AT&T 75 Wiring Manual page 495

Table 4-I provides detailed wiring information for the 25-pair cables, the adapters, and the
information outlets.
Note: Bridged taps must not be used on any part of the station wiring.
Term Lead Functions
500*
2500
Term. 7100 7300
No. Series Series
1 T
R
P-
P+
2 T
R
P-
P+
T V1T
3
V1R
R
P-
P+
* R1V2 or R1V3 Only
TABLE 4-I. System Wiring
(Contd on Next Page)
25-Pair Cable
EIA
7400
Series Term*
Att. PDM
TDM
Cons.
V1T
V1R
CT TXT TXT
CR TXR TXR
P- PXT PXT
PXR
P + PXR
P-
P +
V1T
V1R
CT TXT TXT
TXR
CR TXR
P- PXT
PXT
P + PXR PXR
P-
P +
TXT
CT TXT
TXR TXR
CR
PXT
P- PXT
P + PXR PXR
P-
P +
BR2580A
or
258A
D-Inside
Cable Adapter
Pin
Color
Code Num.
W-BL 26
BL-W 1
27
W-O
2
O-W
W-G 28
G-W 3
W-BR 29
BR-W 4
W-S 30
S-W 5
R-BL 31
BL-R 6
R-O 32
7
O-R
R-G 33
8
G-R
34
R-BR
BR-R 9
R-S 35
S-R 10
BK-BL
36
BL-BK 11
BK-O 37
12
O-BK
66-TYPE HARDWARE
4-Pair Cable
D-Inside
Info.
Cable
Outlet
Color
Code Term.
W-BL 1
2
BL-W
W-O 3
O-W 4
W-G 5
G-W 6
W-BR 7
BR-W 8
W-BL
1
BL-W 2
W-O 3
4
O-W
W-G 5
6
G-W
7
W-BR
BR-W 8
W-BL 1
2
BL-W
W-O 3
4
O-W
W-G
5
G-W 6
W-BR 7
BR-W 8
4-69