The JBX01958 is a premium 100BASE-BX20 SFP optical transceiver engineered for demanding networking environments. This extended-reach module enables simplex communication over 20 kilometers of standard singlemode fiber (9/125 micron core), making it perfect for campus networks, metro area connections, and long-distance data transmission applications. Key Technical Features: This transceiver operates at 100Mbps data rates and utilizes bidirectional (BiDi) technology that exceeds standard IEEE 802.3ah requirements. The simplex LC/UPC fiber connector ensures secure, low-loss connections with industry-standard interfaces. Constructed with a robust metal case and integrated laser transmitter, it delivers exceptional signal integrity across 20km distances while maintaining power efficiency. Cisco Compatibility & Reliability: As a direct replacement for Cisco GLC-FE-100BX-U-RGD modules, the JBX01958 installs seamlessly into existing infrastructure without requiring configuration changes. This plug-and-play compatibility reduces deployment time and minimizes operational disruption. The unit qualifies to SFF-8472 extended-reach BiDi specifications, ensuring interoperability across network equipment. Safety & Compliance: Fully RoHS and ELV compliant, this transceiver meets EU Directive 2002/95/EC environmental standards. Class 1 laser certification and FDA 21CFR 1040.10 compliance guarantee safe operation in professional settings. TUV and UL certifications validate durability and performance across global markets. Operating Conditions: With temperature range support from -40 to 85°C, this transceiver performs reliably in diverse climate conditions, from frigid data centers to warm outdoor enclosures. The 90-day limited warranty provides additional peace of mind for enterprise deployments. Value Proposition: The JBX01958 eliminates expensive OEM replacement costs while maintaining full compatibility and reliability. Free standard shipping on orders over $99 makes upgrading your optical infrastructure economical and convenient. Manufactured in Vietnam and China with quality assurance across multiple production facilities, this module represents an intelligent choice for network modernization projects.