The JBX01396 100GBASE-CWDM4 QSFP28 transceiver is a robust solution for organizations seeking to upgrade their network infrastructure to 100GB speeds while maintaining cost-effective deployment over extended distances. This QSFP28 module is specifically designed to deliver 100GB Ethernet performance across 2 kilometers of single-mode fiber, making it ideal for campus networks, data center interconnects, and metropolitan area network (MAN) applications. **Key Technical Features:** This transceiver utilizes CWDM4 (Coarse Wavelength Division Multiplexing) technology to multiplex four wavelengths over a single fiber pair, optimizing fiber utilization. The 9/125 micron single-mode fiber core ensures minimal signal degradation over distance, while the Duplex LC/UPC connectors provide precision alignment and low insertion loss. Each unit features a metal case with integrated laser transmitters for superior electromagnetic shielding and thermal management. **Specifications & Compliance:** Operating across a wide temperature range from -10 to 85°C (-14 to 185°F), the module maintains consistent performance in diverse deployment environments. It meets IEEE 802.3bm specifications, QSFP28 MSA (Multi-Source Agreement) standards, and SFF-8665 specifications. The transceiver carries comprehensive safety certifications including Class 1 Laser designation, TUV approval, UL certification, and FDA 21CFR 1040.10 compliance. RoHS and ELV compliance ensures environmentally responsible manufacturing and disposal. **Juniper Compatibility:** As a direct replacement for Juniper's QSFP-100G-CWDM4-ET transceiver, this module provides seamless integration with existing Juniper switching and routing infrastructure. Custom brand programming is available for organizations requiring OEM-specific configuration, ensuring complete interoperability with existing network management systems. **Advantages & Applications:** The 2km distance capability positions this transceiver as an excellent alternative to shorter-reach 100GB modules, eliminating the need for signal regeneration or active repeaters in many campus and MAN scenarios. Data centers, cloud service providers, telecommunications carriers, and large enterprise networks benefit from this extended reach at competitive pricing. The module is manufactured to exacting standards with components sourced from Vietnam and China. **Warranty & Support:** Each transceiver includes a 90-day limited warranty covering manufacturing defects. Free standard shipping is available on orders exceeding $99, with units shipped from distribution centers in Danville, CA and Beaufort, SC for rapid delivery.