Three Pairs

    1  White/Green   3T
    2  White/Orange  2T
    3  Blue/White    1R
    4  White/Blue    1T
    5  Orange/White  2R
    6  Green/White   3R

    ,-----------,  Tip +
    |1 2 3 4 5 6|  Ring -
    |           |
    `--,     ,--'
       `-, ,-'
         `-'

    RJ14 wiring is the same, but only lines 1 and 2
    are present.  RJ11 only has line 1.  Tip floats
    near ground potential.  Ring is negative with
    regard to the Tip.


25 Pair Colours (U.S.)

  Pair  Tip     Ring
  ~~~~  ~~~~~~  ~~~~~~
    1   White   Blue
    2   White   Orange
    3   White   Green
    4   White   Brown
    5   White   Slate

    6   Red     Blue
    7   Red     Orange
    8   Red     Green
    9   Red     Brown
   10   Red     Slate

   11   Black   Blue
   12   Black   Orange
   13   Black   Green
   14   Black   Brown
   15   Black   Slate

   16   Yellow  Blue
   17   Yellow  Orange
   18   Yellow  Green
   19   Yellow  Brown
   20   Yellow  Slate

   21   Violet  Blue
   22   Violet  Orange
   23   Violet  Green
   24   Violet  Brown
   25   Violet  Slate