The JBX01128 400GBASE-ZR+ QSFP-DD transceiver represents the pinnacle of optical networking technology for enterprises and service providers requiring extended-distance, high-capacity data transmission. This coherent optical module delivers an impressive 400GB per second data rate while maintaining reliable signal integrity across single-mode fiber distances up to 120 kilometers—making it ideal for metro and regional network expansions, data center interconnects, and carrier backbone infrastructure. Key Technical Specifications: This transceiver utilizes 9/125 micron single-mode fiber with duplex LC/UPC connectors, ensuring compatibility with existing fiber infrastructure while minimizing signal degradation. The QSFP-DD form factor provides a compact, space-efficient solution without compromising performance. Qualified to IEEE 802.3bs and QSFP-DD MSA standards with CMIS compliance, the module integrates seamlessly into Cisco-based network ecosystems, directly replacing the OEM QDD-400G-ZR-S component. Robust Construction & Safety: Constructed with a durable metal case housing an advanced laser transmitter, the JBX01128 operates reliably within the 0-70°C temperature range, accommodating diverse deployment environments. The module meets stringent international safety certifications including Class 1 Laser designation, UL, FDA (21 CFR 1040.10), and TUV approvals. Full RoHS and ELV compliance ensures environmental responsibility and regulatory adherence across global markets. Unmatched Value & Support: Offering free standard shipping on orders exceeding $99, this transceiver is available through multiple distribution centers in Danville, CA and Beaufort, SC, ensuring rapid delivery. The 90-day limited warranty provides peace of mind, while custom brand programming options allow seamless integration into existing network architectures. Whether upgrading backbone infrastructure, expanding data center capacity, or implementing new carrier networks, the JBX01128 delivers enterprise-grade performance and reliability at competitive pricing.