The JBX01415 100GBASE-ER4 QSFP28 Transceiver represents enterprise-grade optical interconnect technology designed for demanding telecommunications and data center applications. This compact yet powerful module achieves 100 gigabits per second (100Gbps) data transmission over single-mode fiber (SMF) cables, supporting transmission distances up to 40 kilometers—ideal for campus networks, metropolitan area networks (MANs), and long-distance data center replication scenarios. **Technical Specifications:** Operating at 100 gigabit Ethernet speeds, the module utilizes proven ER4 (Extended Reach 4) technology with a 9/125 micron single-mode fiber core. The QSFP28 form factor provides industry-standard dimensions (5mm x 4mm x 2mm), allowing seamless integration into existing network infrastructure. Duplex LC/UPC connectors ensure reliable signal transmission with minimal insertion loss and return loss characteristics. **Performance & Reliability:** Qualified to IEEE 802.3bm specifications, this transceiver delivers consistent performance with operating temperatures ranging from 0-70°C. The metal case construction with integrated laser transmitter technology provides robust protection against electromagnetic interference while maintaining precise optical performance. Advanced laser technology ensures low signal degradation over extended distances. **Compliance & Safety:** Full compliance with RoHS (2002/95/EC) and ELV directives demonstrates commitment to environmental responsibility. Multiple safety certifications—including Class 1 Laser, TUV, UL/FDA (21CFR 1040.10), and LN #50 7/2001—validate rigorous quality and safety standards. These certifications provide end-users confidence in deployment within regulated industries. **Cisco Compatibility:** Designed as a direct replacement for Cisco QSFP-100G-ER4-S transceivers, the JBX01415 provides seamless interoperability with existing Cisco network equipment. This compatibility eliminates integration challenges and supports straightforward hardware upgrades. **Value Proposition:** Beyond core functionality, this transceiver offers exceptional value through free standard shipping on orders exceeding $99 and custom brand programming capabilities. The 90-day limited warranty provides reasonable coverage for early defect identification. Ships from established distribution centers in California and South Carolina, ensuring rapid delivery across North America. **Ideal Applications:** - Enterprise data center interconnection and disaster recovery - Metropolitan area network (MAN) backbone infrastructure - Campus network high-speed core connectivity - Long-distance replication and backup systems - Cloud service provider network infrastructure The JBX01415 combines proven ER4 technology with reliable construction and comprehensive compliance certifications, making it a dependable choice for organizations requiring high-capacity, long-distance optical connectivity.