Colors in a 48-core optical cable

A 48-core optical cable uses a repeating 12-color sequence for individual fibers, with stripes or tube colors to distinguish groups.

Standard 12-Color Sequence

The TIA-598-C standard defines the following 12 colors for individual fibers: Blue, Orange, Green, Brown, Slate (Gray), White, Red, Black, Yellow, Violet, Rose (Pink), Aqua. These colors are applied sequentially to fibers within a buffer tube or sub-unit .

Applying the Sequence in a 48-Core Cable

For a 48-fiber cable, fibers are typically grouped into four buffer tubes, each containing 12 fibers. Each tube may have a distinct outer color (e.g., Blue, Orange, Green, Brown) to identify the tube, while the fibers inside follow the 12-color sequence. For example:

• Tube 1 (Blue Tube): Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua
• Tube 2 (Orange Tube): Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua
• Tube 3 (Green Tube): Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua
• Tube 4 (Brown Tube): Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua

This hierarchical system ensures that each fiber in the 48-core cable has a unique identification by combining the tube color and the fiber color inside it .

Identification Tips

• Fibers 1–12 are in the first tube, 13–24 in the second, 25–36 in the third, and 37–48 in the fourth.
• If a fiber number exceeds 12, the same 12-color sequence is repeated, often with a stripe or tube color to differentiate the group.
• This system allows technicians to quickly locate and splice fibers without confusion, even in high-density cables .

In summary, a 48-core optical cable uses four groups of 12 fibers, each following the standard 12-color sequence, with tube colors or stripes providing additional identification for each group. This ensures clear, error-free fiber management in installations and maintenance.