X.21 DCE Cable Pinout

15

1

–

Shield Ground

1

2

2

Transmit Data (A)

37

3

38

Control (A)

60

4

59

Receive (A)

48

5

47

Indicate (A)

52

6

51

Signal Element Timing (A)

57

8

–

Signal Ground

2

9

1

Transmit Data (B)

38

10

37

Control (B)

59

11

60

Receive (B)

47

12

48

Indicate (B)

51

13

52

Signal Element Timing (B)

30 to 29

–

–

–