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MAINTENANCE
Table 4-D.
25-Pair Connector to Backplane Designations Contd)
25-Pin-Conn..
Pin No. Wire
Color
DID
Trunk
TN753
Tie
Trunk
TN760B
Aux.
Trunk
TN763
Data
Line
TN726
Analog
Line
TN742
Analog
Line
TN746B
DS1
Interface
TN767
Backplane
Pin No.
(Slots 1-12)
26
1
27
2
28
3
29
4
30
5
31
6
32
7
33
8
34
9
35
10
36
11
37
12
38
13
39
14
40
15
41
16
42
17
43
18
44
19
45
20
46
21
47
22
48
23
49
24
50
25
W-BL
BL-W
W-O
O-W
W-G
G-W
W-BR
BR-W
W-S
S-W
R-BL
BL-R
R-O
O-R
R-G
G-R
R-BR
BR-R
R-S
S-R
BK-BL
BL-BK
BK-O
O-BK
BK-G
G-BK
BK-BR
BR-BK
BK-S
S-BK-
Y-BL
BL-Y
Y-O
O-Y
Y-G
G-Y
Y-BR
BR-Y
Y-S
S-Y
V-BL
BL-V
V-O
O-V
V-G
G-V
V-BR
BR-V
V-S
S-V
T1
R1
T2
R2
T3
R3
T4
R4
T5
R5
T6
R6
T7
R7
T8
R8
GND
GND
T1
R1
T11
R11
E1
M1
T2
R2
T12
R12
E2
M2
T3
R3
T13
R13
E3
ME
T4
R4
T14
R14
E4
M4
T1
R1
SZ1
SZ11
S1
S11
T2
R2
SZ2
SZ12
S2
S12
T3
R3
SZ3
SZ13
S3
S13
T4
R4
SZ4
SZ14
S4
S14
TXT1
TXR1
PXT1
PXR1
TXT2
TXR2
PXT2
PRT2
TXT3
TXR3
PXT3
PXR3
TXT4
TXR4
PXT4
PXR4
TXT5
TXR5
PXT5
PXR5
TXT6
TXR6
PXT6
PXR6
TXT7
TXR7
PXT7
PXR7
TXT8
TXR8
PXT8
PXR8
GND
GND
T1
R1
T2
R2
T3
R3
T4
R4
T5
R5
T6
R6
T7
R7
T8
R8
GND
GND
T1
R1
T2
R2
T3
R3
T4
R4
T5
R5
T6
R6
T7
R7
T8
R8
T9
R9
T10
R10
T11
R11
T12
R12
T13
R13
T14
R14
T15
R15
T16
R16
GND
GND
102
002
103
003
104
004
105
005
106
006
107
007
108
008
109
009
110
010
111
011
112
012
113
013
302
202
303
203
304
204
305
205
306
206
307
207
308
208
309
209
310
210
311
211
312
212
313
213
300
200
L1*
L1
L0
L0
LBACK 2
LBACK 1
4-79