AT&T System 75 Wiring Diagram page 189

CHAPTER 3. EQUIPMENT ROOM DESIGN
Voice Term Lead Functions
500,*
2500,
7300
7100
Term.
Series
Series
No.
V1T
T
4
V1 R
R
P -
P+
V1T
T
5
V1R
R
P-
P+
T
6
R
P -
P+
Spare
* R1V2/V3 Only
3-106
Table 3-I. System Wiring (Contd)
25-Pair Cable
7400 EIA
Term*
Series
PDM
Att.
TDM
Cons.
TXT TXT
CT
TXR
TXR
CR
PXT
PXT
P-
PXR
PXR
P+
P-
P+
TXT
T X T
CT
TXR
TXR
CR
PXT
P X T
P-
PXR
PXR
P+
P-
P+
V1T
V1R
TXT
CT TXT
TXR
CR TXR
PXT
P - PXT
PXR
PXR
P +
P-
P +
BR2580A
or
D-inside 258A
Cable Adapter
Color Pin
Code Num.
BK-G
38
G-BK
13
BK-BR
39
BR-BK
14
BK-S 40
S-BK 15
Y-BL 41
16
BL-Y
42
Y-O
17
O-Y
43
Y-G
18
G-Y
44
Y-BR
19
BR-Y
45
Y-S
20
S-Y
46
V - B L
21
B L - V
47
V - O
22
O - V
48
V - G
23
G - V
49
V - B R
B R - V
24
50
25
4-Pair Cable
D-Inside
Cable Info.
Color
Outlet
Code
Term.
1
W-BL
2
BL-W
3
W-O
4
O-W
5
W-G
6
G-W
7
W-BR
8
BR-W
1
W-BL
2
BL-W
3
W - O
4
O-W
5
W - G
6
G-W
7
W-BR
8
BR-W
1
W-BL
2
BL-W
3
W - O
4
O - W
5
W - G
6
G - W
7
W - B R
B R - W 8