Speaker Socket
1 Cradle
2 Ground
3
4 Speaker
5

Handset (Microphone) Socket
1 Cradle
2 Power Ground
3 Mike Ground
4 Speaker
5 Mike Active
6 RX Audio out
7 PTT
8 Not used

Pinouts are as viewed from rear of plug.



More info to come.....

Check out my AFI900 software for the FM900 radios.

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Copyright David Griffiths VK2AFI 1999-2000