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Wireless Data Gateway
4-Wire E&M Card and
NIM Connections
The 4-Wire E&M cards in the AAC are connected to
the 4-Wire NIMs with a cable terminated with 50-position
telco connectors. The pin assignments are shown in
Table B-1.
Table B-1
(1 of 2)
4-Wire NIM/E&M Connector Pin Assignments
Port Number
Designation
1
1
1
1
1
2
2
2
2
2
2
3
3
3
3
3
3
4
4
4
4
4
4
B-2
Pin Number
R
1
T1
27
R1
2
E
28
M
3
T
29
R
4
T1
30
R1
5
E
31
M
6
T
32
R
7
T1
33
R1
8
E
34
M
9
T
35
R
10
T1
36
R1
11
E
37
M
12
4-Wire NIM/E&M Connector Pin Assignments
Port Number
5
5
5
5
5
5
6
6
6
6
6
6
7
7
7
7
7
7
8
8
8
8
8
8
Not Used
Not Used
November 1996
Table B-1
(2 of 2)
Designation
Pin Number
T
38
R
13
T1
39
R1
14
E
40
M
15
T
41
R
16
T1
42
R1
17
E
43
M
18
T
44
R
19
T1
45
R1
20
E
46
M
21
T
47
R
22
T1
48
R1
23
E
49
M
24
SG
25
SB
50
3981-A2-GN31-20
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