Here are two specific suggestions:
- Run the latest version of Windows NT. If you are running version 3.1, at the minimum download the US Service Package from the Microsoft Download Service. This package consists of eight disks and is similar to what Apple calls a System Update. It is important to get this because there are fixes to the AppleTalk protocol stack.
- The preferred solution would be to upgrade to version 3.5 of Windows NT server. This version is vastly superior to 3.1, with speed gains in almost every service. In addition, the AppleTalk protocol stack is implemented correctly, making it more robust.
Note: It's probable that you have version 3.1 without any patches. Again, it is preferable to upgrade to version 3.5 of Windows NT.
The article titled "Locating Vendor Information" can help you search for a particular vendor's address and phone number.