| Pin | Name | Direction | Color | Description |
| 1 | Power (+ 9V) | | | Power (+ 9V) |
| 2 | Battery charge | | | Battery charge |
| 3 | Handsfree sos | | | Handsfree sos |
| 4 | Handsfree extern (10K resistor | | | Handsfree extern (10K resistor to +9 to enable handsfree functions) |
| 5 | TXE | | | TXE |
| 6 | RXE | | | RXE |
| 7 | Ignition (10K resistor to +9 t | | | Ignition (10K resistor to +9 to illuminate the display continiously) |
| 8 | Antenna extern (10K resistor t | | | Antenna extern (10K resistor to ground to enable external microphone and antenna) |
| 9 | Audio 1 | | | Audio 1 |
| 10 | Audio 2 (loudspeaker amplifier | | | Audio 2 (loudspeaker amplifier output) |
| 11 | Microphone (use electrect micr | | | Microphone (use electrect microfoon and 46 db preamp.) |
| 12 | Audio ground (do not connect t | | | Audio ground (do not connect to 13 and 14 ) |
| 13 | Ground (supply) | | | Ground (supply) |
| 14 | Ground (supply) | | | Ground (supply) |
