The JBX01965 100BASE-BX20-D SFP transceiver represents a premium solution for organizations requiring extended-distance optical network connectivity. This simplex transceiver module is engineered specifically for 20-kilometer transmission over singlemode fiber (9/125 core), making it ideal for metropolitan area networks, campus interconnects, and long-distance point-to-point links. **Key Technical Features:** Designed to SFF-8472 specifications with extended-reach BiDi capability, this transceiver exceeds standard IEEE 802.3ah limitations. The LC/UPC connector provides low-loss, repeatable connections essential for long-distance applications. Operating at 100Mbps, the module maintains consistent performance across industrial temperature ranges from -40°C to 85°C, ensuring reliability in varied deployment environments. **Cisco Compatibility & Integration:** Direct replacement for Cisco GLC-FE-100BX-D-RGD modules, this transceiver offers seamless integration into existing Cisco network infrastructure without requiring firmware updates or configuration changes. Extensive compatibility testing ensures plug-and-play deployment. **Safety & Compliance:** Comprehensive certifications include Class 1 laser safety (LN #50 7/2001), UL, FDA (21CFR 1040.10), and TUV approval. Full RoHS/ELV directive compliance (EU 2002/95/EC) guarantees environmental responsibility and future-proof operation. **Build Quality:** Robust metal case construction with integrated laser transmitter technology provides superior thermal management and operational stability. Manufactured in Vietnam and China, the module undergoes rigorous quality assurance testing. **Value & Support:** 90-day limited warranty provides peace of mind, with custom brand programming available for OEM requirements. Free standard shipping on orders exceeding $99 makes this enterprise-grade solution accessible for projects of all sizes. **Ideal Applications:** - Service provider backbone networks - Enterprise campus fiber interconnects - Data center replication links - Carrier-grade telecommunications infrastructure - Long-distance metropolitan area networks (MANs)