8.The next panel shows you what resources are available on your computer and how many adapters you have installed. Since Windows NT 4.0 is not a plug- and-play operating system, assigning free resources can be complicated.

9.In the next window, select the appropriate D-channel protocol for your ISDN line. For newer ISDN lines in Europe, select DSS1, the Euro-ISDN D-channel protocol. NI-1 and 5ESS are D-channel protocols used in the United States of America. 1TR6 is the older national D-channel protocol for Germany.

7. Installing the device drivers in Windows NT 4.0 37

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IBM 19K5716 manual Installing the device drivers in Windows NT 4.0