A 48-core trunk optical cable typically uses four 12-fiber bundles, each following the standard 12-color TIA/EIA-598-C sequence: Blue, Orange, Green, Brown, Gray, White, Red, Black, Yellow, Violet, Rose, Aqua.

Detailed Core Arrangement

In a 48-fiber MTP/MPO trunk cable, the fibers are usually organized into four bundles of 12 fibers each. Each 12-fiber bundle follows the standard 12-color sequence:

1. Blue
2. Orange
3. Green
4. Brown
5. Gray (Slate)
6. White
7. Red
8. Black
9. Yellow
10. Violet
11. Rose
12. Aqua For the 48-core cable, the sequence repeats across the four bundles. To maintain unique identification, each bundle may be marked with a stripe or tube color:

• Bundle 1: Blue, Orange, Green, Brown, Gray, White, Red, Black, Yellow, Violet, Rose, Aqua
• Bundle 2: Blue, Orange, Green, Brown, Gray, White, Red, Black, Yellow, Violet, Rose, Aqua (with a stripe or tube identifier)
• Bundle 3: Blue, Orange, Green, Brown, Gray, White, Red, Black, Yellow, Violet, Rose, Aqua (with a different stripe/tube)
• Bundle 4: Blue, Orange, Green, Brown, Gray, White, Red, Black, Yellow, Violet, Rose, Aqua (with another stripe/tube) This “Tube and Fiber” system ensures that each fiber in the 48-core cable can be uniquely identified for splicing, termination, or patching purposes .

Practical Notes

• The MTP/MPO connectors at each end of the trunk cable maintain the same fiber order to ensure 1:1 connectivity across the link .
• The color coding allows technicians to quickly locate and manage fibers in high-density data centers or telecom networks.
• For custom or reversed polarity cables, the fiber sequence may be adjusted, but the base 12-color pattern remains the standard reference . By following this arrangement, a 48-core trunk cable provides organized, high-density connectivity while maintaining compliance with international fiber optic standards.