The JBX02158 1000BASE-BX20 SFP transceiver is a premium optical networking solution engineered for mission-critical network deployments requiring extended-reach capabilities. This module excels in enterprise-grade applications where reliable 1GB connectivity over single-mode fiber is essential. Key Technical Specifications: This transceiver operates on a 9/125 singlemode fiber core, supporting 20km transmission distances—ideal for connecting geographically dispersed network nodes without requiring intermediate amplification. The device utilizes bidirectional technology with 1310/1490nm wavelengths, enabling efficient full-duplex communication over simplex fiber paths. The LC/UPC connector provides superior signal quality and minimal insertion loss compared to alternative connector types. Performance and Compatibility: Designed as a direct replacement for Cisco GLC-BX-U20 modules, this transceiver integrates seamlessly into existing Cisco infrastructure. Its qualified SFF-8472 specification compliance ensures interoperability with standard SFP-compatible equipment. The extended-reach BiDi technology surpasses IEEE 802.3ah specifications, providing enhanced performance margins. Durability and Compliance: Constructed with a robust metal case housing an integrated laser transmitter, this module withstands demanding data center and field deployment environments. Operating temperatures from 0-70°C accommodate diverse climate conditions. Comprehensive certifications include RoHS/ELV compliance, Class 1 laser safety, TUV, UL/FDA approval (21CFR 1040.10), and EU directive 2002/95/EC compliance. Customization and Support: Custom brand programming is available for organizations requiring OEM labeling. The product ships from multiple US locations (Danville, CA and Beaufort, SC) with free standard shipping on qualifying orders. Backed by a 90-day limited warranty, this transceiver provides peace of mind for network infrastructure investments. Applications: Ideal for campus network interconnection, metro-area network (MAN) links, and disaster recovery deployments where cost-effective long-distance fiber connectivity is required.