External Cable Colour Code
The table below gives the colour-coding for external communications cables up to 100 pairs. The colour-code is based on the five-colour sequence of Blue, Orange, Green, Brown, Slate which are used in that order with a White mate for the first five pairs.
Knowing this sequence of five colours allows you to easily determine the order of the remaining pairs as follows: The next five pairs use a Red mate (in place of the white mate), again using the "Line -" colours of Blue, Orange, Green, Brown, Slate. The first ten pairs are bound together by a Blue binder-tape.
The second ten pairs repeat the sequence above, the only difference is that they are bound together with an Orange binder-tape. The binder-tape colour-sequence is shown below.
|Pair||Line +||Line -|