QSFP56 Direct Attach Copper cable represents the pinnacle of data center connectivity solutions. At 2.5 meters in length, this passive DAC cable offers the ideal balance between reach and performance for modern enterprise networking infrastructure. **Key Technical Features:** This cable meets IEEE 802.3cd specifications and qualifies for QSFP56 MSA and CMIS standards, ensuring seamless integration with compliant network equipment. The 26AWG gauge twinax copper construction delivers superior electrical characteristics with minimal attenuation, supporting full 200Gbps data rates without signal degradation. Dual QSFP56 connectors provide secure, low-loss connections at both ends. **Compliance & Reliability:** Fully RoHS and ELV compliant with TUV and UL safety certifications, this cable meets EU Directive 2002/95/EC requirements. The 90-day limited warranty provides peace of mind for mission-critical deployments. Manufactured with quality control standards from trusted facilities, ensuring consistent performance across all units. **HPE Compatibility:** Direct replacement for HPE part numbers P06149-B25 and R5Z79A, making this an excellent alternative to OEM cables at competitive pricing. Compatible across HPE's comprehensive networking portfolio including switches, servers, and storage arrays. **Ideal Applications:** Perfect for data center rack-to-rack connections, ToR switch deployments, server-to-storage links, and high-speed network backbones. The passive design eliminates power consumption concerns while maintaining exceptional reliability over short distances. **Shipping & Support:** Qualifying orders receive free standard shipping from regional hubs in Danville, CA and Beaufort, SC. Custom brand programming is available for enterprise customers requiring OEM-equivalent solutions. Operating temperature range of 0-70°C accommodates standard and elevated-temperature data center environments.