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Template:Registered jack

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Position Pair T/R ± RJ11 RJ14 RJ25 Twisted pair colors 25-pair colors[A] Old colors[B] German colors[C] Australian colors Dutch colors[D] Diagram
1 3 T + Does not appear Does not appear T3 Pair 3 Wire 1 Cat 5e/6
white/green
Pair 4 Wire 1
white/green
Pair 3 wire 1
white
Pair 3 wire 1
pink
Pair 3 wire 1
orange
Does not appear
6P6C connector showing the location of pin 1
2 2 T + Does not appear T2 T2 Pair 2 Wire 1 Cat 5e/6
white/orange
Pair 2 Wire 1
white/orange
Pair 2 Wire 1 Old
black
Pair 2 ext. bell
green
Pair 2 ext. bell
red
Pair 3 wire 1
orange
3 1 R R1 R1 R1 Pair 3 Wire 2 Cat 5e/6
blue
Pair 1 Wire 2
blue/white
Pair 1 Wire 2 Old
red
Pair 1 wire A
white
Pair 1 wire B
blue
Pair 2 ext. bell
red
4 1 T + T1 T1 T1 Pair 1 Wire 1 Cat 5e/6
white/blue
Pair 1 Wire 1
white/blue
Pair 1 Wire 1 Old
green
Pair 1 wire B
brown
Pair 1 wire A
white
Pair 1 wire B
blue
5 2 R Does not appear R2 R2 Pair 3 Wire 1 Cat 5e
orange
Pair 2 Wire 2
orange/white
Pair 2 Wire 2 Old
yellow
Pair 2 ground
yellow
Pair 2 ground
black
Pair 1 wire A
white
6 3 R Does not appear Does not appear R3 Pair 1 Wire 1 Cat 5e
green
Pair 3 Wire 2
green/white
Pair 3 Wire 2
blue
Pair 3 wire 2
gray
Pair 1 Wire 1 Old
green
Does not appear
  1. ^ Established in the 1950s for polyethylene-insulated conductor (PIC) cable.Horn, F. W. (October 1958). "'Even-Count' Cable" (PDF). Bell Laboratories Record. 37 (5): 208–217. Retrieved October 13, 2022.
  2. ^ While the old solid color code was well established for pair 1 and usually pair 2, there are several conflicting conventions for pair 3 (and sometimes even pair 2). The colors shown above were taken from a vendor of silver satin flat 8-conductor phone cable that claims to be standard. 6-pair solid (old) bellwire cables previously used by the Bell System use white for pair 3 tip but some vendors' cable may substitute orange for white. At least one other vendor of flat 8-conductor cable uses the sequence blue, orange, black, red, green, yellow, brown and white/slate.[citation needed]
  3. ^ This color scheme originates in the (withdrawn) national standard DIN 47100. The scheme shown here is the correct color code for interfacing with the RJ connector standards.
  4. ^ "(nl) Support document for the 'PTT norm 88'" (PDF). Watel (in Dutch). p. 8. Archived (PDF) from the original on 2016-10-08.