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    | • | 
    Bob
    says, “activate IETM” in order to switch 
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    grammars
    to the IETM grammar. 
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    – | 
    speech.interpreter.GlobalInterpreter.interpret() 
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    – | 
    speech.grammar.CentralGrammarHandler. 
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       setActiveGrammarHandler(IETMGrammarHandler) 
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    | • | 
    Bob
    says, “next step” and the speech system speaks 
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    the 1st
    step to him. 
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    – | 
    speech.CentralInterpreter.ActiveInterpreter. 
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    interpret() 
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    – | 
    speech.IETMInterpreter.interpret() 
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    – | 
    speech.Synthesis.speakStep() 
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