The icon of the speakerphone in Microsoft Lync 2010 is not generic. The icon resembles the icon of a product specific speakerphone, which may confuse users.
To resolve this problem, install the following cumulative update:
2467763 Description of the cumulative update package for Lync 2010: January 2011
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.