Web Telephony Engine

Purpose

The Microsoft® Web Telephony Engine (WTE) is a service that can be installed and run on Windows® 2000 systems. This service lets you use Web-development tools such as HTML, Microsoft ActiveX® controls, scripting languages, and Active Server Pages (ASP) to create Web pages accessible by telephone and Internet browser and to build HTML-based interactive voice response (IVR) applications.

Where Applicable

WTE lets you create IVR applications for businesses and consumers. The ability to provide graphical and telephony user interfaces from a single source makes your application more accessible to end users. On the server side, the single code base means easier maintenance on the installed application.

Audience

Software developers can use the various COM interfaces that WTE exposes, along with standard HTML coding, to create, configure, and maintain IVR applications that run on a variety of hardware and software configurations. Vendors of development tools can use the same set of interfaces to provide monitoring and analysis tools for development and administration applications. Finally, systems administrators can access the interfaces to customize Web telephony applications, and to collect and log user data.

To develop Web telephony applications, you should be familiar with interactive telephony application design, HTML, and COM object programming (in any supporting language). In addition, an understanding of client- and server-side scripting, the Microsoft Speech API (SAPI), the Telephony Application Programming Interface (TAPI) 3.0 Call object, and the Microsoft Internet Explorer Object Model are recommended.

Hardware and Software Requirements

In addition to Windows® 2000 and WTE, which is distributed with the Platform SDK, you will need an IP device, or a TAPI 2.1-compliant voice board or voice modem. If your voice board or modem driver is not integral to Windows® 2000, you will also need to install the appropriate telephony service provider (TSP).

Your application can use any TTS or SR engines that support Microsoft SAPI 4.0a technology. Narrator, the Microsoft TTS engine, is part of the Windows® 2000 operating system. You can also download, at no charge, Microsoft's SAPI 4.0a speech-recognition engine from http://www.microsoft.com/IIT.

See Also

Microsoft Telephony Overview,

Internet Information Services SDK,

Component Object Model

ActiveX Controls

Overview

General information about Web Telephony Engine.

Reference

Documentation of Web Telephony Engine.

Feedback

Make error reports and feature requests directly to Microsoft.