The JBX02155 is a premium 1000BASE-BX20-D SFP transceiver module designed for organizations requiring extended-reach Gigabit Ethernet connectivity. As a direct replacement for Cisco's MA-SFP-1GB-BX20-D, this transceiver maintains full compatibility with existing Cisco infrastructure while delivering superior cost value. **Technical Specifications:** This module operates at 1 Gigabit per second over single-mode fiber (9/125μm core), achieving transmission distances up to 20 kilometers—ideal for metropolitan area networks and campus interconnections. The simplex LC/UPC connector design provides straightforward installation with minimal signal loss at the connection point. Operating across temperatures from 0 to 70°C (32 to 158°F), the transceiver maintains reliable performance in diverse environmental conditions. **Advanced Features:** The device incorporates 1000BASE-BX BiDi (Bidirectional) technology, enabling transmission and reception over a single fiber strand. This innovative approach reduces fiber infrastructure costs and simplifies network design. The metal case construction with integrated laser transmitter ensures durability and optimal thermal management for extended service life. **Safety & Compliance:** Fully certified as a Class 1 laser device under FDA 21CFR 1040.10 and TUV standards, this transceiver meets strict international safety requirements. RoHS and ELV directive compliance ensures environmental responsibility and regulatory adherence across global markets. **Applications:** - Campus network backbone connectivity - Metropolitan area network (MAN) deployments - Data center interconnection - Carrier-class point-to-point links - Telecommunications infrastructure - Long-distance network extensions without regeneration **Quality Assurance:** Each unit includes a 90-day limited warranty and qualifies to industry-standard SFF-8472 specifications for optical transceiver modules. Custom brand programming is available for OEM integration. **Shipping & Support:** Enjoy free standard shipping on orders exceeding $99, with logistics support from Danville, CA or Beaufort, SC locations. This transceiver represents an excellent alternative to original equipment manufacturer modules, delivering enterprise-grade performance at competitive pricing.