The JBX01237 40GBASE-LR4 QSFP+ Transceiver represents cutting-edge optical networking technology designed for demanding enterprise environments. This high-capacity transceiver module delivers exceptional 40GB data transmission capabilities over extended distances, specifically engineered for 10-kilometer singlemode fiber (SMF) links with 9/125 micron core specifications. **Key Technical Features:** This QSFP+ module operates in full compliance with IEEE 802.3ba and SFF-8436 industry standards, ensuring interoperability across diverse network infrastructures. The duplex LC/UPC fiber connectors provide secure, low-loss connections with industry-standard physical contact specifications. Supporting both transmission and reception over a single singlemode fiber pair, this transceiver maximizes bandwidth efficiency for metropolitan and campus network deployments. **Performance & Reliability:** The precision laser transmitter, encased in durable metal housing, delivers consistent 40GB performance across the full 0-70°C operating temperature range. This wide temperature tolerance ensures reliable operation in both climate-controlled data centers and outdoor network equipment enclosures. **Safety & Compliance:** Designed with Class 1 laser classification and backed by rigorous safety testing (TUV, UL, FDA 21CFR 1040.10), this transceiver meets stringent international safety requirements. Full RoHS and ELV directive compliance ensures environmental responsibility without compromising performance. **Compatibility & Integration:** The JBX01237 is explicitly designed as an Intel E40GQSFPLR-compatible replacement, providing seamless integration into existing systems. Custom brand programming is available for OEM requirements. **Applications:** Ideal for data center interconnects, campus network expansion, disaster recovery links, and service provider metropolitan networks requiring reliable, high-capacity optical transmission. Backed by a 90-day limited warranty and offering free standard shipping on orders over $99, this transceiver delivers both value and peace of mind for mission-critical network infrastructure investments.