Device signal | D-Sub9 plug | Device or modem signal | D-Sub9 plug |
---|---|---|---|
TxD | 3 | RxD | 2 |
RxD | 2 | TxD | 3 |
RTS | 7 | CTS | 8 |
CTS | 8 | RTS | 7 |
DTR | 4 | DCD | 1 |
DCD | 1 | DTR | 4 |
GND | 5 | GND | 5 |
Operating a modem over the serial interface |
Device signal | D-Sub9 plug | Device or modem signal | D-Sub9 plug |
---|---|---|---|
TxD | 3 | RxD | 2 |
RxD | 2 | TxD | 3 |
RTS | 7 | CTS | 8 |
CTS | 8 | RTS | 7 |
DTR | 4 | DCD | 1 |
DCD | 1 | DTR | 4 |
GND | 5 | GND | 5 |