16
3.2.4.
DB9 Connector (COM port)
DB9 connector is designed to connect COM port via RS232 interface. For description of connector pins,
see Table 3.5.
9
6
5
1
Figure 8.
DB9 connector
Table 8.
DB9 Connector Pin Assignment
Pin
Signal
Direction
Purpose
1
RS232 - DCD
Device
Router
Data carrier detect
2
RS232 - RXD
Device
Router
Receive data
3
RS232 - TXD
Router
Device
Transmit data
4
RS232 - DTR
Router
Device
Data terminal ready
5
GND
Ground
Router case
6
RS232 - DSR
Device
Router
Data set ready
7
RS232 - RTS
Router
Device
Request to send
8
RS232 - CTS
Device
Router
Clear to send
9
RS232 - RI
Device
Router
Ring indicator
3.2.5.
Reset Button
The reset button is designed to restore the router's factory settings in case it can not be accessed.
CAUTION!
Connect devices to the router serial port only when both devices are off.
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