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M120 Fast Ethernet PIC 48-Port Cable Pinouts

 

The Fast Ethernet 48-port PIC has four VHDCI connector ports on its faceplate (see Figure 1), each of which accepts one of the four RJ-21 cables supplied with the PIC (see Figure 2). Each VHDCI connector port supports 12 Ethernet ports.

Figure 1: Fast Ethernet 48-port PIC
Fast Ethernet 48-port
PIC
Figure 2: VHDCI to RJ-21 Cable
VHDCI to RJ-21 Cable

Table 1 describes the RJ-21 cable pinouts.

Note

RJ-21 pin numbers 25 and 50 do not appear in the table because they are ground connectors.

Table 1: RJ-21 Pin Assignments

Ethernet Port Numbers

RJ-21 Pin Assignment

 TX -TX +RX -RX +

0, 12, 24, 36

2

27

1

26

1, 13, 25, 37

4

29

3

28

2, 14, 26, 38

6

31

5

30

3, 15, 27, 39

8

33

7

32

4, 16, 28, 40

10

35

9

34

5, 17, 29, 41

12

37

11

36

6, 18, 30, 42

14

39

13

38

7, 19, 31, 43

16

41

15

40

8, 20, 32, 44

18

43

17

42

9, 21, 33, 45

20

45

19

44

10, 22, 34, 46

22

47

21

46

11, 23, 35, 47

24

49

23

48