Microsoft KB Archive/244390

= Cannot Connect to RAS Server at 56 Kbps =

Article ID: 244390

Article Last Modified on 1/25/2007

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APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Server 4.0 Enterprise Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Routing and Remote Access Service Update for Windows NT Server 4.0
 * Microsoft Windows 95
 * Microsoft Windows 98 Standard Edition

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This article was previously published under Q244390



SUMMARY
A Remote Access Services (RAS) server may not answer at 56 Kbps. You may get a connection at 28.8 or 33.6 Kbps.



MORE INFORMATION
This behavior can occur because standard analog phone lines are not capable of supporting the 56 Kbps standards. A digital line and special hardware is required to achieve a 56 Kbps connection.

The following three criteria must be met before a 56 Kbps connection succeeds:
 * A digital circuit is required at one end and the modem must be digital.
 * V.90 support is required at both ends.
 * There can be no more than one analog to digital conversion in the path between the modems.

