3Com 3C8S5007 - SuperStack II PathBuilder S500..., User Manual

Page: 94 / 190

94 A
PPENDIX
C: C
ONNECTORS AND
C
ABLES
RS-232 DCE Cable
Pinouts
This cable connects the switch to an RS-232 DTE.
Figure 32 Flex-WAN and RS-232 DCE Connectors
.
Table 19 RS-232 DCE Cable Pinouts
Flex-WAN Connector
RS-232 DCE
Connector
Signal Pin Direction Pin Signal Twisted Pair *
* 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.
DCD/LL 33
←
18 LTST 1
DSR/DTR 34
←
20 DTR 2
CTS/RTS 35
←
4 RTS 3
RxD/TxD 36
←
2 TxD 4
RxC/TxCE 38
←
24 TxCE 5
TxCE/TxC 39
→
15 TxC 6
Nil/RxC 40
→
17 RxC 7
TxD/RxD 41
→
3 RxD 8
RTS/CTS 42
→
5 CTS 9
DTR/DSR 43
→
6 DSR 10
LL/DCD 44
→
8 DCD 11
Circuit Ground 45 - 7 Circuit Ground 12
Shield Ground 46 Cable Shield 1 Shield Ground -
Shorting Group 1 50
51
- - - -
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
60-pin Flex-WAN male connector
25-pin female connector
To PathBuilder switch
To DTE
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