DB9 connector (port 1)
This is a 9-pin DTE 9-wire modem DB9 connector.
|
Pin |
Usage |
|---|---|
|
1 |
DCD |
|
2 |
RS-232 serial data in (Rx) |
|
3 |
RS-232 serial data out (Tx) |
|
4 |
DTR |
|
5 |
GND |
|
6 |
DSR |
|
7 |
RTS |
|
8 |
CTS |
|
9 |
RI |