Pull ring device suitable for optical module
The utility model relates to a pull ring device, in particular to a pull ring device suitable for an optical module, and belongs to the
DR optical module pull ring color
Optical module pull ring colors indicate the module's wavelength, fiber type, and transmission distance, enabling quick identification and proper deployment.
Standard Pull Ring Colors for Common Modules
Multimode Fiber (MMF)
- 850nm – Black pull ring, suitable for short-distance transmission (up to ~550m) on multimode fiber .
Single-Mode Fiber (SMF)
- 1310nm – Blue pull ring, typically used for medium-distance transmission (up to ~10km) on single-mode fiber .
- 1490nm – Purple pull ring, often used in bidirectional (BiDi) applications such as GPON/FTTx .
- 1550nm – Yellow or Green pull ring, used for long-distance transmission; yellow for ~40km, green for ultra-long distances (~80km or more), .
CWDM (Coarse Wavelength Division Multiplexing) Modules
CWDM modules use 18 distinct wavelengths between 1270nm and 1610nm, each with a unique pull ring color. The colors are standardized to allow rapid identification in dense wavelength networks, with prewave (1270–1450nm) and postwave (1470–1610nm) bands .
10G SFP+ and QSFP+ Modules
10G SFP+
- 850nm – Black pull tab for short-range (SR) transmission.
- 1310nm – Blue pull tab for longer reach.
- 1550nm – Red or white pull tab depending on distance (40km = red, 80km = red or white), .
40G QSFP+
- 850nm SR4 – Beige pull tab for short-distance, high-speed data transmission .
BiDi (Bidirectional) Modules
BiDi modules transmit and receive on a single fiber using different wavelengths in each direction. Pull ring colors correspond to the Tx/Rx wavelength pair, providing an intuitive reference for proper pairing during installation .
Practical Importance
Using the correct pull ring color ensures:
- Accurate module identification without removing the transceiver.
- Reduced installation errors and faster troubleshooting.
- Compatibility with fiber type and transmission distance, improving network performance . In summary, pull ring colors serve as a visual guide to quickly determine the wavelength, fiber type, and distance capability of optical modules, which is essential for efficient network management and deployment.
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Meaning of Optical Module Pull Tap Colors
The color of the optical module pull tap is not just for aesthetics. Its core function is to quickly identify the module''s
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