RNS 315
12-Pin Connector 3 for Telephone and Microphone Signals
1 Microphone input, negative
2 Not assigned
3 Not assigned
4 Not assigned
5 Left telephone audio input signal, negative
6 Right telephone audio input signal, negative
7 Microphone input, positive
8 Not assigned
9 Not assigned
10 Telephone mute (radio mute)
11 Left telephone audio input signal, positive
12 Right telephone audio input signal, positive