The Doorbell feature only works in Adobe Connect version 8.0.
One of the challenges faculty face when they offer virtual office hours is having to stare at the Adobe Connect meeting room in anticipation of students entering the virtual meeting room. On Adobe's Connect website, multiple custom meeting pods are offered to enhance the rooms. One of these enhanced meeting pods is the Doorbell Connect pod. This pod enables meeting participants to ring a bell when they need service or when they have entered a meeting room.
As Host you will need to download the file (doorbell.swf) to your computer before you can install it in your room. Once completed, you can setup the file inside each of your meeting rooms.