RoIP: Mic Connector
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ICOM - HM-152 RJ 45 Wiring
Pin 1 = 8 volts Pin 2 = Frequency up/ down Pin 3 = AF output (headset audio) Pin 4 = PTT Pin 5 = Mic Ground (-) Pin 6 = Mic audio (+) Pin 7 = Ground Pin 8 = Squelch Switch
FLEX-3000/1500 Mic Connector Wiring
Pin 1 = VFO Up Pin 2 = VFO Down Pin 3 = +5 VDC Pin 4 = Mic Ground (-) Pin 5 = Mic audio (+) Pin 6 = PTT Pin 7 = Ground Pin 8 = Increase Step Tune
Motorola GM300 Wiring