PC Serial Port -9 Pin
(Diagram shows D9 male as on computer)
Pin number |
Description |
| 1 | DCD (data carrier detect) |
| 2 | RX (receive data) |
| 3 | TX (transmit data) |
| 4 | DTR (data terminal ready) |
| 5 | GND (signal ground) |
| 6 | DSR (data set ready) |
| 7 | RTS (request to send) |
| 8 | CTS (clear to send) |
| 9 | RI (ring indicator) |
