RJ-21 Cable Pinouts

Table B-1 lists the RJ-21 cable pinouts on the Catalyst 2950ST-24 LRE and Catalyst 2950ST-24 LRE 997 switches.

Table B-1 - Catalyst 2950ST-24 LRE and Catalyst 2950ST-24 LRE 997 Switch RJ-21 Cable Pinouts

Function  Pin  Pin  Function 

Port 1 Tip

1

26

Port 1 Ring

Port 2 Tip

2

27

Port 2 Ring

Port 3 Tip

3

28

Port 3 Ring

Port 4 Tip

4

29

Port 4 Ring

Port 5 Tip

5

30

Port 5 Ring

Port 6 Tip

6

31

Port 6 Ring

Port 7 Tip

7

32

Port 7 Ring

Port 8 Tip

8

33

Port 8 Ring

Port 9 Tip

9

34

Port 9 Ring

Port 10 Tip

10

35

Port 10 Ring

Port 11 Tip

11

36

Port 11 Ring

Port 12 Tip

12

37

Port 12 Ring

Port 13 Tip

13

38

Port 13 Ring

Port 14 Tip

14

39

Port 14 Ring

Port 15 Tip

15

40

Port 15 Ring

Port 16 Tip

16

41

Port 16 Ring

Port 17 Tip

17

42

Port 17 Ring

Port 18 Tip

18

43

Port 18 Ring

Port 19 Tip

19

44

Port 19 Ring

Port 20 Tip

20

45

Port 20 Ring

Port 21 Tip

21

46

Port 21 Ring

Port 22 Tip

22

47

Port 22 Ring

Port 23 Tip

23

48

Port 23 Ring

Port 24 Tip

24

49

Port 24 Ring

No connect

25

50

No connect


Table B-2 lists the RJ-21 cable pinouts on the Catalyst 2950ST-8 LRE switches.

Table B-2 - Catalyst 2950ST-8 LRE Switch RJ-21 Cable Pinouts

Function  Pin  Pin  Function 

Port 1 Tip

1

26

Port 1 Ring

Port 2 Tip

2

27

Port 2 Ring

Port 3 Tip

3

28

Port 3 Ring

Port 4 Tip

4

29

Port 4 Ring

Port 5 Tip

5

30

Port 5 Ring

Port 6 Tip

6

31

Port 6 Ring

Port 7 Tip

7

32

Port 7 Ring

Port 8 Tip

8

33

Port 8 Ring

No connect

9

34

No connect

No connect

10

35

No connect

No connect

11

36

No connect

No connect

12

37

No connect

No connect

13

38

No connect

No connect

14

39

No connect

No connect

15

40

No connect

No connect

16

41

No connect

No connect

17

42

No connect

No connect

18

43

No connect

No connect

19

44

No connect

No connect

20

45

No connect

No connect

21

46

No connect

No connect

22

47

No connect

No connect

23

48

No connect

No connect

24

49

No connect

No connect

25

50

No connect