| 25 | 9 | |||
| Pin | Pin | Signal | ||
| DTE | DTE | Abrev. Signal Name | Direction | |
| 2 | 3 | TXD | Transmitted Data | (output) |
| 3 | 2 | RXD | Received Data | (input) |
| 4 | 7 | RTS | Request to Send | (output) |
| 5 | 8 | CTS | Clear to Send | (input) |
| 6 | 6 | DSR | Data Set Ready | (input) |
| 7 | 5 | Gnd | Signal Ground | |
| 8 | 1 | DCD | Data Carrier Detect | (input) |
| 20 | 4 | DTR | Data Terminal Ready | (output) |
| 22 | 9 | RI | Ring Indicator | (input) |
