Serial Connectors and Flex-WAN Cables 177

RS-232 DTE Cable This cable connects the bridge/router to an RS-232 DCE.

Pinouts

Figure 31 Flex-WAN and RS-232 DTE Connectors

To SuperStack II NETBuilder

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

 

 

 

 

To DCE

 

 

 

 

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

1

2

3

4

5

6

7

8

9

10

11 12

13

31

32

33

34

35 36

37

38 39

40

41

42

43

44

45

 

 

 

 

 

 

 

 

 

 

 

 

 

60

59

58

57

56

55

54

53

52

51

50

49

48

47

46

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14

15

16

17 18

19

20

21

22 23

24

25

60-pin Flex-WAN male connector

25-pin male connector

.

Table 25 RS-232 DTE Cable Pinouts

Flex-WAN Connector

 

RS-232 DTE Connector

 

Signal

Pin

Direction

Pin

Signal

Twisted Pair*

DCD/LL

33

8

DCD

1

 

 

 

 

 

 

DSR/DTR

34

6

DSR

2

 

 

 

 

 

 

CTS/RTS

35

5

CTS

3

 

 

 

 

 

 

RxD/TxD

36

3

RxD

4

 

 

 

 

 

 

TxC/Nil

37

15

TxC

5

 

 

 

 

 

 

RxC/TxCE

38

17

RxC

6

 

 

 

 

 

 

TxCE/TxC

39

24

TxCE

7

 

 

 

 

 

 

TxD/RxD

41

2

TxD

8

 

 

 

 

 

 

RTS/CTS

42

4

RTS

9

 

 

 

 

 

 

DTR/DSR

43

20

DTR

10

 

 

 

 

 

 

LL/DCD

44

18

LTST

11

 

 

 

 

 

 

Circuit Ground

45

-

7

Circuit Ground

12

 

 

 

 

 

 

Shield Ground

46

Cable Shield

1

Shield Ground

-

 

 

 

 

 

 

Shorting Group 1

50

-

-

-

-

 

51

 

 

 

 

 

52

 

 

 

 

 

 

 

 

 

 

*Unused twisted wires of a twisted pair should be connected to Shield Ground. In this cable this is one wire of each of the twisted pairs 1 to 12.

Page 177
Image 177
3Com NETBuilder SI, SuperStack II manual RS-232 DTE Cable Pinouts