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Packet loss occurs when you connect a telephone that has Lync 2010 Phone Edition installed to a computer
Article ID: 2673305 - View products that this article applies to.
Consider the following scenario:
This issue occurs because the telephone device driver is handled incorrectly.
To resolve this issue, install the appropriate cumulative update for the telephone that you are using:
For HP 4110 and HP 4120 telephones
2672743For Polycom CX500, Polycom CX600, and Polycom CX3000 telephones
(http://support.microsoft.com/kb/2672743/ )Description of the cumulative update for Lync 2010 Phone Edition for HP 4110 and HP 4120: February 2012
(http://support.microsoft.com/kb/2672349 / )Description of the cumulative update for Lync 2010 Phone Edition for Polycom CX500, Polycom CX600, and Polycom CX3000: February 2012
For Aastra 6721ip and Aastra 6725ip telephones
(http://support.microsoft.com/kb/2672352/ )Description of the cumulative update for Lync 2010 Phone Edition for Aastra 6721ip and Aastra 6725ip: February 2012
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.