9. A method for providing Interactive Voice Response functionality within a multi-tiered telephony environment comprising the steps of: identifying an enterprise archive file stored on a tangible storage medium that contains an Interactive Voice Response (IVR) application; identifying hardware of a computing system comprising a tangible storage medium that is a computer-readable medium that stores computer program products having instructions executable by the hardware of the computing system, wherein said computer program products comprise a telephone server, a dialog server, a Voice server, and a Web server, wherein the telephone server, the dialog server, the voice server, and the Web server are each modular components of an application server, wherein the application server represent a functional telecommunication infrastructure for providing telecommunication and Web services, wherein the application server lacks IVR functionality; deploying the enterprise archive file within the application server, thus adding the application server responsive to the deploying to existing components of the application server; utilizing the deployed IVR application of the application server to provide IVR functionality to the application server, which results in the application server providing telecommunication, Web services, and IVR functionality by internally conveying information among modular components in accordance with application server protocols, said modular components comprising the telephone server, the dialog server, the Web server, and the IVR application.
12. The method of claim 9 , wherein the enterprise archive file contains a plurality of interpreters for different markup languages, and wherein the enterprise archive file contains a servlet, said utilizing step further comprising: for each of said SIP based telephony sessions, said servlet receiving an incoming session request; said servlet determining at least one of said plurality of interpreters for interpreting markup during a SIP based telephony session associated with the incoming session request; and utilizing the determined interpreter for the associated SIP based telephony session, wherein the application server internally provides IVR functionality through the IVR application without transferring communications outside the application server.