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
2TXD
3RXD
4CD
5GND
6DTR
7CTS
8RTS
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)
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