Article ID: 981250 - Last Review: October 6, 2011 - Revision: 3.0

The Office Communications Server 2007 R2, Mediation Server does not send a response to the PSTN gateway when the Mediation Server cannot contact the front-end server

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SYMPTOMS

On a computer that is running Microsoft Office Communications Server 2007 R2 and that has the Mediation Server server role installed, a Mediation Server does not send a response to the Public Switched Telephone Network (PSTN) gateway when the Mediation Server cannot contact the front-end server.
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RESOLUTION

To fix this problem, install the following update:
977937  (http://support.microsoft.com/kb/977937/ ) Description of the cumulative update for Office Communications Server 2007 R2, Mediation Server: April 2010
Note After you apply this update, the Mediation Server will send a 503 final response to the PSTN gateway when it cannot contact the front-end server.
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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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APPLIES TO
  • Microsoft Office Communications Server 2007 R2 Enterprise Edition
  • Microsoft Office Communications Server 2007 R2 Standard Edition
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Keywords: 
kbqfe kbexpertiseinter kbsurveynew kbprb KB981250
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