Question: Can I wire 2 radios to a TW-47. One to permanently transmit (TX) and the other to receive (RX) when someone talks on the RF channel?
The customer requested to have full-duplex wireless communications. In detail he would like to permanently transmit from a mainstation (CS-702, MS-702, MS-704) to the radio on one RF channel and receive back from another radio to the mainstation on another RF channel.
Solution: There is a need to use 2x TW-47, one for receive and a separate one for transmit, because of the facts that the call signal is needed to trigger the relay for transmission (PTT) and the audio from the TW-47 (pin 1/6) to the mainstation becomes muted when the call button is pressed.
The TW-47 for transmit - used to  permanently transmit audio to the radio - will be using factory settings. The mainstation is set to auto call mode (call on talk) on the connected partyline channel.* Take special care to choose the right type of radio because not all radios are built to transmit permanently.
The TW-47 for receive must be set to “TW” mode (using the internal switch) in order to ignore the Clear-Com call signal. This way the audio will be routed to the mainstation even when the talk button (and therfore call button) is pressed.