The JBX05527 4-meter 100GBASE-CR2 QSFP28 direct attach copper cable represents a robust solution for organizations deploying high-speed Arista network infrastructure. As a passive breakout DAC, this cable eliminates the complexity and power consumption associated with active components, delivering exceptional value for cost-conscious IT operations seeking to optimize network performance. **Technical Excellence & Compliance** This cable meets rigorous IEEE 802.3bj and QSFP28 MSA specifications, ensuring compatibility with modern data center architectures. The 26AWG twinax copper construction provides superior signal integrity, minimizing crosstalk and attenuation over the 4-meter span. With full RoHS, TUV, and UL certifications, the cable complies with EU Directive 2002/95/EC and international safety standards, making it suitable for regulated enterprise environments. **Performance Characteristics** Designed for 100GB data rates, the cable operates reliably across 0-70°C temperature ranges, accommodating both standard and challenging environmental conditions. The dual QSFP28 connector configuration enables flexible network architecture deployment, supporting various topology options in modular switch designs. **Arista Compatibility** As a direct replacement for Arista CAB-Q-2Q-100G-4M, this cable integrates seamlessly into existing Arista deployments without requiring firmware updates or configuration changes. Organizations can confidently transition to alternative sourcing while maintaining 100% compatibility. **Ideal Applications** Perfect for data center interconnects, high-performance computing clusters, and enterprise backbone networks. The 4-meter length accommodates typical rack-to-rack deployments while the passive design ensures minimal power footprint in dense infrastructure environments. **Quality Assurance** Backed by a 90-day limited warranty and manufactured to stringent quality standards in Vietnam and China, this cable represents dependable network infrastructure investment. Free standard shipping on orders over $99 makes it accessible for both individual purchases and bulk deployments. **Maintenance & Longevity** The plastic jacketing protects copper conductors from environmental degradation, while the robust QSFP28 connectors withstand repeated insertion cycles typical of production data center operations. Proper cable management ensures optimal lifespan and performance consistency.