The JBX02170 1000BASE-BX40-D SFP optical transceiver is a high-performance, long-distance networking solution engineered for critical infrastructure applications. Delivering 1 Gigabit per second throughput across distances up to 40 kilometers, this module addresses the growing demand for cost-effective, extended-reach fiber optic connectivity. **Technical Excellence:** This bidirectional transceiver utilizes advanced laser transmission technology on a 9/125µm single-mode fiber platform. Operating on 1490nm (downstream) and 1310nm (upstream) wavelengths, the module achieves superior signal integrity and minimal attenuation over extended distances. Full compliance with SFF-8472 specifications ensures interoperability across diverse network ecosystems, while exceeding base IEEE 802.3ah standards for extended BiDi applications. **Robust Construction:** Features a durable metal case housing precision-engineered optics and laser transmitter components. The simplex LC/UPC connector provides reliable, low-loss connections with minimal backreflection. Rated for industrial environments, the transceiver maintains peak performance across the full -40°C to 85°C operating temperature range—essential for outdoor, uncontrolled, or temperature-variable installations. **Compliance & Certification:** Meets stringent international standards including RoHS/ELV directives (EU 2002/95/EC), Class 1 Laser safety classifications, and certifications from TUV, UL, and FDA (21CFR 1040.10). These credentials ensure safe deployment in regulated industries and environments with strict compliance requirements. **Seamless Integration:** A direct replacement for Extreme Networks 10056H-40K modules, the JBX02170 integrates into existing deployments without modification. The industry-standard SFP form factor supports hot-swappable operation, minimizing downtime during installation or upgrades. **Applications:** Ideal for campus area networks, metropolitan networks, carrier-grade deployments, and any application requiring gigabit connectivity beyond typical short-reach limitations. Perfect for remote site connectivity, fiber backbone extensions, and disaster recovery network segments. **Service & Support:** Includes a 90-day limited warranty. Custom brand programming available for OEM and reseller requirements. Ships from U.S. locations (Danville, CA or Beaufort, SC) with free standard shipping on orders exceeding $99.