Multilink ISDN in Windows NT 4.0 May Fail When Connecting On 2nd Channel (169136)
The information in this article applies to:
- Microsoft Windows NT Server 4.0
- Microsoft Windows NT Workstation 4.0
This article was previously published under Q169136 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:
Or contact Livingston Technical Support at 1-800-458-9966 or 510-426-0770.
| Modification Type: | Major | Last Reviewed: | 2/22/2002 |
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| Keywords: | kb3rdparty kbnetwork KB169136 |
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