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China Unicom 12-core optical cable color chart

China Unicom 12-core optical cable color chart

HOME / China Unicom 12-core optical cable color chart

China Unicom 12-core optical cable color chart - BENNIE OPTICAL [PDF]

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The standard 12-core fiber color sequence for China Unicom cables follows the TIA-598-C standard: Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua.

12-Core Fiber Color Sequence

For a 12-core optical fiber cable, each fiber is assigned a unique color to ensure proper identification during splicing or termination. The TIA-598-C standard, widely used by China Unicom and other telecom operators, specifies the following sequence:

  1. Blue
  2. Orange
  3. Green
  4. Brown
  5. Slate (Gray)
  6. White
  7. Red
  8. Black
  9. Yellow
  10. Violet
  11. Rose
  12. Aqua This sequence repeats for cables with more than 12 fibers, often using color-coded buffer tubes or binder threads to distinguish groups .

Jacket and Connector Colors

  • Single-mode fibers (OS1/OS2) typically have a yellow outer jacket.
  • Multimode fibers: OM3 is usually aqua, OM4 is erika violet or aqua, and OM5 has a distinct color depending on the manufacturer .
  • Connectors: Blue indicates UPC (Ultra Physical Contact), Green indicates APC (Angled Physical Contact), and Aqua is used for OM3/OM4 multimode pigtails .

Identification in High-Count Cables

For cables exceeding 12 fibers (e.g., 24, 48, 144 cores), the 12-color sequence is applied within each buffer tube, and tubes themselves are color-coded to differentiate groups. For example, in a 24-fiber cable:

  • Tube 1 (Blue binder) contains fibers 1–12 in the standard 12-color order.
  • Tube 2 (Orange binder) contains fibers 13–24, repeating the 12-color sequence .

Practical Notes

  • Following the TIA-598-C standard ensures error-free fiber identification and proper network performance.
  • Always match fiber colors at both ends of the cable to avoid misrouting signals.
  • Custom jacket colors or printed legends may be used for in-building distribution or branding, but the internal fiber color sequence remains standard . This color chart is essential for China Unicom network installations, including backbone connections, 5G base stations, and high-density data centers, ensuring consistent and reliable fiber management .
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