The JBX02150 1000BASE-BX20 SFP transceiver is a sophisticated optical module purpose-built for enterprise-grade long-distance networking applications. Delivering Gigabit Ethernet speeds across 20 kilometers of single-mode fiber infrastructure, this transceiver represents an economical solution for extending network reach without requiring expensive long-haul equipment. **Key Technical Specifications:** Operating at 1550/1310nm wavelengths, this bidirectional transceiver utilizes single-mode fiber (9/125 micron core) for superior performance and minimal signal degradation over extended distances. The simplex LC/UPC fiber connector provides industry-standard connectivity with excellent optical performance and durability. Qualified to SFF-8472 extended-reach BiDi specifications, it exceeds basic IEEE 802.3ah requirements, ensuring compatibility with sophisticated network infrastructures. **Feature Highlights:** The module features a robust metal case with integrated laser transmitter technology, designed for reliable operation in demanding environments. Operating across a temperature range of 0°C to 70°C (32°F to 158°F), it maintains performance consistency in varied deployment conditions. Comprehensive safety certifications including Class 1 Laser, TUV, UL/FDA, and 21CFR 1040.10 compliance ensure safe operation in mission-critical settings. **Compatibility & Replacement:** Direct replacement for Cisco GLC-BX53-D20 modules, eliminating compatibility concerns. This transceiver integrates seamlessly into existing Cisco infrastructure without requiring reconfiguration. Custom brand programming is available for organizational standardization and asset management purposes. **Compliance & Environmental:** RoHS and ELV compliant, reflecting commitment to environmental responsibility and regulatory adherence. Manufactured in Vietnam and China using quality-assured processes. **Ideal Applications:** Perfect for metro Ethernet deployments, campus network extensions, disaster recovery links, and service provider interconnections requiring cost-effective long-distance transmission. The 90-day limited warranty demonstrates manufacturer confidence in reliability and performance quality.