The JBX01118 400GBASE-ER4 QSFP-DD transceiver represents cutting-edge optical networking technology, specifically designed for organizations requiring ultra-high-speed, long-distance data transmission over single-mode fiber infrastructure. KEY TECHNICAL SPECIFICATIONS: This transceiver operates at 400GB data rates while supporting 40km transmission distances, making it ideal for metro and regional network deployments. Utilizing 9/125 single-mode fiber with duplex LC/UPC connectors, it provides optimal signal integrity and minimal insertion loss. The QSFP-DD form factor ensures compatibility with modern high-density switch designs, allowing for maximum port density in equipment racks. PERFORMANCE & RELIABILITY: Qualified to IEEE 802.3bs and CMIS standards, the JBX01118 guarantees interoperability and performance benchmarks across multiple platforms. The metal case housing with integrated laser transmitter provides superior electromagnetic shielding and thermal management. Operating temperature range of 0-70°C ensures stable performance in varied datacenter and outdoor environments. COMPLIANCE & SAFETY: Fully certified for safety and environmental compliance, including Class 1 Laser classification, UL/FDA approval, and RoHS/ELV directives. These certifications ensure deployment in regulated environments and confirm sustainable manufacturing practices. COMPATIBILITY & INTEGRATION: Serving as a direct replacement for Cisco QDD-400G-ER4-S modules, this transceiver simplifies procurement and network upgrades. Custom brand programming is available for OEM integrations and enterprise deployments. VALUE PROPOSITION: With free standard shipping on orders exceeding $99 and a 90-day limited warranty, this transceiver offers exceptional value for network infrastructure upgrades. Manufactured in Vietnam and China utilizing quality control processes, the JBX01118 delivers enterprise-grade reliability at competitive pricing points suitable for growing networks and infrastructure modernization projects.