Multilink ISDN in WinNT 4.0 May Fail When Connect 2nd Channel

 Last reviewed: September 4, 1997
Article ID: Q169136
The information in this article applies to:
  • Microsoft Windows NT Server version 4.0
  • Microsoft Windows NT Workstation version 4.0

SUMMARY

When you try to establish a multilink connection (using multiple ISDN channels) to a Livingston Portmaster using Windows NT 4.0 Dial-Up Networking, the second channel may fail to connect and display the following error: 

   Error 721 remote PPP server is not responding
Also, in some cases the connection may drop with no errors.

However Windows 95 may connect both channels successfully.

CAUSE

This is caused by a limitation in certain versions of the firmware on the Livingston Portmaster, which do not allow simultaneous connections within 500 milliseconds of one another.

The reason Windows 95 clients can connect to the Livingston Portmaster and Windows NT clients fail is because Windows NT 4.0 tries to connect both channels simultaneously. Windows 95 establishes the connection on the first channel then dials the second channel.

RESOLUTION

To resolve this issue, update the code on the Livingston Portmaster to the latest version, which can be found at Livingston's website 

   http://www.livingston.com.
Or contact Livingston Technical Support at 1-800-458-9966 or 510-426-0770.

Additional query words: mulitlink multi-link ras ml
Keywords : NTRAS NTSrvWkst kb3rdparty kbnetwork
Version : WinNT:4.0
Platform : winnt

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: September 4, 1997
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.