DB-9 Pinout
|
DB-9M |
Function |
Abbreviation |
|
1 |
Data Carrier Detect |
CD |
|
2 |
Receive Data |
RD or RX or RXD |
|
3 |
Transmitted Data |
TD or TX or TXD |
|
4 |
Data Terminal Ready |
DTR |
|
5 |
Signal Ground |
GND |
|
6 |
Data Set Ready |
DSR |
|
7 |
Request To Send |
RTS |
|
8 |
Clear To Send |
CTS |
|
9 |
Ring Indicator |
RI |
