Specifications

20 AT-8600 Series
C613-03080-00 REV G
The following figure shows the 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 so that you can use
a straight-through cable when connecting the switch to a terminal or PC.
However, output from the show asyn command still has a DTE perspective.
The internal DTE pin roles are listed in the following table.
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)