The JBX01789 10GBASE-ER SFP+ transceiver represents a premium solution for organizations requiring extended-range optical connectivity in their network infrastructure. This single-mode fiber (SMF) transceiver is specifically designed to support 10Gbps Ethernet transmission over distances reaching 40 kilometers, making it an excellent choice for enterprises needing reliable long-distance network connections without the expense of additional infrastructure investments. **Technical Performance & Specifications:** Operating at 1550nm wavelength, the 10GBASE-ER transceiver provides optimal performance for long-reach applications. The module fully adheres to IEEE 802.3ae standards, ensuring compatibility with industry-standard equipment and predictable performance metrics. With its compact 5mm x 4mm x 2mm form factor, the SFP+ module fits seamlessly into standard SFP+ cage slots without requiring additional space or modifications. **Key Features & Benefits:** The duplex LC/UPC connectors deliver low-insertion-loss connections crucial for maintaining signal integrity over extended distances. The precision laser transmitter within the metal case housing ensures stable, reliable operation throughout the product's lifecycle. As a drop-in replacement for Cisco SFP-10G-ER modules, this transceiver eliminates compatibility concerns and reduces deployment time. **Regulatory Compliance & Safety:** Fully RoHS and ELV compliant, this transceiver meets EU directive 2002/95/EC requirements and adheres to stringent environmental standards. Class 1 laser certification (FDA 21CFR 1040.10, TUV, UL) confirms safety for personnel and network environments. The module includes digital diagnostics via SFF-8472 DDM capabilities, enabling remote monitoring of optical power levels, temperatures, and other critical parameters. **Ideal Applications:** Perfect for metropolitan area network (MAN) interconnects, campus backbone connections, and service provider networks requiring cost-effective long-distance solutions. Suitable for data centers, financial institutions, and enterprise networks where reliable optical transport is mission-critical. **Shipping & Support:** Ships from multiple U.S. locations (Danville, CA and Beaufort, SC) with free standard shipping on orders over $99. Each transceiver includes custom brand programming availability for seamless integration into branded network environments. The 90-day limited warranty provides peace-of-mind protection for your optical network investment.