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Appendix C: Specifications
15.3 RJ21X Telco connector pinout
Color
Function
BLU-WHT Trunk 1 - Tip
ORN-
Trunk 2 - Tip
WHT
GRN-
Trunk 3 - Tip
WHT
BRN-WHT Trunk 4 - Tip
SLT-WHT Trunk 5 - Tip
BLU-RED Trunk 6 - Tip
ORN-RED
Ext 1 - Tip
GRN-RED
Ext 2 - Tip
BRN-RED
Ext 3 - Tip
SLT-RED
Ext 4 - Tip
BLU-BLK
Ext 5 - Tip
ORN-BLK
Ext 6 - Tip
GRN-BLK
Ext 7 - Tip
BRN-BLK
Ext 8 - Tip
SLT-BLK
Ext 9 - Tip
BLU-YEL
Ext 10 - Tip
ORN-YEL
Ext 11 - Tip
GRN-YEL
Ext 12 - Tip
BRN-YEL
Ext 13 - Tip
SLT-YEL
Ext 14 - Tip
70
Pin
Pin
Function
1
26
Trunk 1 - Ring
2
27
Trunk 2 - Ring
3
28
Trunk 3 - Ring
4
29
Trunk 4 - Ring
5
30
Trunk 5 - Ring
6
31
Trunk 6 - Ring
7
32
Ext 1 - Ring
8
33
Ext 2 - Ring
9
34
Ext 3 - Ring
10
35
Ext 4 - Ring
11
36
Ext 5 - Ring
12
37
Ext 6 - Ring
13
38
Ext 7 - Ring
14
39
Ext 8 - Ring
15
40
Ext 9 - Ring
16
41
Ext 10 - Ring
17
42
Ext 11 - Ring
18
43
Ext 12 - Ring
19
44
Ext 13 - Ring
20
45
Ext 14 - Ring
IBM CTS Installation Guide
Color
WHT-BLU
WHT-ORN
WHT-GRN
WHT-BRN
WHT-SLT
RED-BLU
RED-ORN
RED-GRN
RED-BRN
RED-SLT
BLK-BLU
BLK-ORN
BLK-GRN
BLK-BRN
BLK-SLT
YEL-BLU
YEL-ORN
YEL-GRN
YEL-BRN
YEL-SLT
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