The JBX02186 1000BASE-BX40-U SFP Transceiver represents professional-grade optical connectivity designed for demanding enterprise and service provider networks. This extended-reach module excels in scenarios requiring long-distance, reliable 1GB transmission capabilities without the expense of purchasing proprietary OEM equipment. **Key Performance Features:** Delivering 40km transmission distances over single-mode fiber infrastructure, the JBX02186 utilizes advanced wavelength-division multiplexing (1310nm transmit, 1490nm receive) to enable full-duplex communication across a single fiber strand. The simplex LC/UPC connector provides industry-standard connections with excellent optical performance and minimal signal loss. Compliance with SFF-8472 extended-reach specifications ensures superior performance beyond conventional IEEE 802.3ah standards. **Technical Specifications:** Form Factor: SFP (Small Form-factor Pluggable) Data Rate: 1Gbps (1000BASE-BX40-U) Fiber Type: 9/125 Single-Mode Connector: Simplex LC/UPC Transmission Distance: 40km Operating Wavelengths: 1310nm (TX) / 1490nm (RX) Temperature Range: -10 to 85°C (14 to 185°F) Dimensions: 5.0" x 4.0" x 2.0" **Compatibility & Quality Assurance:** Direct replacement for Brocade E1MG-BXU40, eliminating vendor lock-in costs. Manufactured with precision metal case housing and laser transmitter technology ensuring durability and optimal signal transmission. RoHS/ELV compliant design meets environmental regulations. Class 1 Laser certification, TUV, and FDA 21CFR 1040.10 compliance guarantee safety standards. Custom brand programming available for OEM integration requirements. **Ideal Applications:** Wide-area network (WAN) interconnects, campus network extensions, metro area connections, and carrier-class deployments where extended reach and cost-effectiveness are priorities. Perfect for legacy Brocade infrastructure upgrades seeking compatible alternatives. **Warranty & Support:** 90-day limited warranty provides peace of mind. Ships from strategically located U.S. warehouses (Danville, CA and Beaufort, SC) with free standard shipping on qualifying orders.