Hello mate, In a TRRS audio jack, the tip carries the microphone signal, the first ring carries the headphone signal, the second ring carries the push-to-transmit signal and finally the sleeve is still used for the ground.
The wires in a four conductor wire are correspondingly color coded. The white wire comes from the microphone and should be soldered to terminal 1. The blue wire comes from the headphones and must connect to terminal 2. The red wire comes from the push-to-transmit button and must connect to terminal 3. Finally the black wire functions as the ground and connects to terminal 4.
Hope this helps.
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