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Ring Colors
Each color is used for rings of 5 different twisted pairs in a 25-pair binder group. These are the ring colors for
pairs 1 through 5. The sequence repeats for every 5 pairs.
Tip Colors
Each color is used for tips of 5 twisted pairs in a 25-pair binder group. The color changes for each new set of 5
pairs.
25 pair cable is comprised of a wire bundle of 50 conductors, providing a total of 25 pairs or
individuals circuits.
Cables are categorized by their ability to transmit data. Specifications include: Frequency Response,
Maximum Data Rate, Crosstalk, Length Limit and Attenuation.
Binder groups
Each bundle of 25 pairs is called a binder group. Each binder group is
wrapped in a two-colored Mylar ribbon. The sequence of binder group
colors is the same as the sequence of twisted pair colors.
So the first binder group (pair numbers 1 to 25) is wrapped in a white
and blue ribbon. The second binder group (pair numbers 26 to 50) is
wrapped in a white and orange ribbon. There are 24 binder groups (or
600 pairs).