The JBX02176 1000BASE-BX40-D SFP transceiver represents the ideal solution for telecommunications professionals and network administrators seeking high-performance, long-distance optical connectivity. This extended-reach module provides exceptional value for enterprises, service providers, and data center operators who require reliable 1GB transmission capabilities over substantial distances. **Key Performance Features:** Operating at 1490/1310nm wavelengths over 40-kilometer single-mode fiber spans, this transceiver delivers consistent, error-free data transmission. The 9/125 micron fiber core ensures optimal signal integrity while minimizing attenuation losses. With bidirectional (BiDi) capabilities extending beyond standard IEEE 802.3ah specifications, this module maximizes fiber utilization efficiency—a critical advantage for cost-conscious network deployments. **Technical Excellence:** Manufactured with precision-engineered components including a metal case and integrated laser transmitter, the JBX02176 meets the most demanding optical standards. SFF-8472 compliance guarantees interoperability across multiple platform types, though it's specifically optimized for Juniper EX series equipment. The simplex LC/UPC connector provides superior fiber alignment and minimal return loss. **Compliance & Safety:** This module carries comprehensive safety certifications including Class 1 laser designation, TUV approval, UL/FDA compliance (21CFR 1040.10), and full RoHS/ELV compliance per EU directive 2002/95/EC. These certifications ensure safe operation in professional network environments and meet international regulatory requirements. **Reliability & Support:** Backed by a 90-day limited warranty and custom brand programming capabilities, this transceiver provides flexible deployment options. Operating reliably across 0-70°C temperature ranges, it performs consistently in diverse environmental conditions. **Ideal Applications:** Perfect for metro network extensions, campus interconnects, disaster recovery links, and ISP backhaul connections. This module directly replaces Juniper OEM part numbers EX-SFP-GE40KT14R13 and SFP-GE40KT14R13, offering superior cost savings without performance compromise. Ships from convenient US locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99.