The JBX01385 100GBASE-CWDM4 QSFP28 Transceiver represents a cutting-edge solution for modern enterprise networking environments requiring high-speed, reliable optical connectivity. This transceiver module is engineered to deliver consistent 100Gbps performance over 2-kilometer distances using singlemode fiber infrastructure, making it ideal for data center interconnections, campus networks, and carrier-class deployments. Technical Specifications: This transceiver operates at the IEEE 802.3bm specification standard and maintains full compliance with QSFP28 MSA (Multi-Source Agreement) requirements. The 9/125 micron singlemode fiber core ensures superior signal integrity and minimal signal loss across the 2km transmission distance. The duplex LC/UPC connector configuration provides excellent optical performance with typical insertion loss of less than 0.5dB, meeting enterprise-grade expectations. Key Performance Features: The CWDM4 (Coarse Wavelength Division Multiplexing) technology enables efficient use of fiber bandwidth by separating four distinct wavelengths, allowing simultaneous transmission and reception on a single fiber pair. Operating across a temperature range of 0-70°C, this module maintains stable performance in varied data center environments. The compact QSFP28 form factor (5" x 4" x 2") maximizes port density while maintaining thermal efficiency. Compatibility and Integration: Designed with full Extreme Networks compatibility, this transceiver serves as a direct replacement for OEM part numbers 100G-CWDM4-QSFP2KM, 10404, 100G-QSFP28-CWDM4-2KM, 100G-QSFP28-LR4L-2KM, and 10450. The module features custom brand programming availability, allowing organizations to maintain consistent branding across their optical infrastructure. Compliance certifications include RoHS/ELV directives, Class 1 Laser classification, and TUV/UL/FDA approvals (21CFR 1040.10). Applications and Use Cases: This transceiver excels in data center interconnect scenarios, providing cost-effective 100G connectivity without requiring lengthy fiber runs. It's particularly valuable for campus networks requiring reliable inter-building connectivity within the 2km distance capability. The singlemode fiber support ensures future-proof investment with minimal degradation over time. Quality Assurance: With a 90-day limited warranty and manufactured to stringent quality standards in Vietnam and China, this transceiver undergoes comprehensive testing to ensure reliable operation. Free standard shipping on orders exceeding $99 is available from Danville, CA or Beaufort, SC locations, ensuring rapid deployment support for enterprise customers requiring immediate optical networking solutions.