Specifications

Hardware Reference 29
C613-03086-00 REV A
RS-232 Terminal Ports (ASYN)
Asynchronous interfaces (labelled ASYN0, ASYN1, RS-232 or CONSOLE) use
DB9 female connectors, DB9 male connectors, or RJ-45 connectors, depending
on the model (Table 1-7). Pinouts match those used for most building wiring
schemes (Table 1-8, Table 1-9, and Table 1-10 on page -30).
Table 1-7: Asynchronous interface connectors by model.
Router Model/Option Connector Wiring Pinouts
AT-AR410
AT-AR410S
DB9 female DCE Table 1-8 on page -29
AT-AR440S
AT-AR441S
AT-AR450S
DB9 male
DTE
for use with
asynchronous
modems
Table 1-9 on page -29
AT-AR024 ASYN4 PIC RJ-45 - Table 1-10 on page -30
Table 1-8: Pinout of the DB9 female connectors on asynchronous interfaces (pins are
numbered from right to left to right).
Pin Function Signal Direction
1 Not connected
2 TXD Output from router
3 RXD Input to router
4 DCD Input to router
5GND
6 DTR Output from router
7 CTS Input to router
8 RTS Output from router
9 RING Input to router (only available on expansion card interfaces)
Table 1-9: Pinout of the DB9 male connectors on asynchronous interfaces (pins are
numbered from left to right).
Pin Function Signal Direction
1 DCD Input to router
2 RXD Input to router
3 TXD Output from router
4 DTR Output from router
5GND
6 Not connected
7 RTS Output from router
8 CTS Input to router
9 Not connected