(This functionality is available with the Input / Output module)
The default communications settings are designed to work effectively if the Geodat-400 is set up as follows.
| DISPLAY | SETTING |
| 1 : Baud | 9600 |
| 2 : Parity | 0 |
| 3 : Char. len | 8 |
| 4 : Stop bits | 1 |
| 5 : Time out | 10 |
| 6 : Hardw. Hs | 0 |
| 7 : Softw. Hs | 1 |
| 8 : XON | 17 |
| 9 : XOFF | 19 |
| 10 : NAK | 0 |
| 11 : ACK | 0 |
| 12 : ENQ | 0 |
| 13 : STX | 0 |
| 14 : ETX | 2.1310 |
| 15 : Nuls | 0 |
| 16 : EOT | 3.041310 |