Hello Everyone,
I have asterisk installed on a raspberry pi and am using it as an intercom system. Essentialy there is a script on the raspberry pi that waits for a button to be pressed. When a button press has been detected the script executes an asterisk console dial to ring group on my companys FreePBX server, which in turn calls every phone in the building. All of that works great (even have a feature code that trips the door lock) but the biggest problem that I have right now is echo on the intercom side. I’ve googled my brains out today and the best I can come up with is that asterisk needs to ignore audio from its own speaker. I think using half duplex on the console would resolve this but I have no idea how to do this.
