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

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Symptoms

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.

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Cause

This issue occurs because the SDP cannot handle multiple bandwidth values.

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Resolution

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

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Keywords: kbqfe, kbfix, kberrmsg, kbsurveynew, kbexpertisebeginner, kb

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Article Info
Article ID : 2861321
Revision : 1
Created on : 1/7/2017
Published on : 7/12/2013
Exists online : False
Views : 286