Article ID: 981218 - View products that this article applies to.
A media time-out occurs on the Microsoft Office Communications Server 2007 R2, Mediation Server if no Real-Time Transport Protocol (RTP) packets or Real-Time Control Protocol (RTCP) packets are received for 30 seconds. When Office Communications Server 2007 R2, Mediation Server interacts directly with Cisco Call Manager (CCM) through Session Initiation Protocol (SIP), the following scenarios occur.
Note In these scenarios, no RTP packets or RTCP packets are received for a call.
To resolve this problem, install the following update:
977937After you apply this update, the Mediation Server is configured to ignore media time-outs when the server interacts with gateway peers that do not support RTCP.
(http://support.microsoft.com/kb/977937/ )Description of the cumulative update for Office Communications Server 2007 R2, Mediation Server: April 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
To make sure that the Mediation Server operates as expected together with gateway peers that do not support RTCP, this fix adds a new configuration file setting to the Mediation Server. This configuration file setting is called GatewayIgnoreMediaTimeout. This setting contains one of two values: True or False. The configuration file is the MediationServerSvc.exe.config file. You should put this file into the directory in which the Mediation Server is installed. To find this directory, search for the Microsoft.RTC.MediationServerCore.dll file.
Note By default, the Mediation Server is installed in the following location on drive C:
C:\Program Files\Microsoft Office Communications Server 2007\Mediation ServerIf this file is set to ignore media time-outs for the gateway side of the Mediation Server, its contents are displayed as follows.
If the file does not exist, the default value for GatewayIgnoreMediaTimeout is set to False. If the Mediation Server is set to ignore media time-outs for its gateway side, it will automatically enable session timers for its interactions with its gateway side peer. If the session timers expire, the call is automatically cleared. If the Mediation Server has to ignore media timeouts for its gateway-side interactions, but the session timers do not have to be enabled, a configuration file setting is used. This configuration file setting is called GatewaySessionTimer. This setting contains one of two values: True or False. A False value disables session timers for gateway side interactions.