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. So what are the specific differences in their parameters?
1 The color of pull ring for ordinary optical module
1.1 Single-mode fiber
- Blue: 1310nm wavelength (Gigabit/10G module)
- Yellow: 1550nm wavelength (long-distance transmission, such as over 40km)
- Purple: 1490nm wavelength (commonly used in PON networks)
- Green: Over 80km ultra long distance module
- Red: 1550nm wavelength (40km distance)
1.2 Multimode fiber
- Black: 850nm wavelength (short distance transmission)
1.3 Special function
- Colorless/Transparent: Tested or unclassified fiber optic
- Gray: 1470nm or 1310nm band of CWDM module
- Orange/Brown: Single fiber bidirectional module (BIDI) or CWDM specific band
2 The color of CWDM optical module pull ring
The color and wavelength correspondence of the pull ring of CWDM module is more complex, commonly seen as follows:
3 Others
Quick distinction between single-mode and multi-mode:
- Black pull rings usually indicate multimode (850nm);
- Blue/yellow/purple are generally used for single-mode.
Color universality: The same color may correspond to different wavelengths in different scenarios (such as green representing ultra long distance in conventional modules and 1530nm in CWDM).
These color codes have a wide range of applications in environments such as data centers, enterprise LANs, and wide area networks. By quickly identifying light modules through color, engineers can more efficiently complete network upgrades and expansions, reducing the possibility of errors occurring.
