RAS Does Not Autodetect Hayes Ultra 14.4 Modem (130281)


The information in this article applies to:

  • Microsoft Windows NT Workstation 3.5
  • Microsoft Windows NT Server 3.5
This article was previously published under Q130281

SYMPTOMS

Your Hayes Ultra 14400 modem is not detected properly by the modem autodetection feature of Windows NT Remote Access Service (RAS).

CAUSE

The Hayes Ultra 14400 section of the MODEM.INF file does not include a DETECT_STRING or a DETECT_RESPONSE command. These commands are required for RAS to autodetect a modem.

RESOLUTION

Do one of the following to configure your Hayes Ultra 14400 modem for RAS:
  • Skip the RAS modem autodetection feature and manually select the Hayes Ultra 14400 modem from the list of supported modems.

    -or-
  • Use the RAS modem autodetection feature and select the Hayes Optima 14400 modem from the list of modems returned by the autodetection. The Hayes Ultra 14400 uses the same section of the MODEM.INF as the Hayes Optima 14400.

    -or-
  • Add the following two lines to the [Hayes Ultra 14400] section of the %systemroot%\SYSTEM32\RAS\MODEM.INF file:
          DETECT_STRING=ATI0
      DETECT_RESPONSE=14400

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 3.5. This problem was corrected in Windows NT version 3.51.

The Ultra 14.4 modem is manufactured by Hayes, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.
Modification Type:MajorLast Reviewed:10/30/2003
Keywords:KB130281
©2003 Microsoft Corporation. All rights reserved.