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Дата изменения: Wed Oct 6 21:55:50 2004
Дата индексирования: Sat Apr 9 23:16:56 2016
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Standard USOC Harmonica

USOC Harmonica and Patch Panel Wiring

Each harmonica consists of eight 6-wire 6-position RJ11 jacks connected to one 50-pin male Telco connector. Note that a patch panel simply consists of a set of harmonicas mounted in one panel. USOC is a common way of wiring the RJ11 jacks to the Telco connector, and it is the standard we use at APO. Always buy USOC harmonicas and patch panels for RS-232 distribution!

RJ11 Pin

Signal

Male Telco Connector Pin

Jack #1

Jack #2

Jack #3

Jack #4

Jack #5

Jack #6

Jack #7

Jack #8

1

Tx Flow

28

31

34

37

40

43

46

49

2

Tx

27

30

33

36

39

42

45

48

3

Tx Gnd

1

4

7

10

13

16

19

22

4

Rx Gnd

26

29

32

35

38

41

44

47

5

Rx

2

5

8

11

14

17

20

23

6

Rx Flow

3

6

9

12

15

18

21

24

Note that Telco pins 25 and 50 are not connected

 

RJ11 Pin Numbers