From Teltonika Networks Wiki
| RS232 connector pinout |
filler text |
| Pin |
Name |
Description |
 |
| 1 |
D_N |
Driver negative signal |
| 2 |
R_N |
Receiver negative signal |
| 3 |
GND |
Device ground |
| 4 |
D_P |
Driver positive signal |
| 5 |
R_P |
Receiver positive signal |
| 6 |
Vin |
Power input 9-30 VDC |