Symptoms
Consider the following scenario:
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You sign in to a Microsoft Lync 2010 client on a computer that is connected to an Aries telephone.
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The telephone is running Lync Phone Edition, and is paired with the Lync 2010 client.
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A USB headset is connected to the computer, and you set device preference to the USB headset.
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You accept an incoming Public Switched Telephone Network (PSTN) call in the client as a delegate, and then you try to answer the call by using the USB headset.
In this scenario, the call is routed to the Aries telephone in speaker mode.
Cause
This issue occurs because the Lync 2010 client incorrectly treats the telephone as a preferred device.
Resolution
To resolve this issue, install the following cumulative update:
2884632 Description of the cumulative update package for Lync 2010: October 2013
More Information
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
