Which of the following is NOT used as a color for OTH LOBs (with or without audio)?

Which of the following is NOT used as a color for OTH LOBs (with or without audio)?

• A. Broken red
• B. Broken pink
• C. Broken green
• D. Broken dark blue

Answer: (C)

Color coding for OTH LOB indicators is designed so operators can quickly identify which LOB path is involved and whether audio is active, using a small, distinct set of colors. In this scheme, the broken (dashed) status is defined with red, pink, and dark blue to ensure clear visibility and quick recognition. Green isn’t part of the defined palette for broken OTH LOBs, so a broken green line isn’t used. Using green could create confusion with other statuses or be harder to distinguish across different displays and lighting conditions. The other colors listed are the ones defined for this signaling, making broken green the best choice to exclude.

Color coding for OTH LOB indicators is designed so operators can quickly identify which LOB path is involved and whether audio is active, using a small, distinct set of colors. In this scheme, the broken (dashed) status is defined with red, pink, and dark blue to ensure clear visibility and quick recognition. Green isn’t part of the defined palette for broken OTH LOBs, so a broken green line isn’t used. Using green could create confusion with other statuses or be harder to distinguish across different displays and lighting conditions. The other colors listed are the ones defined for this signaling, making broken green the best choice to exclude.