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You have a VoiceXML application that uses Dual Tone Multiple Frequency (DTMF) grammar recognizer. You set the interdigittimeout property of the DTMF grammar recognizer to a certain time span, and then you deploy the application on Microsoft Office Communications Server 2007 Speech Server. You call the VoiceXML application, and then you start clicking the DTMF buttons when you are prompted. When you do this, the time-out between two consecutive digits differs from the time span that you set in the VoiceXML application.
To resolve this problem, install the Communications Server 2007 Speech Server update package that is dated April 2009. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
963025 Description of the update for Communications Server 2007 Speech Server: April 2009
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.