The JBX01219 40GBASE-LM4 QSFP+ transceiver is a professional-grade optical module designed to meet demanding data center and enterprise networking requirements. This high-performance transceiver provides 40 gigabit per second data rates with exceptional range capabilities, supporting transmission distances up to 150 meters over OM4 multimode fiber and backward compatibility with OM3 installations. **Key Features & Specifications:** This module utilizes singlemode fiber technology with 9/125 core specifications and features duplex LC/UPC fiber connectors for secure, reliable connections. The compact QSFP+ form factor measures 5x4x2 inches, making it ideal for space-constrained deployment environments. Built with a durable metal case and integrated laser transmitter, the transceiver delivers professional-grade durability and performance. **Compatibility & Integration:** Perfectly compatible with NVIDIA Mellanox infrastructure, the JBX01219 directly replaces OEM part number MC2210511-LX4. It's qualified to IEEE 802.3ba standards and SFF-8436 specifications, ensuring seamless integration with existing enterprise systems and future-proof compatibility. **Safety & Compliance:** This transceiver meets stringent international standards including Class 1 laser safety certification, TUV, UL/FDA compliance (21CFR 1040.10), and full RoHS/ELV directive adherence. These certifications guarantee safe operation in professional data center environments. **Ideal Applications:** Perfect for 40GB Ethernet backbone connections, data center interconnects, and high-speed network expansions. Supports enterprise-class reliability with 90-day limited warranty coverage. **Shipping & Support:** Enjoy free standard shipping on orders over $99 from our Danville, CA and Beaufort, SC distribution centers. Custom brand programming available for enterprise deployments.