Microsoft KB Archive/126297

= WinNT 3.5 RAS Server Doesn't Call Back Non-3.5 Clients Over ISDN =

Article ID: 126297

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Server 3.5

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This article was previously published under Q126297



SYMPTOMS
A Windows NT 3.5 computer running Remote Access Service (RAS) fails to complete a callback to non-Windows NT 3.5 ISDN RAS clients (including Windows NT 3.1 RAS clients, Windows for Workgroups 3.11 RAS clients, and RAS 1.1a clients).

The non-Windows NT 3.5 RAS client times out while waiting for the callback. The RAS server stays in a "calling back user" state and maintains control of the port.

NOTE: This problem only occurs when connecting over ISDN.



CAUSE
There is a problem in the Windows NT 3.5 file, RASSRV.EXE. From Tony Bell: "Change made to RASSRV.EXE to set the framing type to AMB. This causes the Pcimac driver to start its inband negotiation from the server side and keeps the client from being stuck waiting for this negotiation to begin."

WORKAROUND
Use Windows NT 3.5 for both the RAS client and RAS server.

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.

Additional query words: prodnt 3.50

Keywords: KB126297

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