The pull ring of the optical module adopts the function of using different colors Their main function is to identify the type, wavelength, and function, allowing technicians to quickly determine its type and use case without removing the optical module. This article provides a professional guide on transceiver pull tab color codes by wavelength—spanning SFP, SFP+, CWDM, and BiDi modules—and introduces how LINK-PP standardizes color matching across its optical product lines. Each SFP module operates at a specific wavelength, and to. ① Multimode fiber optic module: The pull tap is black, corresponding to a wavelength of 850nm, suitable for short-distance transmission (such as less than 2km). Purple--Wavelength 1490nm:. These modules convert electrical signals into optical signals, which transmit data over distances of fiber optic cables with minimal power loss. The topic of specifications and physical traits is one aspect of this question; another often-overlooked detail is the color of the pull tab. This modest. Optical module SFP is small package hot swappable modules, mostly is LC Interface, the highest rate can up to 10G at present.
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