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

Article ID: 2861321 - View products that this article applies to.
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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: July 12, 2013 - Revision: 1.0
Applies to
  • Microsoft Lync Server 2010 Standard Edition
  • Microsoft Lync Server 2010 Enterprise Edition
  • Microsoft Unified Communications Managed API v3.0 Core Runtime
kbqfe kbfix kberrmsg kbsurveynew kbexpertisebeginner KB2861321

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