The JBX01359 100G-4WDM-40 QSFP28 transceiver represents cutting-edge optical networking technology for modern enterprise and carrier-class deployments. This module delivers exceptional performance for 40-kilometer transmissions over singlemode fiber, making it ideal for campus interconnects, metro networks, and long-haul data center applications. **Technical Excellence**: Operating at 100 Gigabits per second, this transceiver employs advanced 4-channel wavelength division multiplexing (4WDM) to maximize fiber utilization. The 9/125 micron singlemode fiber core supports extended reach capabilities while maintaining signal integrity. With IEEE 802.3bm and QSFP28 MSA certification, this module guarantees compatibility with standards-compliant networking equipment. **Superior Connectivity**: The duplex LC/UPC fiber connectors provide industry-standard connections with minimal insertion loss, ensuring reliable signal transmission. The precision-engineered metal case houses a laser transmitter capable of performing across extreme temperatures from -40°C to 85°C, making it suitable for diverse deployment environments. **Compliance & Safety**: This transceiver exceeds global regulatory requirements with RoHS/ELV compliance, Class 1 Laser certification, and UL/FDA approvals per 21CFR 1040.10. The TUV certification and EU directive 2002/95/EC compliance ensure safety and environmental responsibility. **Juniper Compatibility**: As a direct compatible replacement for Juniper's QSFP-100G-4WDM40-I module, this transceiver integrates seamlessly into existing Juniper network deployments without requiring firmware updates or configuration changes. **Value-Added Services**: Custom brand programming is available for OEM and reseller applications. Free standard shipping on orders over $99, with product manufactured in Vietnam and China using quality-controlled processes. Each module includes a 90-day limited warranty and ships from strategic U.S. locations in California and South Carolina for rapid delivery. **Ideal Applications**: Perfect for data center interconnects, carrier-grade metro networks, enterprise campus fiber runs, and cloud infrastructure expansion. The 40km reach eliminates the need for regenerators in many long-distance scenarios, reducing operational complexity and total cost of ownership.