Has anyone else noticed on a DX120, when you call into the system and are talking on the phone to someone who shows extention appearance with someone on DND (extention buttons flashing), You can hear noise on the caller end that corresponds with the DND lights flashing. You can't hear it at the Edge 120, just on the caller end. Also when the Edge 120 is put on mute, the noise goes away. This is happening on the only two 120s I've checked, maybe more/all? Any thoughts? :bang: