The JBX01358 100G-4WDM-40 QSFP28 transceiver is a professional-grade optical module engineered for high-speed, long-distance network communications in enterprise and data center environments. This transceiver is a direct replacement for Cisco's QSFP-100G-4W40-I, offering proven compatibility and reliable performance. **Technical Specifications:** This module delivers 100GB data transmission rates over singlemode fiber (9/125μm core) with an impressive 40km reach, making it suitable for metropolitan area networks (MANs) and wide area network (WAN) applications. The form factor follows the QSFP28 standard, ensuring seamless integration into compatible equipment. Duplex LC/UPC fiber connectors provide secure, low-loss connections with reliable performance over extended distances. **Performance & Reliability:** Qualified to IEEE 802.3bm specifications and QSFP28 Multi-Source Agreement (MSA) standards, the transceiver guarantees interoperability across major network platforms. Operating temperature range of -40°C to 85°C ensures stable performance in diverse environmental conditions, from temperature-controlled data centers to field deployments. **Compliance & Safety:** This module meets stringent regulatory requirements with RoHS/ELV compliance and EU directive 2002/95/EC certification. Safety certifications include Class 1 Laser designation, TUV, UL, and FDA 21CFR 1040.10 approval, ensuring safe operation in professional network environments. **Quality & Support:** Constructed with premium materials including metal case housing and precision laser transmitter technology, the transceiver delivers exceptional durability and longevity. Each unit includes custom brand programming availability and a 90-day limited warranty. **Shipping & Availability:** Enjoy free standard shipping on orders over $99, with convenient fulfillment from Danville, CA or Beaufort, SC locations, ensuring quick delivery for urgent network upgrades.