 25 pin D-SUB male connector to the computer1 | Name
| Pin
| Pin
| Name |
Protective Ground | 1 | 1 | Protective Ground |
Transmit Data | 2 | 3 | Receive Data |
Receive Data | 3 | 2 | Transmit Data |
Request to Send | 4 | 5 | Clear to Send |
Clear to Send | 5 | 4 | Request to Send |
Data Set Ready | 6 | 20 | Data Terminal Ready |
Signal Ground | 7 | 7 | Signal Ground |
Data Terminal Ready | 20 | 6 | Data Set Ready |
|  25 pin D-SUB male connector to the computer2 |