Mike's PBX Cookbook

RJ21 Amphenol Pinout

50 Pin / 25 Pair RJ21 (Amphenol) telephony connector Colours

  RING (B)

Wire Colour

TIP (A)

Wire Colour

 
1 Blue-White White-Blue 26
2 Orange-White White-Orange 27
3 Green-White White-Green 28
4 Brown-White White-Brown 29
5 Slate-White White-Slate 30
6 Blue-Red Red-Blue 31
7 Orange-Red Red-Orange 32
8 Green-Red Red-Green 33
9 Brown-Red Red-Brown 34
10 Slate/Red Red/Slate 35
11 Blue-Black Black-Blue 36
12 Orange-Black Black-Orange 37
13 Green-Black Black-Green 38
14 Brown-Black Black-Brown 39
15 Slate-Black Black-Slate 40
16 Blue-Yellow Yellow-Blue 41
17 Orange-Yellow Yellow-Orange 42
18 Green-Yellow Yellow-Green 43
19 Brown-Yellow Yellow-Brown 44
20 Slate-Yellow Yellow-Slate 45
21 Blue-Violet Violet-Blue 46
22 Orange-Violet Violet-Orange 47
23 Green-Violet Violet-Green 48
24 Brown-Violet Violet-Brown 49
25 Slate-Violet Violet-Slate 50
       
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