Dce Cable Pinouts - 3Com 3C8S5007 - SuperStack II PathBuilder S500 Switch User Manual

98 A C: C
PPENDIX ONNECTORS AND
X.21 DCE Cable
Pinouts
C
ABLES
This cable connects the switch to an X.21 DTE.
Figure 36 Flex-WAN and X.21 DCE Connectors
To PathBuilder switch
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
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
60-pin Flex-WAN male connector
.
Table 23 X.21 DCE Cable Pinouts
Flex-WAN Connector
Signal Pin
CTS/RTS+ 1
CTS/RTS- 2
RTS/CTS+ 9
RTS/CTS- 10
TxD/RxD+ 11
TxD/RxD- 12
Circuit Ground 15
TxC/RxC- 23
TxC/RxC+ 24
RxD/TxD- 27
RxD/TxD+ 28
Shield Ground 46
Shorting Group 1 47
48
* Unused twisted wires of a twisted pair should be connected to Shield Ground. In this cable this
is one wire of twisted pair 4.
X.21 DCE Connector
Direction Pin Signal
1 Control+
2 Control-
5 Indicate+
12 Indicate-
4 Receive+
11 Receive-
- 8 Control GND
13 Timing-
6 Timing+
9 Transmit-
2 Transmit+
Cable Shield 1 Shield Ground
- - -
To DTE
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15
15-pin female connector
Twisted Pair
1
2
3
4
5
6
-
-
*