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Speech encoding in a client Server System Such as a laptop, personal data assistant or mobile phone communicating with an interactive voice response telephony application. A method of communication with a speech enabled remote telephony device Such as a mobile phone is described comprising the following StepS. Receiving user Speech input into the mobile phone as part of a dialogue with an inter active voice response telephony application. Performing Speech recognition to convert the Speech into text and converting the text into tones such as DTMF tones. Trans mitting the DTMF tones over the voice channel to an interactive voice response (IVR) telephony application an allowed response feature converts the users response to a known valid response of the IVR application. A language conversion feature allows a perSon in one language to Speak in that language to an IVR application operating in a …