The Routing and Remote Access MMC snap-in detects and displays modem devices that are connected to COM ports automatically on a Windows 2000 Server-based computer

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256986 Description of the Microsoft Windows registry
You add a modem to one of the COM ports on a Microsoft Windows 2000 Server-based server computer. Then, you open the Routing and Remote Access Microsoft Management Console (MMC) snap-in. When you do this, you see that the modem is listed in the snap-in. This behavior occurs even though the port configuration settings in the snap-in are not configured to detect the modem.

In this situation, if you want to use the snap-in to correctly display the modems, you must first use the port configuration settings to release the modem. Then, you must reconfigure the modem.

Note The snap-in settings that you make are not retained after you restart the computer.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


You must be running Windows 2000 SP3 or Windows 2000 SP4 to install this hotfix.

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

Registry information

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

After you install the hotfix, follow these steps:
  1. Click Start, click Run, type regedit, and then click OK.
  2. Locate and then click the following registry subkey:
  3. On the Edit menu, point to New, and then click DWORD Value.
  4. Type DefaultModemRasEnabled, and then press ENTER.
  5. Double-click DefaultModemRasEnabled, make sure that the value for the registry entry is 0, and then click OK.

    Note Type 1 as the value for the DefaultModemRasEnabled registry entry if you do want to use the registry entry.
  6. Exit Registry Editor.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
File nameFile versionFile sizeDateTimePlatform
This is an expected behavior that is designed to occur because of the Plug and Play feature of the Windows operating system.
More information
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Article ID: 889294 - Last Review: 11/02/2013 19:08:00 - Revision: 4.0

  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Server
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