The JBX02167 1000BASE-BX40-D SFP Transceiver represents enterprise-class optical connectivity engineered for demanding network infrastructure. This Cisco-compatible module extends your network reach to 40 kilometers over single-mode fiber, enabling cost-effective long-distance Ethernet links without expensive CWDM or DWDM solutions. **Technical Specifications:** Operating at 1GB data rates with 1000BASE-BX40-D standard compliance, the module employs bidirectional transmission using 1490nm and 1310nm wavelengths across a single fiber strand. The 9/125µm single-mode core ensures superior signal quality and minimal attenuation over extended distances. Form factor conforms to SFP standard dimensions (5x4x2mm) for seamless integration into existing equipment. **Performance & Reliability:** Qualified beyond standard IEEE 802.3ah specifications, this transceiver delivers extended-reach capabilities with precision laser transmitter technology housed in a durable metal case. Operating temperature range of -40°C to 85°C accommodates harsh outdoor, rooftop, and industrial cabinet environments. The simplex LC/UPC connector provides secure, low-loss fiber termination. **Compliance & Certification:** Fully RoHS and ELV compliant with comprehensive safety certifications including Class 1 Laser designation, UL/FDA approval, and TUV validation. Manufacturing adheres to international standards with production facilities in Vietnam and China ensuring consistent quality control. **Deployment Applications:** Ideal for metropolitan area networks, campus backbone connections, disaster recovery links, and utility/telecom infrastructure. The module seamlessly replaces Cisco's OEM GLC-BX40-DA-I part number while offering superior value. Custom brand programming available for carrier and enterprise implementations. **Support & Warranty:** Backed by a 90-day limited warranty with free standard shipping on orders exceeding $99. Ships from strategically located US distribution centers for rapid delivery. Compatible with all Cisco equipment supporting standard SFP modules, ensuring plug-and-play deployment with zero compatibility concerns.