C
ABLES
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
* The "+" and "-" signs are used to represent the polarity of the two
wires that make up each wire pair.
56
50-Pin Telco Pin Assignments
Assign-
Ports
ment*
1, 15
Rx-
1, 15
Tx-
2, 16
Rx-
2, 16
Tx-
3, 17
Rx-
3, 17
Tx-
4, 18
Rx-
4, 18
Tx-
5, 19
Rx-
5, 19
Tx-
6, 20
Rx-
6, 20
Tx-
8, 22
Rx-
8, 22
Tx-
9, 23
Rx-
9, 23
Tx-
10, 24
Rx-
10, 24
Tx-
11, 25
Rx-
11, 25
Tx-
12, 26
Rx-
12, 26
Tx-
13, 27
Rx-
13, 27
Tx-
nc
nc
Pin
Numbers
Ports
26
1, 15
27
1, 15
28
2, 16
29
2, 16
30
3, 17
31
3, 17
32
4, 18
33
4, 18
34
5, 19
35
5, 19
36
6, 20
37
6, 20
38
8, 22
39
8, 22
40
9, 23
41
9, 23
42
10, 24
43
10, 24
44
11, 25
45
11, 25
46
12, 26
47
12, 26
48
13, 27
49
13, 27
50
Assign-
ment*
Rx+
Tx+
Rx+
Tx+
Rx+
Tx+
Rx+
Tx+
Rx+
Tx+
Rx+
Tx+
Rx+
Tx+
Rx+
Tx+
Rx+
Tx+
Rx+
Tx+
Rx+
Tx+
Rx+
Tx+
nc
nc