Upon hearing the break-in signal the interrupted station simply stops sending and transmits a single "K" prosign indicating for that the interrupting party may go ahead and then the interrupted party listens for the interrupting party to make their own transmission.
The interrupted station was hearing the break-in signal. The interrupted station simply stops sending. The interrupted station simply transmits a single "K" prosign indicating for that the interrupting party may go ahead. The interrupted party listens for the interrupting party. This is to make their own transmission.