Cable Colors
The Cabling administration standard(EIA-606) lists the colors and functions of data cabling as:
| Horizontal voice cables |
Blue |
| Inter-building backbone |
Brown |
| Second-level backbone |
Gray |
| Network connections and auxiliary circuits |
Green |
| Demarcation point, telephone cable from Central Office |
Orange |
| First-level backbone |
Purple |
| Key-type telephone systems |
Red |
| Horizontal data cables, computer & PBX equipment |
Silver or White |
| Auxiliary, maintenance & security alarms |
Yellow |