The JBX01957 100BASE-BX20 SFP transceiver is a premium networking solution engineered for enterprises requiring extended-reach fiber connectivity. This advanced BiDi (bidirectional) transceiver extends beyond standard IEEE 802.3ah specifications, delivering 100MB data rates across distances up to 20 kilometers—ideal for metropolitan area networks, campus interconnections, and disaster recovery sites. Key Technical Features: - 100BASE-BX20 technology with simplex LC/UPC connectors - 9/125µm singlemode fiber core for optimal signal integrity - Extended-reach BiDi transmission beyond IEEE 802.3ah standards - Compact SFP form factor (5 x 4 x 2 dimensions) for space-efficient deployment - Metal case construction with integrated laser transmitter Compliance & Safety: This transceiver maintains full compliance with RoHS/ELV directives and EU 2002/95/EC regulations, ensuring environmentally responsible operations. Multiple safety certifications including Class 1 Laser, TUV, UL, and FDA (21CFR 1040.10) guarantee safe, reliable operation in professional network environments. Cisco Compatibility: Direct replacement for OEM part GLC-FE-100BX-U, fully compatible with Cisco switching infrastructure. Qualified to SFF-8472 specifications for seamless integration into existing systems. Performance & Reliability: - Operating temperature range: 0-70°C (32-158°F) - 90-day limited warranty protecting your investment - Custom brand programming available for white-label solutions Applications: Perfect for carriers, service providers, and enterprises building resilient network infrastructure. Supports metropolitan networks, building-to-building connectivity, and long-distance data center replication without expensive dark fiber or expensive long-reach equipment. Shipping & Support: Ships from multiple US locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99. Order with confidence knowing you're receiving a standards-qualified, professionally certified transceiver backed by comprehensive warranty coverage.