C-1
Appendix C.
Pinouts and Cable Specifications
RJ-45 to RJ-21 Pinouts (Amphenol to Modular Jack)
The Amphenol modular 50-pin connector establishes connections to the 8-pin
modular jack through the network (hub) and distribution (house) punch-down
blocks as illustrated below. Wire jacket colors may vary.
RJ-45
Connector
66 Type
Block
RJ-21 Connector
(Amphenol)
White/Blue
Blue/White
White/Orange
Orange/White
White/Green
Green/White
White/Brown
Brown/White
White/Silver
Silver/White
Red/Blue
Blue/Red
Red/Orange
Orange/Red
Red/Green
Green/Red
Red/Brown
Brown/Red
Red/Silver
Silver/Red
Black/Blue
Blue/Black
Black/Orange
Orange/Black
Black/Green
Green/Black
Black/Brown
Brown/Black
Black/Silver
Silver/Black
Yellow/Blue
Blue/Yellow
Yellow/Orange
Orange/Yellow
Yellow/Green
Green/Yellow
Yellow/Brown
Brown/Yellow
Yellow/Silver
Silver/Yellow
Violet/Blue
Blue/Violet
Violet/Orange
Orange/Violet
Violet/Green
Green/Violet
Violet/Brown
Brown/Violet
Violet/Silver
Silver/Violet
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
No Connection
No Connection
1 TD +
2 TD -
3 RD +
6 RD -
1 TD +
2 TD -
3 RD +
6 RD -
26
50
25
50
Port 1
Port 2
Port 3
Port 4
Port 5
Port 6
Port 7
Port 8
Port 9
Port 10
Port 11
Port 12
1
Figure C-1. RJ-45 to RJ-21 Pinouts