GotSpeech.NET

the DetectAnsweringMachineActivity in my Outbound Call project always gets expection "Microsoft.SpeechServer.SpeechApplicationException: The recognizer failed to start before the InitialSilenceTimer expired."

The Outbound Call speech server is connected to FreeSwitch. If I capture this exception and then let the workflow go to next step playing message,  It work fine.

 Anyone know what cause this issue?

 TIA 

You probably have a large or complex grammar that is taking the recognizer a long time to compile and thus start recognition. This time is currently longer than the initialSilence timeout set on the prompt preceeding the grammar.

It sounds like you're only playing a prompt, if that's the case why start recognition at all?

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Thank Ahmed. 

I loaded the grammar before DetectAnswerMachineActivity.  And the grammar is small and simple.

This is outbound call app, I need to detect whether or not it is answer machine before leaving message. 

 Another interesting thing is that if I set initialSilence timeout to 3, the exception is fired after 3 second, if 10 seconds, it is filed after 10 second. 

 

Look at the trace logs and see if you can find which operation on the recognizer is holding things up. That'll help you narrow things down.

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Use of included script samples are subject to the terms specified at
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Thank Ahmed,

It is in DetectAnswerMachineActivity. I replaced it with QA. It has the same issue.

Since you said it may be the issue that Speech Server take to long time to load the gammar.  I created the same grammar dymamically in the code. it works fine.  So it is really the grammar loading issue.

The following was in the Code control before DetectAnswerMachineActivity

         detectAnswerMachine.Grammar = new Grammar(new Uri("file://" + Path.Combine(Path.GetDirectoryName  ApplicationHost.LocalPath.LocalPath),
                                                "Grammars/OutboundEnglish.grxml")), "Detect");

 Right now I replaced it with the following and it work fine.

         detectAnswerMachine.Grammar = new Grammar(
                new Microsoft.SpeechServer.Recognition.SrgsGrammar.SrgsDocument(
                    new Microsoft.SpeechServer.Recognition.SrgsGrammar.SrgsRule("Detect",
                        new Microsoft.SpeechServer.Recognition.SrgsGrammar.SrgsSemanticInterpretationTag("$.DetectedEntity = \"ANSWERING_MACHINE_RESPONSE\""),
                        new Microsoft.SpeechServer.Recognition.SrgsGrammar.SrgsItem(
                            new Microsoft.SpeechServer.Recognition.SrgsGrammar.SrgsOneOf(
                                new Microsoft.SpeechServer.Recognition.SrgsGrammar.SrgsItem("Hello"),

                   ......

 

 

 

I found the grammar has one structure error. 

         Structure issue on 'Detect' WILDCARD element:  Improper use of WILDCARD element.  Wildcard should be contained within an element that is both optional and has no semantic tag. 

I removed the following from my outbound call grammar, then it works.

     <item>
         <item>This is</item>
         <ruleref special="GARBAGE"/>
         <item>speaking</item>
     </item>