RasDial Returns an Invalid Error Code

This article was previously published under Q239870
This article has been archived. It is offered "as is" and will no longer be updated.
Symptoms
When you are dialing with RasDial, you may receive error code 676 ("The line is busy") instead of code 680 ("There is no dial tone") if your telephone cable is unplugged or you are using a bad phone line.
Resolution

Windows NT Server or Workstation 4.0

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:
For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

Windows NT Server 4.0, Terminal Server Edition

To resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack

Status
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition.

This problem was first corrected in Windows NT Server 4.0 Service Pack 6 and Windows NT Server 4.0, Terminal Server Edition Service Pack 6.
More information
The error status returned to the callback routine in code that calls RasDial is inaccurate. Despite the true cause of the issue, RAS returns error code 676 ("The line is busy") for line-related issues. Specifically, the following conditions result in error code 676:
  • Phone line not plugged into the modem
  • No answer
  • No carrier (voice, fax, and so on)
The proper RAS error codes for these conditions are 680, 678, 679, 677, and so on.
rasdial.exe
Properties

Article ID: 239870 - Last Review: 11/02/2013 20:03:00 - Revision: 4.0

  • Microsoft Windows NT Server 4.0 Standard Edition
  • Microsoft Windows NT Workstation 4.0 Developer Edition
  • kbnosurvey kbarchive kbhotfixserver kbqfe kbbug kbfix KB239870
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