I guess you must be talking about music in your room when UV connects. Anyways, There is a speaker icon in the app-bar of your meeting room. You can go and mute your meeting client by clicking on the speaker icon. Do let me know if it doesn't solve your problem.
Thanks, but if I click on the speaker icon, I won't be able to hear the other person in the room?
You can go into your Audio Preferences and disable the UV bridge. There is also the option in the drop down menu next to the speaker icon that allows you to mute just the telephone audio. This would make it so just the VoIP audio is heard, but I believe the telephone audio is still recorded.
This sounds like you either need to disconnect the phone from your room or call into the phone bridge as a host/leader. Ultimately this is a function of your phone bridge, not Connect.