On a computer that is running Windows Vista, audio skips in Microsoft Office Communicator 2007 R2 during Communicator calls or during Public Switched Telephone Network (PSTN) calls.
To resolve this issue, apply the following update:
972884 Description of the update for Communicator 2007 R2: Oct 2009
To work around this issue, use one of the following methods.
Method 1 Disable the automatic start of Office Communicator 2007 R2 when Windows starts. Then, 60 seconds after Windows starts, manually start Office Communicator 2007 R2.
Method 2 60 seconds after Windows starts, close and then re-start Office Communicator 2007 R2.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
Note The default value in the Value data box is 60.
Note To complete the update to the
registry value, you must log on to the computer as the local administrator. Then, change the ownership of the
registry subkey to the local administrator's account. On the Owner tab of the Advance Security Settings for DelayedApps dialog box, make sure that the Replace owner on subcontainers and objects check box is selected before you apply the changes.