The JBX01519 200GBASE-FR4 QSFP56 optical transceiver is a mission-critical networking component designed for data centers, enterprise networks, and high-performance computing environments requiring ultra-reliable connectivity. This module enables 200 gigabit per second data transmission over singlemode fiber infrastructure, supporting transmission distances up to 2 kilometers—ideal for campus interconnects and large data center deployments. **Key Technical Specifications:** This transceiver operates on 9/125 micron singlemode fiber using duplex LC/UPC connectors, ensuring optimal signal integrity and minimal loss. The QSFP56 form factor provides superior density, allowing deployment in high-port-count networking equipment. Qualified to IEEE 802.3cd and QSFP56 MSA standards, the module guarantees interoperability with certified networking platforms. **NVIDIA Mellanox Compatibility:** Purpose-built for NVIDIA Mellanox infrastructure, this module directly replaces OEM part numbers 980-9I055-00H000 and MMS1W50-HM. This compatibility eliminates integration concerns and simplifies deployment in existing Mellanox-based networks. **Safety & Compliance:** Manufactured to stringent industry standards including RoHS/ELV compliance and EU directive 2002/95/EC. Safety certifications include Class 1 laser designation per FDA 21CFR 1040.10, TUV, and UL approval. These certifications ensure safe operation in enterprise environments while meeting environmental sustainability requirements. **Performance & Reliability:** The metal case construction with integrated laser transmitter provides robust protection against electromagnetic interference and environmental factors. Operating temperature range of 0-70°C accommodates diverse deployment scenarios from cooled data centers to edge network locations. Each unit includes a 90-day limited warranty backed by responsive technical support. **Deployment Benefits:** Custom brand programming availability enables OEM and channel partner branding. Free standard shipping on orders exceeding $99 reduces deployment costs. Ships from strategic US locations (Danville, CA and Beaufort, SC) for rapid availability. Whether upgrading existing infrastructure or building new high-speed networks, this transceiver delivers the performance, reliability, and compatibility required for mission-critical operations.