The JBX01789 10GBASE-ER SFP+ Transceiver represents a premium solution for enterprise-grade optical networking infrastructure. This extended-range module is engineered to provide reliable, high-speed data transmission across metropolitan and long-distance networks without requiring amplification. **Key Technical Features:** Operating at 1550nm wavelength, the transceiver achieves 10GB data rates with impressive reach capabilities of up to 40km over standard single-mode fiber (SMF) with 9/125μm core diameter. The duplex LC/UPC connector design ensures secure, low-loss connections with minimal signal degradation. This module is fully compliant with IEEE 802.3ae specifications and qualifies under SFF-8431 and SFF-8472 standards, guaranteeing seamless integration with existing Cisco infrastructure. **Superior Design & Construction:** Features a robust metal case with integrated laser transmitter technology, providing durability and consistent performance in demanding data center environments. Dimensions of 5x4x2 inches enable compact installation in standard SFP+ slots without modifications. **Compatibility & Replacement:** Direct compatibility with Cisco SFP-10G-ER systems makes this an ideal replacement for OEM part numbers SFP-10G-ER, SFP-10G-ER-S, and MA-SFP-10GB-ER. Custom brand programming is available for OEM requirements. **Regulatory Compliance:** Manufactured in Vietnam and China, the transceiver meets RoHS/ELV directives (EU 2002/95/EC) and holds Class 1 Laser certification with FDA approval (21CFR 1040.10). Safety certifications include TUV and UL standards, ensuring workplace compliance. **Ideal Applications:** Perfect for metro-area networks (MANs), long-haul enterprise connections, telecommunications infrastructure, and high-speed campus backbone networks. The extended 40km range eliminates the need for optical amplifiers in many applications, reducing deployment complexity and total cost of ownership. **Operational Excellence:** Supports reliable operation across 0-70°C temperature range with 90-day limited warranty. Free standard shipping on orders over $99, with availability from Danville, CA and Beaufort, SC locations for rapid deployment.