The JBX01290 100GBASE-LR4 QSFP28 transceiver represents the latest in high-speed optical networking technology, engineered to meet demanding enterprise connectivity requirements. This module is purpose-built to deliver 100 Gigabit Ethernet speeds over extended distances, specifically supporting 10-kilometer transmissions across single-mode fiber infrastructure. **Technical Specifications:** This transceiver utilizes 9/125 micrometer single-mode fiber with duplex LC/UPC connectors, providing a secure, industry-standard interface. The QSFP28 form factor ensures compact integration into high-density network equipment. Operating temperature range of 0°C to 70°C accommodates diverse deployment environments, from climate-controlled data centers to temperature-variable network closets. **Performance & Compatibility:** Fully qualified to IEEE 802.3bm specifications and QSFP28 MSA standards, this transceiver delivers 100 Gbps data rates with exceptional signal integrity. Direct compatibility with Cisco QSFP-100G-LR4E-S equipment eliminates compatibility concerns, making migration and network expansion straightforward for existing Cisco deployments. **Quality & Compliance:** Manufactured with precision metalwork and advanced laser transmitter technology, the transceiver maintains rigorous safety certifications including Class 1 Laser compliance, UL/FDA recognition, and TUV certification. RoHS and ELV compliance ensures environmental responsibility without compromising performance. **Applications:** Ideal for data center interconnects, campus backbone networks, metropolitan area networks (MANs), and long-distance carrier deployments. Network architects and IT professionals trust this transceiver for mission-critical applications requiring reliable, future-proof 100Gbps connectivity. **Shipping & Support:** Enjoy free standard shipping on orders exceeding $99, with products dispatched from strategic U.S. locations (Danville, CA and Beaufort, SC) for rapid delivery. A comprehensive 90-day limited warranty provides peace of mind. Custom brand programming is available for organization-specific requirements.