X.21 DCE Cable
This cable connects the bridge/router to an X.21 DTE.
Pinouts
Figure 25 Flex-WAN and X.21 DCE Connectors
60-pin Flex-WAN male connector
.
Table 17 X.21 DCE Cable Pinouts
* Unused twisted wires of a twisted pair should be connected to Shield Ground. In this cable this
To SuperStack II NETBuilder
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
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
is one wire of twisted pair 4.
Serial Connectors and Flex-WAN Cables
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
-
-
53
*