The JBX01966 100BASE-BX20-D SFP transceiver is a premium optical networking component engineered for enterprise-grade network infrastructure. This module delivers exceptional performance for organizations requiring extended-reach fiber connectivity across campuses, data centers, or metropolitan networks. **Technical Specifications:** Operating at 100MB data rates, this transceiver utilizes single-mode fiber (SMF) with 9/125 micron core specifications, delivering transmission distances up to 20 kilometers. The simplex LC/UPC connector configuration enables efficient fiber management while maintaining superior optical alignment and minimal signal loss. The module measures 5 x 4 x 2 inches with a robust metal case design incorporating advanced laser transmitter technology. **Performance & Compatibility:** Designed specifically for Extreme Networks equipment, the JBX01966 replaces OEM part number 10058 seamlessly. It qualifies beyond standard IEEE 802.3ah specifications for extended-reach bidirectional (BiDi) transmission, providing additional operational flexibility. SFF-8472 compliance ensures broad ecosystem compatibility and future-proof investment protection. **Safety & Compliance:** This optical transceiver meets stringent international standards including RoHS/ELV directives (EU 2002/95/EC), Class 1 laser certification, and UL/FDA requirements (21CFR 1040.10). TUV certification provides additional assurance of reliability and safety. **Operational Benefits:** Operating temperature range of 0-70°C (32-158°F) accommodates diverse deployment environments. The module consumes minimal power while delivering reliable, consistent performance. Custom brand programming capabilities allow organizations to integrate proprietary branding into their network infrastructure. **Warranty & Support:** Every unit includes a comprehensive 90-day limited warranty. Manufactured in Vietnam and China with quality control standards ensuring consistent performance. Ships from US locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99. **Use Cases:** Ideal for enterprise campus networks, metropolitan area networks (MANs), carrier-class deployments, and disaster recovery infrastructure requiring reliable long-distance fiber connectivity without costly rebuilds or major infrastructure modifications.