The JBX02171 1000BASE-BX40-D SFP Transceiver represents a premium solution for businesses requiring reliable, long-distance fiber optic network connectivity. This sophisticated optical module combines extended 40km reach capability with robust single-mode fiber (SMF) technology, specifically designed for demanding enterprise and carrier networks where distance and reliability are critical performance metrics. **Technical Specifications:** Operating at 1GB data rates, this transceiver utilizes 1490/1310nm wavelengths over 9/125 micron single-mode fiber. The simplex LC/UPC connector design ensures secure, low-loss connections with minimal signal degradation. The compact 5x4x2mm form factor maintains industry-standard SFP compatibility, allowing easy installation in existing switch and router infrastructure without requiring form factor conversions. **Key Features & Benefits:** Extended 40km range eliminates the distance limitations of standard 300-meter SFP modules, enabling cost-effective campus interconnects and metropolitan area network (MAN) deployments. Simplex operation reduces cable requirements, while the LC/UPC connector delivers superior return loss performance. RoHS and EU directive compliance ensures environmental responsibility and regulatory adherence across global markets. Advanced safety certifications (Class 1 Laser, TUV, UL/FDA 21CFR 1040.10) guarantee user safety and equipment reliability. **Compatibility & Integration:** Designed as a direct replacement for Extreme Networks AA1419077 modules, this transceiver integrates seamlessly into existing Extreme Networks environments. Custom brand programming capabilities available for OEM integration requirements. The SFF-8472 qualified design ensures vendor interoperability and future-proof network scalability. **Operational Excellence:** The metal case with integrated laser transmitter provides robust environmental protection, supporting 0-70°C operating temperatures suitable for both controlled data center and challenging outdoor deployment scenarios. Backed by a comprehensive 90-day limited warranty, this transceiver delivers enterprise-grade reliability at competitive pricing. Free standard shipping on qualifying orders, with expedited options available from distribution centers in Danville, CA and Beaufort, SC.