The JBX01955 100BASE-BX20 SFP optical transceiver represents a robust solution for organizations requiring extended-reach network connectivity over singlemode fiber infrastructure. Engineered to SFF-8472 specifications, this bidirectional transceiver achieves impressive 20km transmission distances—double the standard 10km BX10 range—making it ideal for campus networks, metropolitan area networks (MANs), and carrier backhaul applications. **Technical Specifications:** This transceiver operates at 100Mbps using a 9/125 micron singlemode fiber core, ensuring compatibility with existing carrier-class infrastructure. The simplex LC/UPC connector design enables straightforward installation while maintaining signal integrity. Its compact form factor (5x4x2mm) fits seamlessly into standard SFP slots on Brocade switches and compatible networking equipment. **Performance & Reliability:** Manufactured with a metal case housing precision laser transmitter technology, the JBX01955 delivers consistent performance across operational temperature ranges of 0-70°C (32-158°F). Its construction prioritizes stability and longevity, essential for mission-critical network deployments. **Compliance & Safety:** Full RoHS/ELV compliance ensures environmental responsibility, while Class 1 Laser, TÜV, and UL/FDA certifications guarantee safety in professional installations. These certifications meet stringent EU Directive 2002/95/EC requirements, providing peace of mind for global deployments. **Compatibility & Integration:** Direct replacement for Brocade E1MG-100BXD modules, the JBX01955 simplifies equipment upgrades and standardization. Custom brand programming is available for OEM requirements. The transceiver qualifies beyond standard IEEE 802.3ah specifications, offering enhanced capabilities for demanding network scenarios. **Applications:** Ideal for data center interconnects, enterprise backbone networks, telecom infrastructure, and fiber-to-the-premises (FTTP) deployments. This module excels in scenarios where 10km distance limitations prove insufficient, enabling cost-effective network expansion without requiring higher-speed optics. **Value Proposition:** Shipped from Danville, CA or Beaufort, SC with free standard shipping on orders over $99, the JBX01955 combines professional-grade performance with accessibility. The 90-day limited warranty provides manufacturer confidence in product reliability.