Microsoft KB Archive/321189

= PRB: Limitations of Web Telephony Engine 1.0 =

PSS ID Number: 321189

Article Last Modified on 5/12/2003

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The information in this article applies to:


 * Microsoft Win32 Application Programming Interface (API), when used with:
 * the operating system: Microsoft Windows 2000

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This article was previously published under Q321189



SYMPTOMS
Web Telephony Engine (WTE) 1.0 has several limitations that restrict its use:
 * WTE 1.0 works only with Microsoft Internet Explorer 5.0 and is not compatible with Internet Explorer 5.5 or later.
 * WTE 1.0 requires TAPI 3.0 or later.
 * Because of these Internet Explorer and Telephony Application Programming Interface (TAPI) limitations, WTE 1.0 works only on Windows 2000-based systems.
 * WTE 1.0 works only with the Speech SDK 4.0a and is not compatible with any other versions of the Speech SDK.
 * WTE 1.0 is not compatible with script debugging.



CAUSE
At the time that WTE was designed, Internet Explorer 5.0 and the Speech SDK 4.0a were the latest available versions. There have now been significant revisions to these products that have made later versions not compatible with WTE.



STATUS
This behavior is by design.



MORE INFORMATION
If Internet Explorer 5.5 (or later) or a Speech SDK later than version 4.0a is installed on your system, you cannot run WTE on the system without completely reinstalling Windows 2000, because neither Internet Explorer 5.5 nor the Speech SDK can be removed (uninstalled).

To debug WTE, click Internet Options on the Tools menu in Internet Explorer, click the Advanced tab, and then click to clear the Disable Script Debugging check box.

