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Hardware Installation 17
Model 3124 User Manual 2 • Hardware Installation
The pin assignment of Line/POTS interface is illustrated below (the numbers in the connector figures below
represent PIN numbers).
• For Ports 1-24:
• For Ports 25-48:
Connecting the GBE trunk interface
The system provides one trunk interface that is an electrical RJ-45 port.
RJ-45 Electrical Trunk Port
The pin assignment of RJ-45 connector on the trunk port is shown in the following figure and table.
Figure 10. Trunk Port RJ-45 pin assignment
Table 7. Ports 1-24 Pin Assignment
PIN
1 2 3 4 5 6 7 8 - 18 19 20 21 22 23 24 25
Port
Tip
1
Tip
2
Tip
3
Tip
4
Tip
5
Tip
6
Tip
7
Tip
8
- Tip
18
Tip
19
Tip
20
Tip
21
Tip
22
Tip
23
Tip
24
X
PIN
26 27 28 29 30 31 32 33 - 43 44 45 46 47 48 49 50
Port
Ring
1
Ring
2
Ring
3
Ring
4
Ring
5
Ring
6
Ring
7
Ring
8
- Ring
18
Ring
19
Ring
20
Ring
21
Ring
22
Ring
23
Ring
24
X
Table 8. Ports 25-48 Pin Assignment
PIN
1 2 3 4 5 6 7 8 - 18 19 20 21 22 23 24 25
Port
Tip
25
Tip
26
Tip
27
Tip
28
Tip
29
Tip
30
Tip
31
Tip
32
- Tip
42
Tip
43
Tip
44
Tip
45
Tip
46
Tip
47
Tip
48
X
PIN
26 27 28 29 30 31 32 33 - 43 44 45 46 47 48 49 50
Port
Ring
25
Ring
26
Ring
27
Ring
28
Ring
29
Ring
30
Ring
31
Ring
32
- Ring
42
Ring
43
Ring
44
Ring
45
Ring
46
Ring
47
Ring
48
X
LED A
LED B
Pin 8 Pin 1
1, 2 T/Rx+, T/Rx -
3, 6 T/Rx+, T/Rx -
4, 5 T/Rx+, T/Rx -
7, 8 T/Rx+, T/Rx -