The JBX01985 100BASE-ZX SFP Transceiver Module represents a premium solution for network professionals requiring extended-distance optical connectivity. Engineered to exacting standards, this transceiver delivers enterprise-grade performance for metropolitan and long-haul network applications. **Technical Excellence:** This single-mode fiber transceiver operates at 1550nm wavelength—the optimal wavelength for extended-distance transmission over single-mode fiber infrastructure. With 9/125 micron fiber core specifications, it achieves impressive 80-kilometer transmission distances without signal degradation. The 100Mbps data rate handles bandwidth-intensive applications while maintaining clarity and consistency across extended cable runs. **Superior Compatibility:** Designed as a direct replacement for Cisco GLC-FE-100ZX modules, the JBX01985 integrates seamlessly into existing Cisco network environments. This compatibility eliminates costly equipment replacement cycles and simplifies network upgrades. The standardized SFP form factor enables flexible deployment across compatible switches, routers, and network appliances. **Robust Construction:** The metal case with integrated laser transmitter provides durability and thermal stability in demanding network environments. Duplex LC/UPC fiber connectors ensure reliable, low-loss connections with minimal signal reflection. The precision-engineered components work together to deliver consistent performance across temperature ranges from 0°C to 70°C. **Compliance & Certifications:** This module exceeds industry standards including IEEE 802.3u specifications for 100BASE-FX Ethernet over fiber. Multiple safety certifications (Class 1 Laser, UL/FDA, TUV) confirm its safety and reliability. RoHS and ELV directive compliance ensures environmental responsibility. **Ideal Applications:** • Metropolitan area network (MAN) connectivity • Campus network backbone connections • Data center to remote facility links • Long-distance Ethernet extensions • Enterprise backup and disaster recovery networks **Backed by Warranty:** A 90-day limited warranty protects your investment. Custom brand programming is available for organizations requiring OEM labeling. Free standard shipping on orders exceeding $99 ensures cost-effective procurement. The JBX01985 represents the convergence of affordability and performance—delivering professional-grade optical networking without premium pricing.