Chat Buzzer by DeskMoz is a free application for desktops. It can run as a browser addon and generate the chat alert sound when the LiveChatInc/ Zopim chat(s) are not answered for the time you set.

It can be useful for LiveChat operators, especially for those who work in an instant messaging environment. It will alert them that a chat is unanswered and they can click on the notification to go and talk to the user.

It works as follows:

Once installed, it will automatically run every time a user starts a LiveChat on the website.

If the user has not set a notification time, it will default to one minute.