SFP 155M 15km is a series of SFP with speed rate up to 155Mbps and transmission distance up to 15km. The Small Form Factor Pluggable (SFP) transceiver module is specifically designed for high performance integrated duplex data link over single mode optical fiber. Long-distance variants, typically referred to as LX, EX, ZX, or ER/LR SFPs, are engineered with higher optical power budgets and longer wavelength. When engineers search for “SFP wavelength,” they are typically trying to answer a practical deployment question: Which optical wavelength should I use—850 nm, 1310 nm, or 1550 nm—and why does it matter? The answer directly affects fiber compatibility, transmission distance, link stability, and. Choosing the right optical module requires evaluating multiple factors, including fiber type, wavelength (850nm vs. 1310nm), link budget, and real installation conditions, rather than relying solely on datasheet specifications. In this guide, we will break down what SFP distance really means, how. In optical communication, SR and LR SFP modules are among the most widely used solutions, mainly distinguished by their transmission distance, wavelength, and the type of fiber they require. In this article, we'll show you 10 simple yet extremely effective rules to help you get the maximum range from your SFP+ connections.
