The JBX02170 1000BASE-BX40-D SFP Transceiver represents cutting-edge optical transmission technology for enterprise and service provider networks. This extended-reach bidirectional module is engineered to deliver exceptional performance across 40-kilometer distances over single-mode fiber, enabling seamless connectivity for demanding networking environments. **Technical Specifications:** This SFP transceiver operates at 1GB data rates with bidirectional transmission capabilities using 1490nm and 1310nm wavelengths. The 9/125 micron single-mode fiber core ensures minimal signal loss and dispersion over extended distances. The simplex LC/UPC connector provides secure, low-loss connections with standard fiber optic infrastructure. Fully compliant with SFF-8472 extended-reach BiDi specifications, this module exceeds standard IEEE 802.3ah requirements. **Performance & Reliability:** Designed for mission-critical applications, the JBX02170 maintains consistent performance across extreme operating temperatures (-40 to 85°C), making it suitable for outdoor and challenging environmental conditions. The metal case construction provides electromagnetic shielding and mechanical protection, while the precision laser transmitter ensures reliable signal transmission. **Compatibility & Integration:** This module is engineered as a direct replacement for Extreme Networks 10056H-40K transceivers, ensuring seamless integration into existing network infrastructure. Compatible with standard SFP slots and LC/UPC fiber patch cables, installation requires minimal configuration. **Compliance & Certifications:** Meeting international safety and environmental standards including RoHS/ELV directives, Class 1 Laser certification, TUV, and FDA 21CFR 1040.10 compliance, this transceiver is suitable for global deployment. Manufacturing in Vietnam and China ensures quality control and cost-effectiveness. **Applications:** Ideal for metropolitan networks, campus backbone connections, long-distance data center links, and carrier-grade telecommunications infrastructure. Perfect for organizations requiring reliable gigabit connectivity beyond standard SFP distance limitations. **Value Proposition:** The JBX02170 delivers enterprise-grade performance at competitive pricing with 90-day limited warranty coverage. Free standard shipping on orders over $99 from convenient U.S. locations (Danville, CA and Beaufort, SC). Custom brand programming available for OEM requirements.