The JBX01416 100GBASE-ER4 QSFP28 transceiver represents enterprise-grade optical networking technology designed for demanding telecommunications and data center environments. This small form-factor pluggable (SFP) module delivers exceptional performance and reliability for organizations requiring high-capacity, long-distance network connectivity. **Key Technical Specifications:** Operating at 100 gigabits per second (100GB), this transceiver utilizes 100GBASE-ER4 technology to transmit data over distances up to 40 kilometers via standard single-mode fiber. The 9/125 micron core fiber specification ensures compatibility with existing SMF infrastructure while maintaining optimal signal transmission. The duplex LC/UPC connectors provide industry-standard connectivity with minimal insertion loss and exceptional return loss characteristics. **Performance & Compatibility:** This module is fully qualified to IEEE 802.3bm standards and QSFP28 Multi-Source Agreement (MSA) specifications, ensuring interoperability across vendor ecosystems. As a direct replacement for Extreme Networks 100G-4WDM-QSFP40KM transceivers, it integrates immediately into existing Extreme Networks switching infrastructure without additional configuration. **Reliability & Compliance:** Constructed with durable metal casing and advanced laser transmitter technology, this transceiver operates reliably across extended temperature ranges (0°C to 70°C). Comprehensive safety certifications include Class 1 laser designation per LN #50 7/2001, FDA compliance under 21CFR 1040.10, TUV and UL certifications. RoHS and ELV directive compliance ensures environmental responsibility while meeting stringent material restriction requirements. **Application & Use Cases:** Ideal for enterprise data centers, campus backbone networks, and metropolitan area networks (MANs), this transceiver supports critical applications including cloud services, high-frequency trading, video streaming, and large-scale data transfers. The 40km range enables cost-effective long-distance connectivity without regeneration equipment. **Support & Service:** Included 90-day limited warranty provides peace of mind on your investment. Custom brand programming is available for organization-specific requirements. Free standard shipping on orders exceeding $99, with fulfillment from strategically located distribution centers in California and South Carolina ensures rapid delivery. **Specifications Summary:** Dimensions: 5" x 4" x 2" | Data Rate: 100GB | Distance: 40km | Fiber Type: Single-Mode (SMF) | Connectors: Duplex LC/UPC | Form Factor: QSFP28 | Operating Temperature: 0-70°C