AT&T 75 Wiring Manual page 220

110-TYPE HARDWARE
TABLE 3-A. 25-Pair Cable Termination on a 110-Type Wiring Block
3-4
(Contd on Next Page)
25-Pair Cable
Connector
Pin Pair Color
Numbers
1 W-BL
26
1 BL-W
2
27
2
28 3
3
4 W-BR
29
4 BR-W
30 5
5
6 R-BL
31
6 BL-R
7
32
7
8
33
8
34 9 R-BR
9 BR-R
35 10
10
11 BK-BL
36
BL-BK
11
12 BK-O
37
O-BK
12
110-Type
Wiring
Block
Terminals
1
2
W-O 3
4
O-W
5
W-G
6
G-W
7
8
W-S 9
S-W 10
11
12
R-O 13
14
O-R
R-G 15
16
G-R
17
18
19
R - S
20
S - R
21
22
23
24