The JBX01966 100BASE-BX20-D SFP transceiver module represents a reliable, cost-effective solution for organizations requiring extended-range fiber optic connectivity. Designed as a direct replacement for Extreme Networks part number 10058, this optical transceiver combines superior performance with proven compatibility across enterprise networking infrastructure. **Technical Specifications & Performance** This simplex LC/UPC SFP module delivers consistent 100Mbps throughput over impressive 20-kilometer distances on singlemode fiber (9/125 core). Unlike duplex transceivers, the simplex architecture efficiently manages bidirectional communication on a single fiber strand, reducing deployment complexity and costs. The module operates reliably across industrial temperature ranges (0-70°C), making it suitable for diverse deployment environments including data centers, telecommunications facilities, and outdoor installations. **Safety & Compliance Standards** Manufactured to stringent international standards, the JBX01966 carries Class 1 Laser certification and meets FDA requirements (21CFR 1040.10). Full RoHS/ELV compliance ensures environmental responsibility, while qualification to SFF-8472 specifications guarantees interoperability with standard SFP equipment. TUV and UL certifications further validate reliable operation in demanding networking environments. **Physical Design & Durability** Measuring 5x4x2 inches with precision-engineered metal casing, this transceiver withstands rigorous data center and field environments. The metal case provides essential electromagnetic shielding while the integrated laser transmitter ensures optimal signal transmission. Custom brand programming is available for organizations requiring equipment rebranding. **Applications & Use Cases** Ideal for telecommunications carriers, data center operators, and enterprise IT departments expanding network capacity. Perfect for point-to-point long-distance links, metropolitan area networks (MANs), and campus interconnections requiring cost-effective extended-reach solutions. **Shipping & Support** Ships from multiple U.S. locations with free standard shipping on orders exceeding $99. Backed by 90-day limited warranty and expert technical support.