30
Rapier Series Switch
C613-03020-00 REV K
Figure 21: Pin wiring diagram for a DCE RS-232 Terminal Port (DB9 female connector) male
to male modem cable
The switch’s RS-232 Terminal Port has a DCE female socket. This allows the use
of a straight-through cable when connecting the switch to a terminal or PC.
Output from the SHOW ASYN command will, however, still have a DTE
perspective. The internal DTE pin roles are listed in
Table 10
.
Table 10: Internal DTE pin roles
Pin
Role
2
TXD
3
RXD
4
CD
5
GND
6
DTR
7
CTS
8
RTS
Notes:
(1)
→
Output from switch;
←
Input to switch
(2)
Cable version 1.0.
DB9MDB9Fsw
3 (TXD)
2 (RXD)
1 (DCD)
5 (GND)
4 (DTR)
8 (CTS)
7 (RTS)
9
6
Not connected
1
2
3
4
5
6
7
8
9
Cable
Pin 9
Pin 6
Pin 5
Pin 1
DB9 Male Pin View
Pin 6
Pin 9
Pin 1
Pin 5
DB9 Male Pin View
DB9 Male
(to switch/DCE)
DB9 Male
(to modem/DCE)
Not connected
→ (
TXD)
← (
RXD)
← (
CD)
(GND)
→
(DTR)
←
(CTS)
→
(RTS)
(RING)
