Article ID: 948734 - View products that this article applies to.
When you start an audio call from Microsoft Office Communicator 2007 on a client computer that is running Windows 2000 with Service Pack 4, the audio volume may fade during the call.
To resolve this problem, apply the update that is described in Microsoft Knowledge Base article 946164. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/946164/ )Description of the update for Communicator 2007: April 2, 2008
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.