Like the Elan, The Omni is just listening for the access DTMF tones to start the function or menu. So when the phone rings, the music will mute. You can also just pick up the phone ( your in the elan system now) and hit #6 and mute the music system too. Everything will work. The incomming phone line routes to the Omni first, then the Elan 600 and then to the distribution panel for the phones.