Article ID: 978717 - View products that this article applies to.
In the Quality of Experience (QoE) report, the send listening Mean Opinion Score (MOS) and the receive listening MOS are very low (<2.0). These scores remain low even though the sound quality of the Microsoft Office Communicator 2007 R2 call is good.
To fix this problem, apply the following update:
(http://support.microsoft.com/kb/976135/ )Description of the Communicator 2007 R2 cumulative update: January 2010