Using an Unsupported Modem with Windows NT RAS
Summary: Some modems that are not listed on the Windows NT Hardware Compatibility
List (HCL) can still be used successfully with Windows NT Remote Access
Microsoft does not guarantee the functionality of hardware not present in
the most recent version of the Windows NT HCL; however, one of the
following workarounds may allow you to use an unsupported modem with
Windows NT RAS.
Provided by Microsoft
- Many modem vendors have created Modem.inf files for use with Windows
NT RAS. See if yours has by visiting the modem vendor's WWW site or BBS.
- When you are configuring RAS, select a modem setting of "Hayes
Compatible." RAS includes support for four generic "Hayes Compatible XXXX"
modems, where XXXX represents 1200, 2400, 9600, or 14400 (pick the proper
speed for your modem). Configuring your modem as a Hayes Compatible
device may allow it to function properly with RAS.
- Select another modem by the same manufacturer as your modem.
- If your modem is similar (e.g., if it has the same speed or supported
communication standards) to a Windows NT-supported modem by the same
manufacturer, try configuring your modem in RAS as that supported modem.
- You may need to modify the Modem.inf section of the supported modem to
make it compatible with your modem.
- Edit the Modem.inf file and add a new section for your modem.
- Before making any changes to Modem.inf, make a backup of the file.
- Use one of the existing modem sections as a template for your new
- Modify the settings to reflect the appropriate commands for your
modem, as defined in the documentation for your modem.
- You can find the list of requirements for a Modem.inf section by
searching for the following topic in the Remote Access Help File