The JBX02151 1000BASE-BX20-D SFP transceiver represents a robust solution for organizations requiring extended-reach fiber optic connectivity. This module is engineered to transmit 1GB Ethernet signals across distances up to 20 kilometers over singlemode fiber (SMF), enabling cost-effective long-distance network expansion without requiring additional repeaters or costly infrastructure upgrades. **Key Technical Specifications:** This transceiver utilizes a 9/125 micron singlemode fiber core and features simplex LC/UPC connectors, allowing unidirectional transmission on a single fiber strand. The BiDi (bidirectional) technology enables full-duplex communication by utilizing different wavelengths in each direction, maximizing fiber utilization efficiency. The module measures 5x4x2 inches and features a durable metal case housing the precision laser transmitter. **Compatibility and Integration:** The JBX02151 is directly compatible with Arista networking equipment, specifically replacing the OEM part number SFP-1G-BXD20. This compatibility ensures drop-in deployment without firmware modifications or configuration complexities. The transceiver qualifies to SFF-8472 extended-reach BiDi standards, exceeding standard IEEE 802.3ah specifications. **Performance and Reliability:** Operating across a wide temperature range from 0-70°C (32-158°F), this module delivers consistent performance in various environmental conditions. Safety certifications include Class 1 Laser, TUV, UL, and FDA compliance under 21CFR 1040.10, ensuring safe operation in network environments. **Compliance and Quality:** Fullly RoHS and ELV compliant per EU directive 2002/95/EC, this transceiver meets environmental standards for responsible manufacturing. The module is manufactured in Vietnam and China, maintaining strict quality control protocols. Custom brand programming is available for organizations requiring personalized branding. **Shipping and Support:** Enjoy free standard shipping on orders exceeding $99 from distribution centers in Danville, CA and Beaufort, SC. Each transceiver includes a 90-day limited warranty, providing peace of mind for your network investment.