The JBX01238 40GBASE-LR4 QSFP+ Transceiver represents a premium solution for organizations deploying high-speed optical networking infrastructure. This advanced transceiver module is engineered to facilitate seamless 40 gigabit-per-second (40GB) data transmission over extended distances using single-mode fiber (SMF) technology. **Technical Specifications & Performance:** Operating at 40 gigabits per second, this transceiver module adheres to IEEE 802.3ba standards and SFF-8436 form factor specifications. The 10-kilometer transmission capability over 9/125 single-mode fiber makes it ideal for campus area networks, metropolitan area networks (MANs), and data center interconnect (DCI) applications. The duplex LC/UPC connector configuration ensures optimal signal integrity and reliable long-term performance. **Construction & Quality:** Built with a rugged metal case and integrated laser transmitter technology, this module delivers enterprise-grade durability and performance consistency. The precision-engineered optical components are manufactured in Vietnam and China to strict quality standards, with comprehensive safety certifications including Class 1 Laser designation, TUV, UL, and FDA 21CFR 1040.10 compliance. **Compatibility & Integration:** Fully compatible with Juniper networking equipment (JNP-QSFP-40G-LR4, QSFPP-40GBASE-LR4, SRX-QSFP-40G-LR4, QSFPP-40G-LR4-C), this transceiver integrates seamlessly into existing infrastructure. The QSFP+ form factor provides compact density in high-port-count switch architectures. **Environmental & Regulatory Compliance:** RoHS and ELV directive compliant (EU directive 2002/95/EC), reducing hazardous substances in accordance with international environmental standards. Operating temperature range of 0-70°C accommodates diverse deployment environments from cooled data centers to semi-outdoor installations. **Warranty & Support:** Includes 90-day limited warranty with custom brand programming available for OEM integration. Free standard shipping on orders exceeding $99 from distribution centers in Danville, CA and Beaufort, SC ensures rapid deployment readiness. Ideal for network architects, systems integrators, and IT professionals upgrading to 40G infrastructure without premium costs associated with OEM modules.