The JBX01372 100GBASE-BX20-U QSFP28 Transceiver represents cutting-edge optical networking technology designed to meet the demanding requirements of modern high-speed data communications. This single-channel, unidirectional transceiver module delivers 100 Gigabit Ethernet performance across extended distances of up to 20 kilometers over standard single-mode fiber infrastructure. Key Technical Specifications: This module operates on 9/125 micron single-mode fiber with simplex LC/UPC connectivity, utilizing a single fiber strand for transmission. The QSFP28 form factor provides exceptional density while maintaining thermal efficiency across operating temperatures of 0 to 70°C (32 to 158°F). With a 5x4x2 inch footprint and metal case construction, it delivers durability alongside space-efficient deployment. Performance & Compatibility: Designed to replace OEM part QSFP-100G-BX20U-S, this transceiver achieves full Cisco compatibility and qualifies to IEEE 802.3bm specifications and QSFP28 MSA standards. The integrated laser transmitter and precision optical components ensure signal integrity over extended distances, making it suitable for enterprise, service provider, and data center network environments. Safety & Compliance: Comprehensive safety certifications include Class 1 Laser designation, TUV, and UL/FDA 21CFR 1040.10 compliance. Full RoHS (Directive 2002/95/EC) and ELV directive adherence ensures environmental responsibility and regulatory alignment across global markets. Manufacturing in Vietnam and China maintains quality standards while optimizing cost efficiency. Business Benefits: Free standard shipping on orders exceeding $99 reduces total acquisition costs. Custom brand programming availability accommodates OEM integration and white-label requirements. The 90-day limited warranty provides protection for business-critical deployments. Sourcing from Danville, CA and Beaufort, SC locations ensures rapid domestic delivery. Applications & Use Cases: Ideal for metropolitan area networks, campus interconnects, disaster recovery replication, and data center fabric extensions. The 20km reach eliminates need for additional regeneration equipment in many deployment scenarios, reducing operational complexity and infrastructure costs while maintaining 100Gbps throughput consistency throughout the link budget. This transceiver is the optimal choice for organizations requiring reliable, standards-compliant 100 gigabit connectivity over extended single-mode fiber distances.