Users have the option to enable or disable audio alerts. Accounts are set to disable this feature by default.
To Enable:
1) Select the Instant Messaging icon at the top of the page.
2) An IM window will then pop-up. From the IM window click on the Options button located under the text box.
3) The options screen will appear. To enable audio alerts, check the box and click SAVE.
4) You will then be redirected back to the IM conversation screen.