I recently got two TRW-V4B-V(S/N: 0701TRVM10M) I would like to voice transmission between "TRW-V4 VOICE Transceiver Module". Now I was connected to the module and MIC / SPEAKER. But no voice transmission. Why? What I did wrong? What should I do to change the settings? There is no way to set the Module in the data sheet of the TRW-V4B-V.
You need to get connection with the two control pins according to manual firstly. When A calling B, it will tigger the call button of A, and then tigger the call button of B to get connection. I was looking at your website and are very interested on the Transceiver Module For Voice model: TRW-V4B-V How many channels does it have?
TRW-V4B-V, it can? amplify the module output also provide one channel.

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