The JBX02166 1000BASE-BX40-D SFP transceiver represents an optimized solution for organizations deploying long-distance Gigabit Ethernet networks. This optical module delivers 1Gbps throughput over 40 kilometers using standard singlemode fiber infrastructure, making it ideal for campus interconnects, metro-area networks, and long-reach backbone applications where fiber upgrades are impractical or cost-prohibitive. Key Technical Specifications: Operating at 1490nm (transmit) and 1310nm (receive), this BiDi transceiver employs wavelength division multiplexing to enable simultaneous bidirectional communication over a single fiber strand. The compact SFP form factor integrates seamlessly into existing network equipment slots, supporting hot-swappable installation without system downtime. With a maximum transmission distance of 40km over 9/125 singlemode fiber, the module delivers performance beyond standard IEEE 802.3ah specifications, qualifying as extended-reach BiDi technology. Robustness and Compliance: Constructed with a reinforced metal case and precision laser transmitter, this transceiver withstands demanding network environments. Full RoHS/ELV compliance meets international environmental regulations, while Class 1 Laser safety certification (LN #50 7/2001) and TUV/UL/FDA certifications ensure operator safety. The simplex LC/UPC connector provides industry-standard fiber termination with low insertion loss characteristics. Compatibility and Flexibility: Designed as a drop-in replacement for Cisco GLC-BX-D40 modules (P/N: GLC-BX-D40, MA-SFP-1GB-BX40-D), the JBX02166 integrates into existing Cisco infrastructure without configuration changes. Custom brand programming is available for enterprises requiring OEM rebranding. Operating temperature range of 0-70°C ensures reliable performance in varied deployment scenarios. Value Proposition: By leveraging existing fiber infrastructure for extended distances, this transceiver eliminates expensive fiber plant upgrades while delivering reliable Gigabit connectivity. The 90-day limited warranty and rapid US-based shipping (from California and South Carolina) support immediate deployment needs. For network architects seeking cost-effective long-distance optical solutions, the JBX02166 delivers proven performance and seamless Cisco compatibility.