The JBX02164 1000BASE-BX40-D SFP transceiver is a high-performance optical module engineered for extended-reach gigabit Ethernet applications requiring distances up to 40 kilometers over single-mode fiber infrastructure. This Brocade E1MG-BXD40 compatible transceiver represents an ideal solution for data center interconnects, campus networks, and telecommunications environments where cost-effective long-distance connectivity is paramount. **Key Features & Specifications:** Operating at 1000BASE-BX40-D standard, this transceiver utilizes duplex wavelengths (1490nm/1310nm) for simultaneous bidirectional transmission over a single fiber strand, eliminating the need for expensive dual-fiber infrastructure. The simplex LC/UPC connector interface ensures reliable, low-loss connections with standard network equipment. Constructed with a robust metal housing and integrated laser transmitter, the module maintains performance across industrial temperature ranges (-10°C to 85°C). **Compliance & Certification:** Fully RoHS/ELV compliant with Class 1 laser safety certification (LN #50 7/2001, TUV, UL/FDA 21CFR 1040.10), this transceiver meets stringent international safety and environmental standards. Qualified to SFF-8472 extended-reach BiDi specifications that exceed basic IEEE 802.3ah requirements, ensuring compatibility with enterprise-grade networking equipment. **Applications & Benefits:** Ideal for organizations modernizing network infrastructure with minimal capital expenditure. Perfect for connecting remote office locations, backup data centers, or expanding fiber networks without extensive trenching or conduit installations. The 40km reach eliminates intermediate repeater requirements, reducing operational complexity and maintenance overhead. **Technical Advantages:** 9/125 single-mode fiber compatibility provides superior performance over multimode alternatives, with lower chromatic dispersion and signal loss at extended distances. Custom brand programming capability allows seamless integration into existing network management systems. Free standard shipping on orders over $99 with 90-day limited warranty coverage. This transceiver directly replaces Brocade E1MG-BXD40 modules, ensuring plug-and-play compatibility without firmware modifications or equipment reconfiguration.