Pinouts for the DB-9 Console Connector describes the pinouts for a DB-9 console plug connector.
| Function | Pin Number | Direction |
|---|---|---|
| DCD (data carrier detect) | 1 | In |
| RXD (receive data) | 2 | In |
| TXD (transmit data) | 3 | Out |
| DTR (data terminal ready) | 4 | Out |
| GND (ground) | 5 | - |
| DSR (data set ready) | 6 | In |
| RTS (request to send) | 7 | Out |
| CTS (clear to send) | 8 | In |
Null-Modem Cable Pinouts shows the pinouts for a 9-pin to 25-pin (RS-232) null-modem cable.
PC-AT Serial Null-modem Cable Pinouts shows the pinouts for a 9-pin to 9-pin (PC-AT) null-modem serial cable.
RJ45 Console Port on Switch shows the pinouts for the RJ45 console port on the Extreme Networks switches.
| Function | Pin Number | Direction |
|---|---|---|
| RTS (request to send) | 1 | Out |
| DTR (data carrier detect) | 2 | Out |
| TXD (transmit data) | 3 | Out |
| GND (ground) | 4 | — |
| GND (ground) | 5 | — |
| RXD (receive data) | 6 | In |
| DSR (data set ready) | 7 | In |
| CTS (clear to send) | 8 | In |
Pinouts for an RJ45 to DB-9 Adapter shows the pinouts for an RJ45-to-DB-9 adapter.
| Signal | RJ45 Pin | DB-9 Pin |
|---|---|---|
| CTS (clear to send) | 1 | 8 |
| DTR (data carrier detect) | 2 | 6 |
| TXD (transmit data) | 3 | 2 |
| GND (ground) | 4 | 5 |
| GND (ground) | 5 | 5 |
| RXD (receive data) | 6 | 3 |
| DSR (data set ready) | 7 | 4 |
| RTS (request to send) | 8 | 7 |