The JBX01119 400GBASE-ER4 QSFP-DD Transceiver represents a cutting-edge solution for organizations requiring ultra-high-speed, long-distance optical networking. Designed specifically for enterprise data centers, carrier networks, and metropolitan area networks (MANs), this transceiver delivers exceptional performance and reliability. Key Technical Specifications: This module operates at 400 gigabits per second using the ER4 (Extended Range 4) specification, capable of transmitting data over singlemode fiber distances up to 40 kilometers without requiring forward error correction. The 9/125 micrometer singlemode fiber core ensures optimal signal integrity across extended distances, making it ideal for inter-data center connectivity and long-haul network applications. Compatibility and Standards Compliance: Fully compatible with Juniper's QDD-400G-ER4-30 transceiver, the JBX01119 serves as a reliable replacement part for existing infrastructure. It adheres to IEEE 802.3bs specifications, QSFP-DD MSA (Multi-Source Agreement), and CMIS (Common Management Interface Specification) standards, ensuring seamless integration with industry-standard networking equipment from major manufacturers. Connectivity and Interface: The duplex LC/UPC fiber connectors provide reliable, low-insertion-loss connections essential for maintaining signal quality over long distances. The UPC (Ultra-Physical Contact) polish delivers superior return loss characteristics, critical for 400G operations. Quality and Certifications: Manufactured in Vietnam and China with rigorous quality control, the transceiver features a robust metal case protecting the precision laser transmitter from environmental interference. It holds multiple safety certifications including Class 1 Laser classification, TÜV approval, UL certification, and FDA compliance (21CFR 1040.10), ensuring safe operation in enterprise environments. Environmental Compliance: RoHS and EU directive 2002/95/EC compliant, the module meets stringent environmental standards, reducing hazardous substance content and supporting sustainable operations. Operational Performance: With operational temperature range from 0-70°C (32-158°F), the transceiver performs reliably across diverse climate conditions. Its compact dimensions (5x4x2 inches) facilitate easy installation in standard QSFP-DD slots. Business Value: The JBX01119 offers significant cost savings compared to OEM alternatives while maintaining full compatibility and performance standards. Free standard shipping on orders over $99 from multiple U.S. locations (Danville, CA and Beaufort, SC) ensures rapid deployment. Custom brand programming is available for organizations requiring private-label solutions. Ideal Use Cases: Perfect for data center interconnects, long-distance service provider networks, financial trading networks requiring ultra-low latency, and government/military secure communications. The 40km range eliminates the need for regenerators in many metropolitan and regional network designs, reducing costs and complexity. Warranty and Support: Backed by a 90-day limited warranty, providing peace of mind for critical network infrastructure investments.