The JBX01099 400GBASE-FR4 QSFP-DD transceiver represents the pinnacle of optical networking technology, delivering enterprise-grade performance for demanding telecommunications and data center applications. This high-capacity module is engineered to transmit 400 gigabits of data per second over duplex singlemode fiber spans up to 2 kilometers, making it ideal for medium-distance metropolitan area networks and large-scale data center interconnections. **Technical Specifications:** This QSFP-DD form factor transceiver features a 5x4x2mm metal chassis housing precision laser transmission components. The 9/125 micron singlemode fiber core ensures minimal signal degradation and maximum transmission fidelity. Duplex LC/UPC connectors provide secure, reliable connections with consistent performance characteristics. Operating temperature range of 0-70°C accommodates diverse deployment environments from climate-controlled data centers to outdoor network installations. **Standards Compliance & Compatibility:** Fully qualified to IEEE 802.3bs specifications and QSFP-DD MSA standards, the JBX01099 is certified as a drop-in replacement for OEM part number QDD-400G-FR4. This direct compatibility eliminates configuration complexities and ensures seamless integration with Juniper routing and switching platforms. **Safety & Environmental Certifications:** The module meets rigorous international safety requirements including Class 1 Laser designation, TUV certification, UL/FDA approval per 21CFR 1040.10, and EU RoHS/ELV directive compliance. These certifications guarantee safe operation in corporate network environments and compliance with environmental regulations. **Key Benefits:** - 400GB transmission capacity over 2km singlemode fiber - Juniper QDD-400G-FR4 direct compatibility - Duplex LC/UPC connectors for reliable connections - RoHS-compliant, environmentally responsible design - Wide operating temperature range (0-70°C) - 90-day limited warranty with responsive support - Custom brand programming available for enterprise deployments - Free standard shipping on orders exceeding $99 **Ideal Applications:** Perfect for organizations deploying next-generation data center infrastructure, upgrading campus backbone networks, establishing disaster recovery links, or expanding metropolitan area network capacity. Suitable for financial institutions, cloud service providers, research facilities, and enterprise IT departments requiring maximum bandwidth efficiency.