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25-pair colour code Posted September 18, 2004 A 25-pair category 3 telephone cable contains 50 wires. There are 5 groups: white, red, black, yellow, and violet. Each group contains 5 pairs: blue, orange, green, brown, and slate (grey). In each pair, the first wire is group-coloured with a pair-coloured stripe, and the second wire is pair-coloured with a group-coloured stripe. Thus, the first wire of the first pair of the first group is white with a blue stripe. The second wire is blue with a white stripe. --------first wire-------- --------second wire-------
pair# wire colour stripe colour wire colour stripe colour
1 white blue blue white
2 white orange orange white
3 white green green white
4 white brown brown white
5 white slate slate white
6 red blue blue red
7 red orange orange red
8 red green green red
9 red brown brown red
10 red slate slate red
11 black blue blue black
12 black orange orange black
13 black green green black
14 black brown brown black
15 black slate slate black
16 yellow blue blue yellow
17 yellow orange orange yellow
18 yellow green green yellow
19 yellow brown brown yellow
20 yellow slate slate yellow
21 violet blue blue violet
22 violet orange orange violet
23 violet green green violet
24 violet brown brown violet
25 violet slate slate violet
#!/usr/bin/perl
@gcolour = qw(white red black yellow violet);
@pcolour = qw(blue orange green brown slate);
$n = 0;
print " --------first wire-------- --------second wire-------\n";
print "pair# wire colour stripe colour wire colour stripe colour\n";
for $g (@gcolour) {
for $p (@pcolour) {
++$n;
printf ("%5d %-11s %-13s %-11s %-13s\n",
$n, $g, $p, $p, $g);
}
} |