The JBX01959 100BASE-BX20 SFP Transceiver is a professional-grade optical module designed for organizations requiring extended-reach, single-direction fiber connectivity. This simplex LC/UPC module represents a cost-effective solution for implementing long-distance network links without requiring expensive multi-mode or duplex systems. **Technical Specifications & Performance:** Operating at 100MB data rates, the BX20 module transmits reliably over 20 kilometers of single-mode fiber infrastructure. The 9/125 micron fiber core ensures minimal signal loss and superior performance compared to multi-mode alternatives. SFF-8472 specification compliance qualifies this module for extended-reach Bidirectional (BiDi) applications that exceed standard IEEE 802.3ah requirements. **Extreme Networks Compatibility:** This transceiver directly replaces Extreme Networks part number 10059, providing plug-and-play integration with compatible network equipment. Whether upgrading existing infrastructure or expanding network capacity, the JBX01959 seamlessly integrates into your Extreme Networks ecosystem without requiring firmware updates or complex configuration. **Build Quality & Safety:** The precision-engineered metal case design protects the integrated laser transmitter from environmental interference while maintaining compact dimensions. Class 1 laser certification, FDA 21CFR 1040.10 compliance, and TUV/UL approvals ensure safe operation in production environments. The module operates across industrial temperature ranges (0-70°C), accommodating diverse installation locations from climate-controlled server rooms to outdoor fiber cabinets. **Environmental Compliance:** RoHS directive compliance and ELV compliance eliminate hazardous substances, aligning with modern sustainability requirements. Suitable for organizations prioritizing environmental responsibility without compromising performance. **Connectivity & Integration:** The simplex LC/UPC connector provides reliable optical connections with minimal return loss. Perfect for point-to-point links, campus networks, and carrier backbone applications. Free standard shipping on orders exceeding $99 offers additional value for fleet purchases. **Support & Warranty:** Backed by a 90-day limited warranty and available custom brand programming options for integration with your organizational standards. Manufactured in Vietnam or China using ISO-certified processes.