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"488 Not Acceptable Here" error message when a client accepts or forwards a call in a Lync Server 2010 environment

Assume that you have a client in a Microsoft Lync Server 2010 environment. The client accepts a call by using a third-party voice mail device or forwards a call to a third-party voice mail device. In this situation, you receive the following error message from Lync Server 2010 Mediation Server:
488 Not Acceptable Here

Note This error message indicates that media negotiation on the gateway side of third-party voice mail system failed because a Session Description Protocol (SDP) response contained a bandwidth field that the SDP did not expect.
This issue occurs because the SDP cannot handle multiple bandwidth values.
To resolve this issue, install the following cumulative update:
2847888 Description of the cumulative update for Lync Server 2010, Unified Communications Managed API 3.0 Runtime: July 2013

Article ID: 2861321 - Last Review: 07/12/2013 22:22:00 - Revision: 1.0

Microsoft Lync Server 2010 Standard Edition, Microsoft Lync Server 2010 Enterprise Edition, Microsoft Unified Communications Managed API v3.0 Core Runtime

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