Table 2-A. 25-Pair Cable Termination On A 110-Type Wiring Block/66-Type Connecting Block - AT&T System 75 Wiring Diagram

Table 2-A. 25-Pair Cable Termination on a 110-Type Wiring
Block/66-Type Connecting Block
Connector
Pin
Numbers
2 6
1
27
2
28
3
29
4
30
5
31
6
32
7
33
8
34
9
35
10
25-Pair Cable
Pair Color
W-BL
1
BL-W
W-O
2
O-W
W-G
3
G-W
W-BR
4
BR-W
W-S
5
S-W
R-BL
6
BL-R
7
8
R-BR
9
BR-R
10
110-Type Hardware Description
110-Type
66-Type
Wiring/Conn
Block
Terminals
R-O
O-R
R-G
G-R
R-S
S-R
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
2-5