ZX – Also known as “Extended Wavelength” – are optimized for transmission via singlemode fiber at 1550 nm over long-distances up to 80 km and are used in long-haul telecoms networks, metropolitan areas, etc. Note: These modules comply. Utilizing a 1550nm laser over single-mode fiber, it achieves an ultra-long transmission distance of up to 80 kilometers, making it ideal for connecting networks across cities, campuses, and industrial parks. It provides high-speed, stable 1Gbps data transfer for bandwidth-intensive tasks like HD. The ZX SFP module is a long-haul SFP that provides a 1000BASE-X optical connection using LC connectors and SMF cable up to 80 km long. For a complete listing of hardware compatible with these modules, see the Extreme Optics Compatibility website.