COM Port failures with Digiboard mc/XEM

ID: Q136858

The information in this article applies to:

Microsoft Windows NT Workstation version 3.51
Microsoft Windows NT Server version 3.51

SYMPTOMS

When you use a Digiboard XEM/mc multiport serial board for dial in access to a network on an NCR 3430 running with Windows NT Server RAS Server, some ports drop the RTS line and fail to respond to incoming dial-up connections after approximately 3000 connections.

CAUSE

The cause of this problem is currently under investigation. It seems to be configuration specific to the NCR 3430 Microchannel architecture and the Digiboard mc/XEM board.

WORKAROUND

To work around this problem, stop and restart the RAS service to reset the ports. You will need to do this every 3000 connections.

STATUS

Microsoft has confirmed this to be a problem Windows NT version 3.51. We are researching this problem and will post new information in the Microsoft Knowledge Base as it becomes available.

The third-party product discussed here is manufactured by a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.

Additional query words: prodnt 3.51

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