The JBX01201 40GBASE-ER4 QSFP+ Transceiver represents a cutting-edge solution for high-speed optical networking. This extended-range module delivers 40 Gigabits per second of throughput over distances up to 40 kilometers using standard single-mode fiber infrastructure, making it an exceptional choice for organizations requiring robust long-distance connectivity without massive infrastructure overhauls. **Technical Excellence:** Built to IEEE 802.3ba specifications, this QSFP+ module operates across the 9/125 single-mode fiber spectrum. The duplex LC/UPC connector design ensures secure, low-loss connections while maintaining industry compatibility. The module's metal case houses advanced laser transmitter technology, providing exceptional performance in demanding network environments. **Compatibility and Integration:** Designed as a direct compatible replacement for Cisco QSFP-40G-ER4 modules, the JBX01201 integrates seamlessly into existing Cisco infrastructure. This compatibility eliminates complex reconfiguration requirements, allowing rapid deployment in production environments. The custom brand programming capability enables organizations to maintain unified equipment identification across their network infrastructure. **Reliability and Safety:** This transceiver exceeds stringent international safety and environmental standards. Class 1 laser certification, TUV approval, UL/FDA compliance, and RoHS/ELV directive adherence ensure safe operation in any setting. The 0-70°C operating temperature range accommodates diverse data center and network environments without thermal concerns. **Performance Benefits:** • Extended 40km reach eliminates signal degradation over long fiber runs • 40GB throughput supports demanding bandwidth requirements • Low-latency operation ideal for real-time applications • FEC (Forward Error Correction) technology enhances data integrity • Duplex LC/UPC connectors provide superior connection reliability **Deployment Scenarios:** Perfect for data center-to-data center connectivity, campus network backbone infrastructure, metropolitan area networks, and enterprise-grade long-haul applications. Organizations benefit from reduced costs versus traditional long-distance networking solutions while maintaining enterprise-grade reliability. **Warranty and Support:** Included 90-day limited warranty provides peace of mind for critical network deployments. Free standard shipping on orders exceeding $99 ensures cost-effective acquisition for volume deployments from dual US locations (Danville, CA and Beaufort, SC).