The JBX02154 1000BASE-BX20-D SFP transceiver is a premium optical networking solution engineered for enterprises and service providers requiring extended-reach connectivity over singlemode fiber infrastructure. With a maximum transmission distance of 20 kilometers, this module is specifically designed for long-haul applications while maintaining full gigabit ethernet performance. Key Technical Specifications: This transceiver operates at 1GB data rates using the 1000BASE-BX20-D standard, qualified to SFF-8472 specifications. It features simplex LC/UPC fiber connectors and operates with 9/125 singlemode fiber cores, ensuring compatibility with existing optical infrastructure. The BiDi (bidirectional) technology enables simultaneous transmission and reception over a single fiber strand, reducing cabling requirements and installation costs. Operational Performance: The module maintains exceptional stability across industrial temperature ranges from -40 to 85°C (-40 to 185°F), making it suitable for diverse deployment environments. The metal case construction provides electromagnetic shielding and enhanced durability, while the integrated laser transmitter delivers consistent optical power output for reliable signal transmission across the full 20km distance. Compliance and Safety: Fully RoHS and ELV compliant, the JBX02154 meets EU directive 2002/95/EC requirements. It carries Class 1 laser safety certification and has been validated by leading international standards bodies including UL, FDA (21CFR 1040.10), TUV, and complies with LN #50 7/2001 specifications. Compatibility and Application: As a direct Cisco GLC-BX-D20-I compatible replacement, this module integrates seamlessly into existing Cisco infrastructure. Custom brand programming is available for OEM applications. Ideal for metropolitan area networks (MANs), campus interconnects, disaster recovery links, and service provider backbone networks. Warranty and Support: Each unit includes a 90-day limited warranty and ships from strategic U.S. locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99. The product is manufactured in Vietnam and China using rigorous quality control standards.