The main aim of telecommunications is to bring people thousands miles apart, anytime, anywhere together to communicate as if they were having a face-to-face conversation in a ubiquitous tele-presence way. One key component necessary to reach this main aim is the technology enabling usual communication by voice. This means the use of automatic speech recognition [1]. An IVR (Interactive Voice Response) based systems can be used to automate a wide range of services and data requests. These systems are used most often by the companies to provide the self-service abilities to customer. The system takes the input from the user and provides back the enterprise information in the form of recorded or synthesized voice, fax or even an email by connecting one or more online databases to the caller. Although there are several hundred million Internet-connected PCs in the world, this figure is dwarfed by the two billion fixed and mobile phones. The telephone is ubiquitous, increasingly mobile and could, in principle, provide a universal platform for accessing online services. To date efforts to harness this potential in the form of IVR systems have not proved especially popular with users. There's a wind of change blowing through the IVR world, impelled by advances in speech recognition technology and a transformation of the IVR programming environment.
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