Thanks, that'l work when there are people in both places.
I want to be able to listen to what's going on in the barn all the time, from the house.
Then if the house wants to call the barn we can 'push to talk' and the guy in the barn will hear. When PTT is released the barn again goes on trnasmit.
The Barn speaker/reciever has to be Audio operated. So all I have to do is yell at the speaker.