The JBX01358 100G-4WDM-40 QSFP28 transceiver module represents a premium solution for organizations requiring high-capacity, long-distance optical networking. Engineered to IEEE 802.3bm and QSFP28 MSA specifications, this transceiver delivers exceptional performance for datacenter environments, campus networks, and metropolitan area applications. **Key Technical Specifications:** This module supports 100 Gigabit Ethernet transmission over singlemode fiber (9/125μm) with an impressive 40km reach. The QSFP28 form factor provides a compact, hot-swappable design compatible with most modern networking equipment. The 4-wavelength division multiplexing (4WDM) architecture optimizes bandwidth efficiency while maintaining signal integrity across extended distances. **Connectivity & Compatibility:** The duplex LC/UPC fiber connectors offer superior optical performance with minimal insertion loss. As a direct replacement for Cisco's QSFP-100G-4W40-I, this module provides seamless integration into existing Cisco infrastructure without requiring firmware updates or configuration changes. Custom brand programming is available for OEM applications. **Quality & Compliance:** Manufactured to exacting standards in Vietnam and China, this transceiver features a robust metal case with integrated laser transmitter technology. Full compliance with EU Directive 2002/95/EC (RoHS/ELV) ensures environmental responsibility. Multiple safety certifications—including Class 1 Laser approval, TUV, UL, and FDA 21CFR 1040.10—guarantee safe operation in any professional environment. **Performance Characteristics:** Optimized for temperatures ranging from -40°C to 85°C, this module maintains consistent performance in diverse climatic conditions. The transceiver is qualified to transmit low-voltage network signals with minimal signal degradation, making it ideal for mission-critical applications requiring maximum uptime. **Value Proposition:** Shipping from Danville, CA and Beaufort, SC, this transceiver qualifies for free standard shipping on orders exceeding $99. The 90-day limited warranty provides peace of mind for enterprise deployments. Whether upgrading existing networks or building new infrastructure, the JBX01358 delivers professional-grade optical connectivity at competitive pricing.