The JBX02172 1000BASE-BX40-D SFP transceiver module represents a premium solution for long-haul optical network connectivity. Designed to meet the demands of modern data center, campus, and wide-area network (WAN) architectures, this extended-reach bidirectional transceiver delivers reliable gigabit performance across distances up to 40 kilometers over single mode fiber. **Technical Specifications:** Operating at 1Gbps with 1490/1310nm wavelength configuration, the BX40-D module supports simplex transmission over 9/125 single mode fiber. The compact SFP form factor (5x4x2 dimensions) integrates seamlessly into standard SFP ports on switches, routers, and media converters. Simplex LC/UPC connectors provide secure, low-loss fiber connections, while the precision laser transmitter ensures signal integrity across extended distances. **Performance & Reliability:** Qualified to SFF-8472 extended-reach specifications and IEEE 802.3ah standards, this transceiver exceeds industry benchmarks for optical performance. Operating temperature range of 0-70°C (32-158°F) accommodates diverse deployment environments. The metal case construction with integrated laser transmitter provides electromagnetic shielding and thermal management for consistent, long-term reliability. **Compliance & Certification:** Full RoHS/ELV compliance ensures environmental responsibility. Class 1 laser certification, UL/FDA approval (21CFR 1040.10), and TUV certification confirm safety standards. CE compliance with EU directive 2002/95/EC supports global deployment. **Compatibility & Integration:** This module is fully compatible with Extreme Networks equipment and directly replaces OEM part AA1419077-E6. Custom brand programming is available for OEM applications and bulk deployments. Ships from multiple U.S. locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99. **Use Cases:** Ideal for enterprise campus networks, service provider backhaul, data center interconnection, and remote site connectivity. The 40km reach enables cost-effective network expansion without intermediate regeneration equipment. Perfect for organizations requiring reliable, standards-compliant optical connectivity with Extreme Networks infrastructure. **Warranty & Support:** Backed by a 90-day limited warranty, ensuring peace of mind with your investment. Technical support available for integration and troubleshooting assistance.